Merging upstream version 1.31.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 10377 deletions

diff --git a/web/gui/dashboard.js b/web/gui/dashboard.js
deleted file mode 100644
index 53e9090b1..000000000
--- a/web/gui/dashboard.js
+++ /dev/null
@@ -1,10377 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-// DO NOT EDIT: This file is automatically generated from the source files in src/
-
-// ----------------------------------------------------------------------------
-// You can set the following variables before loading this script:
-
-// 'use strict';
-
-/*global netdataNoDygraphs           *//* boolean,  disable dygraph charts
- *                                                  (default: false) */
-/*global netdataNoSparklines         *//* boolean,  disable sparkline charts
- *                                                  (default: false) */
-/*global netdataNoPeitys             *//* boolean,  disable peity charts
- *                                                  (default: false) */
-/*global netdataNoGoogleCharts       *//* boolean,  disable google charts
- *                                                  (default: false) */
-/*global netdataNoMorris             *//* boolean,  disable morris charts
- *                                                  (default: false) */
-/*global netdataNoEasyPieChart       *//* boolean,  disable easypiechart charts
- *                                                  (default: false) */
-/*global netdataNoGauge              *//* boolean,  disable gauge.js charts
- *                                                  (default: false) */
-/*global netdataNoD3                 *//* boolean,  disable d3 charts
- *                                                  (default: false) */
-/*global netdataNoC3                 *//* boolean,  disable c3 charts
- *                                                  (default: false) */
-/*global netdataNoD3pie              *//* boolean,  disable d3pie charts
- *                                                  (default: false) */
-/*global netdataNoBootstrap          *//* boolean,  disable bootstrap - disables help too
- *                                                  (default: false) */
-/*global netdataNoFontAwesome        *//* boolean,  disable fontawesome (do not load it)
- *                                                  (default: false) */
-/*global netdataIcons                *//* object,   overwrite netdata fontawesome icons
- *                                                  (default: null) */
-/*global netdataDontStart            *//* boolean,  do not start the thread to process the charts
- *                                                  (default: false) */
-/*global netdataErrorCallback        *//* function, callback to be called when the dashboard encounters an error
- *                                                  (default: null) */
-/*global netdataRegistry:true        *//* boolean,  use the netdata registry
- *                                                  (default: false) */
-/*global netdataNoRegistry           *//* boolean,  included only for compatibility with existing custom dashboard
- *                                                  (obsolete - do not use this any more) */
-/*global netdataRegistryCallback     *//* function, callback that will be invoked with one param: the URLs from the registry
- *                                                  (default: null) */
-/*global netdataShowHelp:true        *//* boolean,  disable charts help
- *                                                  (default: true) */
-/*global netdataShowAlarms:true      *//* boolean,  enable alarms checks and notifications
- *                                                  (default: false) */
-/*global netdataRegistryAfterMs:true *//* ms,       delay registry use at started
- *                                                  (default: 1500) */
-/*global netdataCallback             *//* function, callback to be called when netdata is ready to start
- *                                                  (default: null)
- *                                                  netdata will be running while this is called
- *                                                  (call NETDATA.pause to stop it) */
-/*global netdataPrepCallback         *//* function, callback to be called before netdata does anything else
- *                                                  (default: null) */
-/*global netdataServer               *//* string,   the URL of the netdata server to use
- *                                                  (default: the URL the page is hosted at) */
-/*global netdataServerStatic         *//* string,   the URL of the netdata server to use for static files
- *                                                  (default: netdataServer) */
-/*global netdataSnapshotData         *//* object,   a netdata snapshot loaded
- *                                                  (default: null) */
-/*global netdataAlarmsRecipients     *//* array,    an array of alarm recipients to show notifications for
- *                                                  (default: null) */
-/*global netdataAlarmsRemember       *//* boolen,   keep our position in the alarm log at browser local storage
- *                                                  (default: true) */
-/*global netdataAlarmsActiveCallback *//* function, a hook for the alarm logs
- *                                                  (default: undefined) */
-/*global netdataAlarmsNotifCallback  *//* function, a hook for alarm notifications
- *                                                  (default: undefined) */
-/*global netdataIntersectionObserver *//* boolean,  enable or disable the use of intersection observer
- *                                                  (default: true) */
-/*global netdataCheckXSS             *//* boolean,  enable or disable checking for XSS issues
- *                                                  (default: false) */
-
-// ----------------------------------------------------------------------------
-// global namespace
-
-// Should stay var!
-var NETDATA = window.NETDATA || {};
-
-(function(window, document, $, undefined) {
-
-// *** src/dashboard.js/utils.js
-
-NETDATA.name2id = function (s) {
-    return s
-        .replace(/ /g, '_')
-        .replace(/:/g, '_')
-        .replace(/\(/g, '_')
-        .replace(/\)/g, '_')
-        .replace(/\./g, '_')
-        .replace(/\//g, '_');
-};
-
-NETDATA.encodeURIComponent = function (s) {
-    if (typeof(s) === 'string') {
-        return encodeURIComponent(s);
-    }
-
-    return s;
-};
-
-/// A heuristic for detecting slow devices.
-let isSlowDeviceResult = undefined;
-const isSlowDevice = function () {
-    if (!isSlowDeviceResult) {
-        return isSlowDeviceResult;
-    }
-
-    try {
-        let ua = navigator.userAgent.toLowerCase();
-
-        let iOS = /ipad|iphone|ipod/.test(ua) && !window.MSStream;
-        let android = /android/.test(ua) && !window.MSStream;
-        isSlowDeviceResult = (iOS || android);
-    } catch (e) {
-        isSlowDeviceResult = false;
-    }
-
-    return isSlowDeviceResult;
-};
-
-NETDATA.guid = function () {
-    function s4() {
-        return Math.floor((1 + Math.random()) * 0x10000)
-            .toString(16)
-            .substring(1);
-    }
-
-    return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
-};
-
-NETDATA.zeropad = function (x) {
-    if (x > -10 && x < 10) {
-        return '0' + x.toString();
-    } else {
-        return x.toString();
-    }
-};
-
-NETDATA.seconds4human = function (seconds, options) {
-    let defaultOptions = {
-        now: 'now',
-        space: ' ',
-        negative_suffix: 'ago',
-        day: 'day',
-        days: 'days',
-        hour: 'hour',
-        hours: 'hours',
-        minute: 'min',
-        minutes: 'mins',
-        second: 'sec',
-        seconds: 'secs',
-        and: 'and'
-    };
-
-    if (typeof options !== 'object') {
-        options = defaultOptions;
-    } else {
-        for (var x in defaultOptions) {
-            if (typeof options[x] !== 'string') {
-                options[x] = defaultOptions[x];
-            }
-        }
-    }
-
-    if (typeof seconds === 'string') {
-        seconds = parseInt(seconds, 10);
-    }
-
-    if (seconds === 0) {
-        return options.now;
-    }
-
-    let suffix = '';
-    if (seconds < 0) {
-        seconds = -seconds;
-        if (options.negative_suffix !== '') {
-            suffix = options.space + options.negative_suffix;
-        }
-    }
-
-    let days = Math.floor(seconds / 86400);
-    seconds -= (days * 86400);
-
-    let hours = Math.floor(seconds / 3600);
-    seconds -= (hours * 3600);
-
-    let minutes = Math.floor(seconds / 60);
-    seconds -= (minutes * 60);
-
-    let strings = [];
-
-    if (days > 1) {
-        strings.push(days.toString() + options.space + options.days);
-    } else if (days === 1) {
-        strings.push(days.toString() + options.space + options.day);
-    }
-
-    if (hours > 1) {
-        strings.push(hours.toString() + options.space + options.hours);
-    } else if (hours === 1) {
-        strings.push(hours.toString() + options.space + options.hour);
-    }
-
-    if (minutes > 1) {
-        strings.push(minutes.toString() + options.space + options.minutes);
-    } else if (minutes === 1) {
-        strings.push(minutes.toString() + options.space + options.minute);
-    }
-
-    if (seconds > 1) {
-        strings.push(Math.floor(seconds).toString() + options.space + options.seconds);
-    } else if (seconds === 1) {
-        strings.push(Math.floor(seconds).toString() + options.space + options.second);
-    }
-
-    if (strings.length === 1) {
-        return strings.pop() + suffix;
-    }
-
-    let last = strings.pop();
-    return strings.join(", ") + " " + options.and + " " + last + suffix;
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// element data attributes
-
-NETDATA.dataAttribute = function (element, attribute, def) {
-    let key = 'data-' + attribute.toString();
-    if (element.hasAttribute(key)) {
-        let data = element.getAttribute(key);
-
-        if (data === 'true') {
-            return true;
-        }
-        if (data === 'false') {
-            return false;
-        }
-        if (data === 'null') {
-            return null;
-        }
-
-        // Only convert to a number if it doesn't change the string
-        if (data === +data + '') {
-            return +data;
-        }
-
-        if (/^(?:\{[\w\W]*\}|\[[\w\W]*\])$/.test(data)) {
-            return JSON.parse(data);
-        }
-
-        return data;
-    } else {
-        return def;
-    }
-};
-
-NETDATA.dataAttributeBoolean = function (element, attribute, def) {
-    let value = NETDATA.dataAttribute(element, attribute, def);
-
-    if (value === true || value === false) // gmosx: Love this :)
-    {
-        return value;
-    }
-
-    if (typeof(value) === 'string') {
-        if (value === 'yes' || value === 'on') {
-            return true;
-        }
-
-        if (value === '' || value === 'no' || value === 'off' || value === 'null') {
-            return false;
-        }
-
-        return def;
-    }
-
-    if (typeof(value) === 'number') {
-        return value !== 0;
-    }
-
-    return def;
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// fast numbers formatting
-
-NETDATA.fastNumberFormat = {
-    formattersFixed: [],
-    formattersZeroBased: [],
-
-    // this is the fastest and the preferred
-    getIntlNumberFormat: function (min, max) {
-        let key = max;
-        if (min === max) {
-            if (typeof this.formattersFixed[key] === 'undefined') {
-                this.formattersFixed[key] = new Intl.NumberFormat(undefined, {
-                    // style: 'decimal',
-                    // minimumIntegerDigits: 1,
-                    // minimumSignificantDigits: 1,
-                    // maximumSignificantDigits: 1,
-                    useGrouping: true,
-                    minimumFractionDigits: min,
-                    maximumFractionDigits: max
-                });
-            }
-
-            return this.formattersFixed[key];
-        } else if (min === 0) {
-            if (typeof this.formattersZeroBased[key] === 'undefined') {
-                this.formattersZeroBased[key] = new Intl.NumberFormat(undefined, {
-                    // style: 'decimal',
-                    // minimumIntegerDigits: 1,
-                    // minimumSignificantDigits: 1,
-                    // maximumSignificantDigits: 1,
-                    useGrouping: true,
-                    minimumFractionDigits: min,
-                    maximumFractionDigits: max
-                });
-            }
-
-            return this.formattersZeroBased[key];
-        } else {
-            // this is never used
-            // it is added just for completeness
-            return new Intl.NumberFormat(undefined, {
-                // style: 'decimal',
-                // minimumIntegerDigits: 1,
-                // minimumSignificantDigits: 1,
-                // maximumSignificantDigits: 1,
-                useGrouping: true,
-                minimumFractionDigits: min,
-                maximumFractionDigits: max
-            });
-        }
-    },
-
-    // this respects locale
-    getLocaleString: function (min, max) {
-        let key = max;
-        if (min === max) {
-            if (typeof this.formattersFixed[key] === 'undefined') {
-                this.formattersFixed[key] = {
-                    format: function (value) {
-                        return value.toLocaleString(undefined, {
-                            // style: 'decimal',
-                            // minimumIntegerDigits: 1,
-                            // minimumSignificantDigits: 1,
-                            // maximumSignificantDigits: 1,
-                            useGrouping: true,
-                            minimumFractionDigits: min,
-                            maximumFractionDigits: max
-                        });
-                    }
-                };
-            }
-
-            return this.formattersFixed[key];
-        } else if (min === 0) {
-            if (typeof this.formattersZeroBased[key] === 'undefined') {
-                this.formattersZeroBased[key] = {
-                    format: function (value) {
-                        return value.toLocaleString(undefined, {
-                            // style: 'decimal',
-                            // minimumIntegerDigits: 1,
-                            // minimumSignificantDigits: 1,
-                            // maximumSignificantDigits: 1,
-                            useGrouping: true,
-                            minimumFractionDigits: min,
-                            maximumFractionDigits: max
-                        });
-                    }
-                };
-            }
-
-            return this.formattersZeroBased[key];
-        } else {
-            return {
-                format: function (value) {
-                    return value.toLocaleString(undefined, {
-                        // style: 'decimal',
-                        // minimumIntegerDigits: 1,
-                        // minimumSignificantDigits: 1,
-                        // maximumSignificantDigits: 1,
-                        useGrouping: true,
-                        minimumFractionDigits: min,
-                        maximumFractionDigits: max
-                    });
-                }
-            };
-        }
-    },
-
-    // the fallback
-    getFixed: function (min, max) {
-        let key = max;
-        if (min === max) {
-            if (typeof this.formattersFixed[key] === 'undefined') {
-                this.formattersFixed[key] = {
-                    format: function (value) {
-                        if (value === 0) {
-                            return "0";
-                        }
-                        return value.toFixed(max);
-                    }
-                };
-            }
-
-            return this.formattersFixed[key];
-        } else if (min === 0) {
-            if (typeof this.formattersZeroBased[key] === 'undefined') {
-                this.formattersZeroBased[key] = {
-                    format: function (value) {
-                        if (value === 0) {
-                            return "0";
-                        }
-                        return value.toFixed(max);
-                    }
-                };
-            }
-
-            return this.formattersZeroBased[key];
-        } else {
-            return {
-                format: function (value) {
-                    if (value === 0) {
-                        return "0";
-                    }
-                    return value.toFixed(max);
-                }
-            };
-        }
-    },
-
-    testIntlNumberFormat: function () {
-        let value = 1.12345;
-        let e1 = "1.12", e2 = "1,12";
-        let s = "";
-
-        try {
-            let x = new Intl.NumberFormat(undefined, {
-                useGrouping: true,
-                minimumFractionDigits: 2,
-                maximumFractionDigits: 2
-            });
-
-            s = x.format(value);
-        } catch (e) {
-            s = "";
-        }
-
-        // console.log('NumberFormat: ', s);
-        return (s === e1 || s === e2);
-    },
-
-    testLocaleString: function () {
-        let value = 1.12345;
-        let e1 = "1.12", e2 = "1,12";
-        let s = "";
-
-        try {
-            s = value.toLocaleString(undefined, {
-                useGrouping: true,
-                minimumFractionDigits: 2,
-                maximumFractionDigits: 2
-            });
-        } catch (e) {
-            s = "";
-        }
-
-        // console.log('localeString: ', s);
-        return (s === e1 || s === e2);
-    },
-
-    // on first run we decide which formatter to use
-    get: function (min, max) {
-        if (this.testIntlNumberFormat()) {
-            // console.log('numberformat');
-            this.get = this.getIntlNumberFormat;
-        } else if (this.testLocaleString()) {
-            // console.log('localestring');
-            this.get = this.getLocaleString;
-        } else {
-            // console.log('fixed');
-            this.get = this.getFixed;
-        }
-        return this.get(min, max);
-    }
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// Detect the netdata server
-
-// http://stackoverflow.com/questions/984510/what-is-my-script-src-url
-// http://stackoverflow.com/questions/6941533/get-protocol-domain-and-port-from-url
-NETDATA._scriptSource = function () {
-    let script = null;
-
-    if (typeof document.currentScript !== 'undefined') {
-        script = document.currentScript;
-    } else {
-        const all_scripts = document.getElementsByTagName('script');
-        script = all_scripts[all_scripts.length - 1];
-    }
-
-    if (typeof script.getAttribute.length !== 'undefined') {
-        script = script.src;
-    } else {
-        script = script.getAttribute('src', -1);
-    }
-
-    return script;
-};
-
-// *** src/dashboard.js/server-detection.js
-
-if (typeof netdataServer !== 'undefined') {
-    NETDATA.serverDefault = netdataServer;
-} else {
-    let s = NETDATA._scriptSource();
-    if (s) {
-        NETDATA.serverDefault = s.replace(/\/dashboard.js(\?.*)?$/g, "");
-    } else {
-        console.log('WARNING: Cannot detect the URL of the netdata server.');
-        NETDATA.serverDefault = null;
-    }
-}
-
-if (NETDATA.serverDefault === null) {
-    NETDATA.serverDefault = '';
-} else if (NETDATA.serverDefault.slice(-1) !== '/') {
-    NETDATA.serverDefault += '/';
-}
-
-if (typeof netdataServerStatic !== 'undefined' && netdataServerStatic !== null && netdataServerStatic !== '') {
-    NETDATA.serverStatic = netdataServerStatic;
-    if (NETDATA.serverStatic.slice(-1) !== '/') {
-        NETDATA.serverStatic += '/';
-    }
-} else {
-    NETDATA.serverStatic = NETDATA.serverDefault;
-}
-
-// *** src/dashboard.js/dependencies.js
-
-// default URLs for all the external files we need
-// make them RELATIVE so that the whole thing can also be
-// installed under a web server
-NETDATA.jQuery = NETDATA.serverStatic + 'lib/jquery-2.2.4.min.js';
-NETDATA.peity_js = NETDATA.serverStatic + 'lib/jquery.peity-3.2.0.min.js';
-NETDATA.sparkline_js = NETDATA.serverStatic + 'lib/jquery.sparkline-2.1.2.min.js';
-NETDATA.easypiechart_js = NETDATA.serverStatic + 'lib/jquery.easypiechart-97b5824.min.js';
-NETDATA.gauge_js = NETDATA.serverStatic + 'lib/gauge-1.3.2.min.js';
-NETDATA.dygraph_js = NETDATA.serverStatic + 'lib/dygraph-c91c859.min.js';
-NETDATA.dygraph_smooth_js = NETDATA.serverStatic + 'lib/dygraph-smooth-plotter-c91c859.js';
-// NETDATA.raphael_js          = NETDATA.serverStatic + 'lib/raphael-2.2.4-min.js';
-// NETDATA.c3_js               = NETDATA.serverStatic + 'lib/c3-0.4.18.min.js';
-// NETDATA.c3_css              = NETDATA.serverStatic + 'css/c3-0.4.18.min.css';
-NETDATA.d3pie_js = NETDATA.serverStatic + 'lib/d3pie-0.2.1-netdata-3.js';
-NETDATA.d3_js = NETDATA.serverStatic + 'lib/d3-4.12.2.min.js';
-// NETDATA.morris_js           = NETDATA.serverStatic + 'lib/morris-0.5.1.min.js';
-// NETDATA.morris_css          = NETDATA.serverStatic + 'css/morris-0.5.1.css';
-NETDATA.google_js = 'https://www.google.com/jsapi';
-// Error Handling
-
-NETDATA.errorCodes = {
-    100: {message: "Cannot load chart library", alert: true},
-    101: {message: "Cannot load jQuery", alert: true},
-    402: {message: "Chart library not found", alert: false},
-    403: {message: "Chart library not enabled/is failed", alert: false},
-    404: {message: "Chart not found", alert: false},
-    405: {message: "Cannot download charts index from server", alert: true},
-    406: {message: "Invalid charts index downloaded from server", alert: true},
-    407: {message: "Cannot HELLO netdata server", alert: false},
-    408: {message: "Netdata servers sent invalid response to HELLO", alert: false},
-    409: {message: "Cannot ACCESS netdata registry", alert: false},
-    410: {message: "Netdata registry ACCESS failed", alert: false},
-    411: {message: "Netdata registry server send invalid response to DELETE ", alert: false},
-    412: {message: "Netdata registry DELETE failed", alert: false},
-    413: {message: "Netdata registry server send invalid response to SWITCH ", alert: false},
-    414: {message: "Netdata registry SWITCH failed", alert: false},
-    415: {message: "Netdata alarms download failed", alert: false},
-    416: {message: "Netdata alarms log download failed", alert: false},
-    417: {message: "Netdata registry server send invalid response to SEARCH ", alert: false},
-    418: {message: "Netdata registry SEARCH failed", alert: false}
-};
-
-NETDATA.errorLast = {
-    code: 0,
-    message: "",
-    datetime: 0
-};
-
-NETDATA.error = function (code, msg) {
-    NETDATA.errorLast.code = code;
-    NETDATA.errorLast.message = msg;
-    NETDATA.errorLast.datetime = Date.now();
-
-    console.log("ERROR " + code + ": " + NETDATA.errorCodes[code].message + ": " + msg);
-
-    let ret = true;
-    if (typeof netdataErrorCallback === 'function') {
-        ret = netdataErrorCallback('system', code, msg);
-    }
-
-    if (ret && NETDATA.errorCodes[code].alert) {
-        alert("ERROR " + code + ": " + NETDATA.errorCodes[code].message + ": " + msg);
-    }
-};
-
-NETDATA.errorReset = function () {
-    NETDATA.errorLast.code = 0;
-    NETDATA.errorLast.message = "You are doing fine!";
-    NETDATA.errorLast.datetime = 0;
-};
-// *** src/dashboard.js/compatibility.js
-
-// Compatibility fixes.
-
-// fix IE issue with console
-if (!window.console) {
-    window.console = {
-        log: function () {
-        }
-    };
-}
-
-// if string.endsWith is not defined, define it
-if (typeof String.prototype.endsWith !== 'function') {
-    String.prototype.endsWith = function (s) {
-        if (s.length > this.length) {
-            return false;
-        }
-        return this.slice(-s.length) === s;
-    };
-}
-
-// if string.startsWith is not defined, define it
-if (typeof String.prototype.startsWith !== 'function') {
-    String.prototype.startsWith = function (s) {
-        if (s.length > this.length) {
-            return false;
-        }
-        return this.slice(s.length) === s;
-    };
-}
-// ----------------------------------------------------------------------------------------------------------------
-// XSS checks
-
-NETDATA.xss = {
-    enabled: (typeof netdataCheckXSS === 'undefined') ? false : netdataCheckXSS,
-    enabled_for_data: (typeof netdataCheckXSS === 'undefined') ? false : netdataCheckXSS,
-
-    string: function (s) {
-        return s.toString()
-            .replace(/</g, '&lt;')
-            .replace(/>/g, '&gt;')
-            .replace(/"/g, '&quot;')
-            .replace(/'/g, '&#39;');
-    },
-
-    object: function (name, obj, ignore_regex) {
-        if (typeof ignore_regex !== 'undefined' && ignore_regex.test(name)) {
-            // console.log('XSS: ignoring "' + name + '"');
-            return obj;
-        }
-
-        switch (typeof(obj)) {
-            case 'string':
-                const ret = this.string(obj);
-                if (ret !== obj) {
-                    console.log('XSS protection changed string ' + name + ' from "' + obj + '" to "' + ret + '"');
-                }
-                return ret;
-
-            case 'object':
-                if (obj === null) {
-                    return obj;
-                }
-
-                if (Array.isArray(obj)) {
-                    // console.log('checking array "' + name + '"');
-
-                    let len = obj.length;
-                    while (len--) {
-                        obj[len] = this.object(name + '[' + len + ']', obj[len], ignore_regex);
-                    }
-                } else {
-                    // console.log('checking object "' + name + '"');
-
-                    for (var i in obj) {
-                        if (obj.hasOwnProperty(i) === false) {
-                            continue;
-                        }
-                        if (this.string(i) !== i) {
-                            console.log('XSS protection removed invalid object member "' + name + '.' + i + '"');
-                            delete obj[i];
-                        } else {
-                            obj[i] = this.object(name + '.' + i, obj[i], ignore_regex);
-                        }
-                    }
-                }
-                return obj;
-
-            default:
-                return obj;
-        }
-    },
-
-    checkOptional: function (name, obj, ignore_regex) {
-        if (this.enabled) {
-            //console.log('XSS: checking optional "' + name + '"...');
-            return this.object(name, obj, ignore_regex);
-        }
-        return obj;
-    },
-
-    checkAlways: function (name, obj, ignore_regex) {
-        //console.log('XSS: checking always "' + name + '"...');
-        return this.object(name, obj, ignore_regex);
-    },
-
-    checkData: function (name, obj, ignore_regex) {
-        if (this.enabled_for_data) {
-            //console.log('XSS: checking data "' + name + '"...');
-            return this.object(name, obj, ignore_regex);
-        }
-        return obj;
-    }
-};
-NETDATA.colorHex2Rgb = function (hex) {
-    // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
-    let shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
-    hex = hex.replace(shorthandRegex, function (m, r, g, b) {
-        return r + r + g + g + b + b;
-    });
-
-    let result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
-    return result ? {
-        r: parseInt(result[1], 16),
-        g: parseInt(result[2], 16),
-        b: parseInt(result[3], 16)
-    } : null;
-};
-
-NETDATA.colorLuminance = function (hex, lum) {
-    // validate hex string
-    hex = String(hex).replace(/[^0-9a-f]/gi, '');
-    if (hex.length < 6) {
-        hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
-    }
-
-    lum = lum || 0;
-
-    // convert to decimal and change luminosity
-    let rgb = "#";
-    for (let i = 0; i < 3; i++) {
-        let c = parseInt(hex.substr(i * 2, 2), 16);
-        c = Math.round(Math.min(Math.max(0, c + (c * lum)), 255)).toString(16);
-        rgb += ("00" + c).substr(c.length);
-    }
-
-    return rgb;
-};
-NETDATA.unitsConversion = {
-    keys: {},       // keys for data-common-units
-    latest: {},     // latest selected units for data-common-units
-
-    globalReset: function () {
-        this.keys = {};
-        this.latest = {};
-    },
-
-    scalableUnits: {
-        'packets/s': {
-            'pps': 1,
-            'Kpps': 1000,
-            'Mpps': 1000000
-        },
-        'pps': {
-            'pps': 1,
-            'Kpps': 1000,
-            'Mpps': 1000000
-        },
-        'kilobits/s': {
-            'bits/s': 1 / 1000,
-            'kilobits/s': 1,
-            'megabits/s': 1000,
-            'gigabits/s': 1000000,
-            'terabits/s': 1000000000
-        },
-        'bytes/s': {
-            'bytes/s': 1,
-            'kilobytes/s': 1024,
-            'megabytes/s': 1024 * 1024,
-            'gigabytes/s': 1024 * 1024 * 1024,
-            'terabytes/s': 1024 * 1024 * 1024 * 1024
-        },
-        'kilobytes/s': {
-            'bytes/s': 1 / 1024,
-            'kilobytes/s': 1,
-            'megabytes/s': 1024,
-            'gigabytes/s': 1024 * 1024,
-            'terabytes/s': 1024 * 1024 * 1024
-        },
-        'B/s': {
-            'B/s': 1,
-            'KiB/s': 1024,
-            'MiB/s': 1024 * 1024,
-            'GiB/s': 1024 * 1024 * 1024,
-            'TiB/s': 1024 * 1024 * 1024 * 1024
-        },
-        'KB/s': {
-            'B/s': 1 / 1024,
-            'KB/s': 1,
-            'MB/s': 1024,
-            'GB/s': 1024 * 1024,
-            'TB/s': 1024 * 1024 * 1024
-        },
-        'KiB/s': {
-            'B/s': 1 / 1024,
-            'KiB/s': 1,
-            'MiB/s': 1024,
-            'GiB/s': 1024 * 1024,
-            'TiB/s': 1024 * 1024 * 1024
-        },
-        'B': {
-            'B': 1,
-            'KiB': 1024,
-            'MiB': 1024 * 1024,
-            'GiB': 1024 * 1024 * 1024,
-            'TiB': 1024 * 1024 * 1024 * 1024,
-            'PiB': 1024 * 1024 * 1024 * 1024 * 1024
-        },
-        'KB': {
-            'B': 1 / 1024,
-            'KB': 1,
-            'MB': 1024,
-            'GB': 1024 * 1024,
-            'TB': 1024 * 1024 * 1024
-        },
-        'KiB': {
-            'B': 1 / 1024,
-            'KiB': 1,
-            'MiB': 1024,
-            'GiB': 1024 * 1024,
-            'TiB': 1024 * 1024 * 1024
-        },
-        'MB': {
-            'B': 1 / (1024 * 1024),
-            'KB': 1 / 1024,
-            'MB': 1,
-            'GB': 1024,
-            'TB': 1024 * 1024,
-            'PB': 1024 * 1024 * 1024
-        },
-        'MiB': {
-            'B': 1 / (1024 * 1024),
-            'KiB': 1 / 1024,
-            'MiB': 1,
-            'GiB': 1024,
-            'TiB': 1024 * 1024,
-            'PiB': 1024 * 1024 * 1024
-        },
-        'GB': {
-            'B': 1 / (1024 * 1024 * 1024),
-            'KB': 1 / (1024 * 1024),
-            'MB': 1 / 1024,
-            'GB': 1,
-            'TB': 1024,
-            'PB': 1024 * 1024,
-            'EB': 1024 * 1024 * 1024
-        },
-        'GiB': {
-            'B': 1 / (1024 * 1024 * 1024),
-            'KiB': 1 / (1024 * 1024),
-            'MiB': 1 / 1024,
-            'GiB': 1,
-            'TiB': 1024,
-            'PiB': 1024 * 1024,
-            'EiB': 1024 * 1024 * 1024
-        },
-        'num': {
-            'num': 1,
-            'num (K)': 1000,
-            'num (M)': 1000000,
-            'num (G)': 1000000000,
-            'num (T)': 1000000000000
-        }
-        /*
-        'milliseconds': {
-            'seconds': 1000
-        },
-        'seconds': {
-            'milliseconds': 0.001,
-            'seconds': 1,
-            'minutes': 60,
-            'hours': 3600,
-            'days': 86400
-        }
-        */
-    },
-
-    convertibleUnits: {
-        'Celsius': {
-            'Fahrenheit': {
-                check: function (max) {
-                    void(max);
-                    return NETDATA.options.current.temperature === 'fahrenheit';
-                },
-                convert: function (value) {
-                    return value * 9 / 5 + 32;
-                }
-            }
-        },
-        'celsius': {
-            'fahrenheit': {
-                check: function (max) {
-                    void(max);
-                    return NETDATA.options.current.temperature === 'fahrenheit';
-                },
-                convert: function (value) {
-                    return value * 9 / 5 + 32;
-                }
-            }
-        },
-        'seconds': {
-            'time': {
-                check: function (max) {
-                    void(max);
-                    return NETDATA.options.current.seconds_as_time;
-                },
-                convert: function (seconds) {
-                    return NETDATA.unitsConversion.seconds2time(seconds);
-                }
-            }
-        },
-        'milliseconds': {
-            'milliseconds': {
-                check: function (max) {
-                    return NETDATA.options.current.seconds_as_time && max < 1000;
-                },
-                convert: function (milliseconds) {
-                    let tms = Math.round(milliseconds * 10);
-                    milliseconds = Math.floor(tms / 10);
-
-                    tms -= milliseconds * 10;
-
-                    return (milliseconds).toString() + '.' + tms.toString();
-                }
-            },
-            'seconds': {
-                check: function (max) {
-                    return NETDATA.options.current.seconds_as_time && max >= 1000 && max < 60000;
-                },
-                convert: function (milliseconds) {
-                    milliseconds = Math.round(milliseconds);
-
-                    let seconds = Math.floor(milliseconds / 1000);
-                    milliseconds -= seconds * 1000;
-
-                    milliseconds = Math.round(milliseconds / 10);
-
-                    return seconds.toString() + '.'
-                        + NETDATA.zeropad(milliseconds);
-                }
-            },
-            'M:SS.ms': {
-                check: function (max) {
-                    return NETDATA.options.current.seconds_as_time && max >= 60000;
-                },
-                convert: function (milliseconds) {
-                    milliseconds = Math.round(milliseconds);
-
-                    let minutes = Math.floor(milliseconds / 60000);
-                    milliseconds -= minutes * 60000;
-
-                    let seconds = Math.floor(milliseconds / 1000);
-                    milliseconds -= seconds * 1000;
-
-                    milliseconds = Math.round(milliseconds / 10);
-
-                    return minutes.toString() + ':'
-                        + NETDATA.zeropad(seconds) + '.'
-                        + NETDATA.zeropad(milliseconds);
-                }
-            }
-        },
-        'nanoseconds': {
-            'nanoseconds': {
-                check: function (max) {
-                    return NETDATA.options.current.seconds_as_time && max < 1000;
-                },
-                convert: function (nanoseconds) {
-                    let tms = Math.round(nanoseconds * 10);
-                    nanoseconds = Math.floor(tms / 10);
-
-                    tms -= nanoseconds * 10;
-
-                    return (nanoseconds).toString() + '.' + tms.toString();
-                }
-            },
-            'microseconds': {
-                check: function (max) {
-                    return NETDATA.options.current.seconds_as_time
-                           && max >= 1000 && max < 1000 * 1000;
-                },
-                convert: function (nanoseconds) {
-                    nanoseconds = Math.round(nanoseconds);
-
-                    let microseconds = Math.floor(nanoseconds / 1000);
-                    nanoseconds -= microseconds * 1000;
-
-                    nanoseconds = Math.round(nanoseconds / 10 );
-
-                    return microseconds.toString() + '.'
-                        + NETDATA.zeropad(nanoseconds);
-                }
-            },
-            'milliseconds': {
-                check: function (max) {
-                    return NETDATA.options.current.seconds_as_time
-                           && max >= 1000 * 1000 && max < 1000 * 1000 * 1000;
-                },
-                convert: function (nanoseconds) {
-                    nanoseconds = Math.round(nanoseconds);
-
-                    let milliseconds = Math.floor(nanoseconds / 1000 / 1000);
-                    nanoseconds -= milliseconds * 1000 * 1000;
-
-                    nanoseconds = Math.round(nanoseconds / 1000 / 10);
-
-                    return milliseconds.toString() + '.'
-                        + NETDATA.zeropad(nanoseconds);
-                }
-            },
-            'seconds': {
-                check: function (max) {
-                    return NETDATA.options.current.seconds_as_time
-                           && max >= 1000 * 1000 * 1000;
-                },
-                convert: function (nanoseconds) {
-                    nanoseconds = Math.round(nanoseconds);
-
-                    let seconds = Math.floor(nanoseconds / 1000 / 1000 / 1000);
-                    nanoseconds -= seconds * 1000 * 1000 * 1000;
-
-                    nanoseconds = Math.round(nanoseconds / 1000 / 1000 / 10);
-
-                    return seconds.toString() + '.'
-                        + NETDATA.zeropad(nanoseconds);
-                }
-            },
-        }
-    },
-
-    seconds2time: function (seconds) {
-        seconds = Math.abs(seconds);
-
-        let days = Math.floor(seconds / 86400);
-        seconds -= days * 86400;
-
-        let hours = Math.floor(seconds / 3600);
-        seconds -= hours * 3600;
-
-        let minutes = Math.floor(seconds / 60);
-        seconds -= minutes * 60;
-
-        seconds = Math.round(seconds);
-
-        let ms_txt = '';
-        /*
-        let ms = seconds - Math.floor(seconds);
-        seconds -= ms;
-        ms = Math.round(ms * 1000);
-
-        if (ms > 1) {
-            if (ms < 10)
-                ms_txt = '.00' + ms.toString();
-            else if (ms < 100)
-                ms_txt = '.0' + ms.toString();
-            else
-                ms_txt = '.' + ms.toString();
-        }
-        */
-
-        return ((days > 0) ? days.toString() + 'd:' : '').toString()
-            + NETDATA.zeropad(hours) + ':'
-            + NETDATA.zeropad(minutes) + ':'
-            + NETDATA.zeropad(seconds)
-            + ms_txt;
-    },
-
-    // get a function that converts the units
-    // + every time units are switched call the callback
-    get: function (uuid, min, max, units, desired_units, common_units_name, switch_units_callback) {
-        // validate the parameters
-        if (typeof units === 'undefined') {
-            units = 'undefined';
-        }
-
-        // check if we support units conversion
-        if (typeof this.scalableUnits[units] === 'undefined' && typeof this.convertibleUnits[units] === 'undefined') {
-            // we can't convert these units
-            //console.log('DEBUG: ' + uuid.toString() + ' can\'t convert units: ' + units.toString());
-            return function (value) {
-                return value;
-            };
-        }
-
-        // check if the caller wants the original units
-        if (typeof desired_units === 'undefined' || desired_units === null || desired_units === 'original' || desired_units === units) {
-            //console.log('DEBUG: ' + uuid.toString() + ' original units wanted');
-            switch_units_callback(units);
-            return function (value) {
-                return value;
-            };
-        }
-
-        // now we know we can convert the units
-        // and the caller wants some kind of conversion
-
-        let tunits = null;
-        let tdivider = 0;
-
-        if (typeof this.scalableUnits[units] !== 'undefined') {
-            // units that can be scaled
-            // we decide a divider
-
-            // console.log('NETDATA.unitsConversion.get(' + units.toString() + ', ' + desired_units.toString() + ', function()) decide divider with min = ' + min.toString() + ', max = ' + max.toString());
-
-            if (desired_units === 'auto') {
-                // the caller wants to auto-scale the units
-
-                // find the absolute maximum value that is rendered on the chart
-                // based on this we decide the scale
-                min = Math.abs(min);
-                max = Math.abs(max);
-                if (min > max) {
-                    max = min;
-                }
-
-                // find the smallest scale that provides integers
-                // for (x in this.scalableUnits[units]) {
-                //     if (this.scalableUnits[units].hasOwnProperty(x)) {
-                //         let m = this.scalableUnits[units][x];
-                //         if (m <= max && m > tdivider) {
-                //             tunits = x;
-                //             tdivider = m;
-                //         }
-                //     }
-                // }
-                const sunit = this.scalableUnits[units];
-                for (var x of Object.keys(sunit)) {
-                    let m = sunit[x];
-                    if (m <= max && m > tdivider) {
-                        tunits = x;
-                        tdivider = m;
-                    }
-                }
-
-                if (tunits === null || tdivider <= 0) {
-                    // we couldn't find one
-                    //console.log('DEBUG: ' + uuid.toString() + ' cannot find an auto-scaling candidate for units: ' + units.toString() + ' (max: ' + max.toString() + ')');
-                    switch_units_callback(units);
-                    return function (value) {
-                        return value;
-                    };
-                }
-
-                if (typeof common_units_name === 'string' && typeof uuid === 'string') {
-                    // the caller wants several charts to have the same units
-                    // data-common-units
-
-                    let common_units_key = common_units_name + '-' + units;
-
-                    // add our divider into the list of keys
-                    let t = this.keys[common_units_key];
-                    if (typeof t === 'undefined') {
-                        this.keys[common_units_key] = {};
-                        t = this.keys[common_units_key];
-                    }
-                    t[uuid] = {
-                        units: tunits,
-                        divider: tdivider
-                    };
-
-                    // find the max divider of all charts
-                    let common_units = t[uuid];
-                    for (var x in t) {
-                        if (t.hasOwnProperty(x) && t[x].divider > common_units.divider) {
-                            common_units = t[x];
-                        }
-                    }
-
-                    // save our common_max to the latest keys
-                    let latest = this.latest[common_units_key];
-                    if (typeof latest === 'undefined') {
-                        this.latest[common_units_key] = {};
-                        latest = this.latest[common_units_key];
-                    }
-                    latest.units = common_units.units;
-                    latest.divider = common_units.divider;
-
-                    tunits = latest.units;
-                    tdivider = latest.divider;
-
-                    //console.log('DEBUG: ' + uuid.toString() + ' converted units: ' + units.toString() + ' to units: ' + tunits.toString() + ' with divider ' + tdivider.toString() + ', common-units=' + common_units_name.toString() + ((t[uuid].divider !== tdivider)?' USED COMMON, mine was ' + t[uuid].units:' set common').toString());
-
-                    // apply it to this chart
-                    switch_units_callback(tunits);
-                    return function (value) {
-                        if (tdivider !== latest.divider) {
-                            // another chart switched our common units
-                            // we should switch them too
-                            //console.log('DEBUG: ' + uuid + ' switching units due to a common-units change, from ' + tunits.toString() + ' to ' + latest.units.toString());
-                            tunits = latest.units;
-                            tdivider = latest.divider;
-                            switch_units_callback(tunits);
-                        }
-
-                        return value / tdivider;
-                    };
-                } else {
-                    // the caller did not give data-common-units
-                    // this chart auto-scales independently of all others
-                    //console.log('DEBUG: ' + uuid.toString() + ' converted units: ' + units.toString() + ' to units: ' + tunits.toString() + ' with divider ' + tdivider.toString() + ', autonomously');
-
-                    switch_units_callback(tunits);
-                    return function (value) {
-                        return value / tdivider;
-                    };
-                }
-            } else {
-                // the caller wants specific units
-
-                if (typeof this.scalableUnits[units][desired_units] !== 'undefined') {
-                    // all good, set the new units
-                    tdivider = this.scalableUnits[units][desired_units];
-                    // console.log('DEBUG: ' + uuid.toString() + ' converted units: ' + units.toString() + ' to units: ' + desired_units.toString() + ' with divider ' + tdivider.toString() + ', by reference');
-                    switch_units_callback(desired_units);
-                    return function (value) {
-                        return value / tdivider;
-                    };
-                } else {
-                    // oops! switch back to original units
-                    console.log('Units conversion from ' + units.toString() + ' to ' + desired_units.toString() + ' is not supported.');
-                    switch_units_callback(units);
-                    return function (value) {
-                        return value;
-                    };
-                }
-            }
-        } else if (typeof this.convertibleUnits[units] !== 'undefined') {
-            // units that can be converted
-            if (desired_units === 'auto') {
-                for (var x in this.convertibleUnits[units]) {
-                    if (this.convertibleUnits[units].hasOwnProperty(x)) {
-                        if (this.convertibleUnits[units][x].check(max)) {
-                            //console.log('DEBUG: ' + uuid.toString() + ' converting ' + units.toString() + ' to: ' + x.toString());
-                            switch_units_callback(x);
-                            return this.convertibleUnits[units][x].convert;
-                        }
-                    }
-                }
-
-                // none checked ok
-                //console.log('DEBUG: ' + uuid.toString() + ' no conversion available for ' + units.toString() + ' to: ' + desired_units.toString());
-                switch_units_callback(units);
-                return function (value) {
-                    return value;
-                };
-            } else if (typeof this.convertibleUnits[units][desired_units] !== 'undefined') {
-                switch_units_callback(desired_units);
-                return this.convertibleUnits[units][desired_units].convert;
-            } else {
-                console.log('Units conversion from ' + units.toString() + ' to ' + desired_units.toString() + ' is not supported.');
-                switch_units_callback(units);
-                return function (value) {
-                    return value;
-                };
-            }
-        } else {
-            // hm... did we forget to implement the new type?
-            console.log(`Unmatched unit conversion method for units ${units.toString()}`);
-            switch_units_callback(units);
-            return function (value) {
-                return value;
-            };
-        }
-    }
-};
-
-NETDATA.icons = {
-    left: '<i class="fas fa-backward"></i>',
-    reset: '<i class="fas fa-play"></i>',
-    right: '<i class="fas fa-forward"></i>',
-    zoomIn: '<i class="fas fa-plus"></i>',
-    zoomOut: '<i class="fas fa-minus"></i>',
-    resize: '<i class="fas fa-sort"></i>',
-    lineChart: '<i class="fas fa-chart-line"></i>',
-    areaChart: '<i class="fas fa-chart-area"></i>',
-    noChart: '<i class="fas fa-chart-area"></i>',
-    loading: '<i class="fas fa-sync-alt"></i>',
-    noData: '<i class="fas fa-exclamation-triangle"></i>'
-};
-
-if (typeof netdataIcons === 'object') {
-    // for (let icon in NETDATA.icons) {
-    //     if (NETDATA.icons.hasOwnProperty(icon) && typeof(netdataIcons[icon]) === 'string')
-    //         NETDATA.icons[icon] = netdataIcons[icon];
-    // }
-    for (var icon of Object.keys(NETDATA.icons)) {
-        if (typeof(netdataIcons[icon]) === 'string') {
-            NETDATA.icons[icon] = netdataIcons[icon]
-        }
-    }
-}
-
-if (typeof netdataSnapshotData === 'undefined') {
-    netdataSnapshotData = null;
-}
-
-if (typeof netdataShowHelp === 'undefined') {
-    netdataShowHelp = true;
-}
-
-if (typeof netdataShowAlarms === 'undefined') {
-    netdataShowAlarms = false;
-}
-
-if (typeof netdataRegistryAfterMs !== 'number' || netdataRegistryAfterMs < 0) {
-    netdataRegistryAfterMs = 0; // 1500;
-}
-
-if (typeof netdataRegistry === 'undefined') {
-    // backward compatibility
-    netdataRegistry = (typeof netdataNoRegistry !== 'undefined' && netdataNoRegistry === false);
-}
-
-if (netdataRegistry === false && typeof netdataRegistryCallback === 'function') {
-    netdataRegistry = true;
-}
-
-// ----------------------------------------------------------------------------------------------------------------
-// the defaults for all charts
-
-// if the user does not specify any of these, the following will be used
-
-NETDATA.chartDefaults = {
-    width: '100%',                  // the chart width - can be null
-    height: '100%',                 // the chart height - can be null
-    min_width: null,                // the chart minimum width - can be null
-    library: 'dygraph',             // the graphing library to use
-    method: 'average',              // the grouping method
-    before: 0,                      // panning
-    after: -600,                    // panning
-    pixels_per_point: 1,            // the detail of the chart
-    fill_luminance: 0.8             // luminance of colors in solid areas
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// global options
-
-NETDATA.options = {
-    pauseCallback: null,            // a callback when we are really paused
-
-    pause: false,                   // when enabled we don't auto-refresh the charts
-
-    targets: [],                    // an array of all the state objects that are
-                                    // currently active (independently of their
-                                    // viewport visibility)
-
-    updated_dom: true,              // when true, the DOM has been updated with
-                                    // new elements we have to check.
-
-    auto_refresher_fast_weight: 0,  // this is the current time in ms, spent
-                                    // rendering charts continuously.
-                                    // used with .current.fast_render_timeframe
-
-    page_is_visible: true,          // when true, this page is visible
-
-    auto_refresher_stop_until: 0,   // timestamp in ms - used internally, to stop the
-                                    // auto-refresher for some time (when a chart is
-                                    // performing pan or zoom, we need to stop refreshing
-                                    // all other charts, to have the maximum speed for
-                                    // rendering the chart that is panned or zoomed).
-                                    // Used with .current.global_pan_sync_time
-
-    on_scroll_refresher_stop_until: 0, // timestamp in ms - used to stop evaluating
-    // charts for some time, after a page scroll
-
-    last_page_resize: Date.now(),   // the timestamp of the last resize request
-
-    last_page_scroll: 0,            // the timestamp the last time the page was scrolled
-
-    browser_timezone: 'unknown',    // timezone detected by javascript
-    server_timezone: 'unknown',     // timezone reported by the server
-
-    force_data_points: 0,           // force the number of points to be returned for charts
-    fake_chart_rendering: false,    // when set to true, the dashboard will download data but will not render the charts
-
-    passive_events: null,           // true if the browser supports passive events
-
-    // the current profile
-    // we may have many...
-    current: {
-        units: 'auto',              // can be 'auto' or 'original'
-        temperature: 'celsius',     // can be 'celsius' or 'fahrenheit'
-        seconds_as_time: true,      // show seconds as DDd:HH:MM:SS ?
-        timezone: 'default',        // the timezone to use, or 'default'
-        user_set_server_timezone: 'default', // as set by the user on the dashboard
-
-        legend_toolbox: true,       // show the legend toolbox on charts
-        resize_charts: true,        // show the resize handler on charts
-
-        pixels_per_point: isSlowDevice() ? 5 : 1, // the minimum pixels per point for all charts
-        // increase this to speed javascript up
-        // each chart library has its own limit too
-        // the max of this and the chart library is used
-        // the final is calculated every time, so a change
-        // here will have immediate effect on the next chart
-        // update
-
-        idle_between_charts: 100,   // ms - how much time to wait between chart updates
-
-        fast_render_timeframe: 200, // ms - render continuously until this time of continuous
-                                    // rendering has been reached
-                                    // this setting is used to make it render e.g. 10
-                                    // charts at once, sleep idle_between_charts time
-                                    // and continue for another 10 charts.
-
-        idle_between_loops: 500,    // ms - if all charts have been updated, wait this
-                                    // time before starting again.
-
-        idle_parallel_loops: 100,   // ms - the time between parallel refresher updates
-
-        idle_lost_focus: 500,       // ms - when the window does not have focus, check
-                                    // if focus has been regained, every this time
-
-        global_pan_sync_time: 300,  // ms - when you pan or zoom a chart, the background
-                                    // auto-refreshing of charts is paused for this amount
-                                    // of time
-
-        sync_selection_delay: 400,  // ms - when you pan or zoom a chart, wait this amount
-                                    // of time before setting up synchronized selections
-                                    // on hover.
-
-        sync_selection: true,       // enable or disable selection sync
-
-        pan_and_zoom_delay: 50,     // when panning or zooming, how ofter to update the chart
-
-        sync_pan_and_zoom: true,    // enable or disable pan and zoom sync
-
-        pan_and_zoom_data_padding: true, // fetch more data for the master chart when panning or zooming
-
-        update_only_visible: true,  // enable or disable visibility management / used for printing
-
-        parallel_refresher: !isSlowDevice(), // enable parallel refresh of charts
-
-        concurrent_refreshes: true, // when parallel_refresher is enabled, sync also the charts
-
-        destroy_on_hide: isSlowDevice(), // destroy charts when they are not visible
-
-        show_help: netdataShowHelp, // when enabled the charts will show some help
-        show_help_delay_show_ms: 500,
-        show_help_delay_hide_ms: 0,
-
-        eliminate_zero_dimensions: true, // do not show dimensions with just zeros
-
-        stop_updates_when_focus_is_lost: true, // boolean - shall we stop auto-refreshes when document does not have user focus
-        stop_updates_while_resizing: 1000,  // ms - time to stop auto-refreshes while resizing the charts
-
-        double_click_speed: 500,    // ms - time between clicks / taps to detect double click/tap
-
-        smooth_plot: !isSlowDevice(), // enable smooth plot, where possible
-
-        color_fill_opacity_line: 1.0,
-        color_fill_opacity_area: 0.2,
-        color_fill_opacity_stacked: 0.8,
-
-        pan_and_zoom_factor: 0.25,      // the increment when panning and zooming with the toolbox
-        pan_and_zoom_factor_multiplier_control: 2.0,
-        pan_and_zoom_factor_multiplier_shift: 3.0,
-        pan_and_zoom_factor_multiplier_alt: 4.0,
-
-        abort_ajax_on_scroll: false,            // kill pending ajax page scroll
-        async_on_scroll: false,                 // sync/async onscroll handler
-        onscroll_worker_duration_threshold: 30, // time in ms, for async scroll handler
-
-        retries_on_data_failures: 3, // how many retries to make if we can't fetch chart data from the server
-
-        setOptionCallback: function () {
-        }
-    },
-
-    debug: {
-        show_boxes: false,
-        main_loop: false,
-        focus: false,
-        visibility: false,
-        chart_data_url: false,
-        chart_errors: true, // remember to set it to false before merging
-        chart_timing: false,
-        chart_calls: false,
-        libraries: false,
-        dygraph: false,
-        globalSelectionSync: false,
-        globalPanAndZoom: false
-    }
-};
-
-NETDATA.statistics = {
-    refreshes_total: 0,
-    refreshes_active: 0,
-    refreshes_active_max: 0
-};
-
-// local storage options
-
-NETDATA.localStorage = {
-    default: {},
-    current: {},
-    callback: {} // only used for resetting back to defaults
-};
-
-NETDATA.localStorageTested = -1;
-NETDATA.localStorageTest = function () {
-    if (NETDATA.localStorageTested !== -1) {
-        return NETDATA.localStorageTested;
-    }
-
-    if (typeof Storage !== "undefined" && typeof localStorage === 'object') {
-        let test = 'test';
-        try {
-            localStorage.setItem(test, test);
-            localStorage.removeItem(test);
-            NETDATA.localStorageTested = true;
-        } catch (e) {
-            NETDATA.localStorageTested = false;
-        }
-    } else {
-        NETDATA.localStorageTested = false;
-    }
-
-    return NETDATA.localStorageTested;
-};
-
-NETDATA.localStorageGet = function (key, def, callback) {
-    let ret = def;
-
-    if (typeof NETDATA.localStorage.default[key.toString()] === 'undefined') {
-        NETDATA.localStorage.default[key.toString()] = def;
-        NETDATA.localStorage.callback[key.toString()] = callback;
-    }
-
-    if (NETDATA.localStorageTest()) {
-        try {
-            // console.log('localStorage: loading "' + key.toString() + '"');
-            ret = localStorage.getItem(key.toString());
-            // console.log('netdata loaded: ' + key.toString() + ' = ' + ret.toString());
-            if (ret === null || ret === 'undefined') {
-                // console.log('localStorage: cannot load it, saving "' + key.toString() + '" with value "' + JSON.stringify(def) + '"');
-                localStorage.setItem(key.toString(), JSON.stringify(def));
-                ret = def;
-            } else {
-                // console.log('localStorage: got "' + key.toString() + '" with value "' + ret + '"');
-                ret = JSON.parse(ret);
-                // console.log('localStorage: loaded "' + key.toString() + '" as value ' + ret + ' of type ' + typeof(ret));
-            }
-        } catch (error) {
-            console.log('localStorage: failed to read "' + key.toString() + '", using default: "' + def.toString() + '"');
-            ret = def;
-        }
-    }
-
-    if (typeof ret === 'undefined' || ret === 'undefined') {
-        console.log('localStorage: LOADED UNDEFINED "' + key.toString() + '" as value ' + ret + ' of type ' + typeof(ret));
-        ret = def;
-    }
-
-    NETDATA.localStorage.current[key.toString()] = ret;
-    return ret;
-};
-
-NETDATA.localStorageSet = function (key, value, callback) {
-    if (typeof value === 'undefined' || value === 'undefined') {
-        console.log('localStorage: ATTEMPT TO SET UNDEFINED "' + key.toString() + '" as value ' + value + ' of type ' + typeof(value));
-    }
-
-    if (typeof NETDATA.localStorage.default[key.toString()] === 'undefined') {
-        NETDATA.localStorage.default[key.toString()] = value;
-        NETDATA.localStorage.current[key.toString()] = value;
-        NETDATA.localStorage.callback[key.toString()] = callback;
-    }
-
-    if (NETDATA.localStorageTest()) {
-        // console.log('localStorage: saving "' + key.toString() + '" with value "' + JSON.stringify(value) + '"');
-        try {
-            localStorage.setItem(key.toString(), JSON.stringify(value));
-        } catch (e) {
-            console.log('localStorage: failed to save "' + key.toString() + '" with value: "' + value.toString() + '"');
-        }
-    }
-
-    NETDATA.localStorage.current[key.toString()] = value;
-    return value;
-};
-
-NETDATA.localStorageGetRecursive = function (obj, prefix, callback) {
-    let keys = Object.keys(obj);
-    let len = keys.length;
-    while (len--) {
-        let i = keys[len];
-
-        if (typeof obj[i] === 'object') {
-            //console.log('object ' + prefix + '.' + i.toString());
-            NETDATA.localStorageGetRecursive(obj[i], prefix + '.' + i.toString(), callback);
-            continue;
-        }
-
-        obj[i] = NETDATA.localStorageGet(prefix + '.' + i.toString(), obj[i], callback);
-    }
-};
-
-NETDATA.setOption = function (key, value) {
-    if (key.toString() === 'setOptionCallback') {
-        if (typeof NETDATA.options.current.setOptionCallback === 'function') {
-            NETDATA.options.current[key.toString()] = value;
-            NETDATA.options.current.setOptionCallback();
-        }
-    } else if (NETDATA.options.current[key.toString()] !== value) {
-        let name = 'options.' + key.toString();
-
-        if (typeof NETDATA.localStorage.default[name.toString()] === 'undefined') {
-            console.log('localStorage: setOption() on unsaved option: "' + name.toString() + '", value: ' + value);
-        }
-
-        //console.log(NETDATA.localStorage);
-        //console.log('setOption: setting "' + key.toString() + '" to "' + value + '" of type ' + typeof(value) + ' original type ' + typeof(NETDATA.options.current[key.toString()]));
-        //console.log(NETDATA.options);
-        NETDATA.options.current[key.toString()] = NETDATA.localStorageSet(name.toString(), value, null);
-
-        if (typeof NETDATA.options.current.setOptionCallback === 'function') {
-            NETDATA.options.current.setOptionCallback();
-        }
-    }
-
-    return true;
-};
-
-NETDATA.getOption = function (key) {
-    return NETDATA.options.current[key.toString()];
-};
-
-// read settings from local storage
-NETDATA.localStorageGetRecursive(NETDATA.options.current, 'options', null);
-
-// always start with this option enabled.
-NETDATA.setOption('stop_updates_when_focus_is_lost', true);
-
-NETDATA.resetOptions = function () {
-    let keys = Object.keys(NETDATA.localStorage.default);
-    let len = keys.length;
-
-    while (len--) {
-        let i = keys[len];
-        let a = i.split('.');
-
-        if (a[0] === 'options') {
-            if (a[1] === 'setOptionCallback') {
-                continue;
-            }
-            if (typeof NETDATA.localStorage.default[i] === 'undefined') {
-                continue;
-            }
-            if (NETDATA.options.current[i] === NETDATA.localStorage.default[i]) {
-                continue;
-            }
-
-            NETDATA.setOption(a[1], NETDATA.localStorage.default[i]);
-        } else if (a[0] === 'chart_heights') {
-            if (typeof NETDATA.localStorage.callback[i] === 'function' && typeof NETDATA.localStorage.default[i] !== 'undefined') {
-                NETDATA.localStorage.callback[i](NETDATA.localStorage.default[i]);
-            }
-        }
-    }
-
-    NETDATA.dateTime.init(NETDATA.options.current.timezone);
-};
-
-// *** src/dashboard.js/timeout.js
-
-// TODO: Better name needed
-
-NETDATA.timeout = {
-    // by default, these are just wrappers to setTimeout() / clearTimeout()
-
-    step: function (callback) {
-        return window.setTimeout(callback, 1000 / 60);
-    },
-
-    set: function (callback, delay) {
-        return window.setTimeout(callback, delay);
-    },
-
-    clear: function (id) {
-        return window.clearTimeout(id);
-    },
-
-    init: function () {
-        let custom = true;
-
-        if (window.requestAnimationFrame) {
-            this.step = function (callback) {
-                return window.requestAnimationFrame(callback);
-            };
-
-            this.clear = function (handle) {
-                return window.cancelAnimationFrame(handle.value);
-            };
-        // } else if (window.webkitRequestAnimationFrame) {
-        //     this.step = function (callback) {
-        //         return window.webkitRequestAnimationFrame(callback);
-        //     };
-
-        //     if (window.webkitCancelAnimationFrame) {
-        //         this.clear = function (handle) {
-        //             return window.webkitCancelAnimationFrame(handle.value);
-        //         };
-        //     } else if (window.webkitCancelRequestAnimationFrame) {
-        //         this.clear = function (handle) {
-        //             return window.webkitCancelRequestAnimationFrame(handle.value);
-        //         };
-        //     }
-        // } else if (window.mozRequestAnimationFrame) {
-        //     this.step = function (callback) {
-        //         return window.mozRequestAnimationFrame(callback);
-        //     };
-
-        //     this.clear = function (handle) {
-        //         return window.mozCancelRequestAnimationFrame(handle.value);
-        //     };
-        // } else if (window.oRequestAnimationFrame) {
-        //     this.step = function (callback) {
-        //         return window.oRequestAnimationFrame(callback);
-        //     };
-
-        //     this.clear = function (handle) {
-        //         return window.oCancelRequestAnimationFrame(handle.value);
-        //     };
-        // } else if (window.msRequestAnimationFrame) {
-        //     this.step = function (callback) {
-        //         return window.msRequestAnimationFrame(callback);
-        //     };
-
-        //     this.clear = function (handle) {
-        //         return window.msCancelRequestAnimationFrame(handle.value);
-        //     };
-        } else {
-            custom = false;
-        }
-
-        if (custom) {
-            // we have installed custom .step() / .clear() functions
-            // overwrite the .set() too
-
-            this.set = function (callback, delay) {
-                let start = Date.now(),
-                    handle = new Object();
-
-                const loop = () => {
-                    let current = Date.now(),
-                        delta = current - start;
-
-                    if (delta >= delay) {
-                        callback.call();
-                    } else {
-                        handle.value = this.step(loop);
-                    }
-                }
-
-                handle.value = this.step(loop);
-                return handle;
-            };
-        }
-    }
-};
-
-NETDATA.timeout.init();
-// Codacy declarations
-/* global netdataTheme */
-
-NETDATA.themes = {
-    white: {
-        bootstrap_css: NETDATA.serverStatic + 'css/bootstrap-3.3.7.css',
-        dashboard_css: NETDATA.serverStatic + 'dashboard.css?v20190902-0',
-        background: '#FFFFFF',
-        foreground: '#000000',
-        grid: '#F0F0F0',
-        axis: '#F0F0F0',
-        highlight: '#F5F5F5',
-        colors: ['#3366CC', '#DC3912', '#109618', '#FF9900', '#990099', '#DD4477',
-            '#3B3EAC', '#66AA00', '#0099C6', '#B82E2E', '#AAAA11', '#5574A6',
-            '#994499', '#22AA99', '#6633CC', '#E67300', '#316395', '#8B0707',
-            '#329262', '#3B3EAC'],
-        easypiechart_track: '#f0f0f0',
-        easypiechart_scale: '#dfe0e0',
-        gauge_pointer: '#C0C0C0',
-        gauge_stroke: '#F0F0F0',
-        gauge_gradient: false,
-        d3pie: {
-            title: '#333333',
-            subtitle: '#666666',
-            footer: '#888888',
-            other: '#aaaaaa',
-            mainlabel: '#333333',
-            percentage: '#dddddd',
-            value: '#aaaa22',
-            tooltip_bg: '#000000',
-            tooltip_fg: '#efefef',
-            segment_stroke: "#ffffff",
-            gradient_color: '#000000'
-        }
-    },
-    slate: {
-        bootstrap_css: NETDATA.serverStatic + 'css/bootstrap-slate-flat-3.3.7.css?v20161229-1',
-        dashboard_css: NETDATA.serverStatic + 'dashboard.slate.css?v20190902-0',
-        background: '#272b30',
-        foreground: '#C8C8C8',
-        grid: '#283236',
-        axis: '#283236',
-        highlight: '#383838',
-        /*          colors: [   '#55bb33', '#ff2222',   '#0099C6', '#faa11b',   '#adbce0', '#DDDD00',
-                            '#4178ba', '#f58122',   '#a5cc39', '#f58667',   '#f5ef89', '#cf93c0',
-                            '#a5d18a', '#b8539d',   '#3954a3', '#c8a9cf',   '#c7de8a', '#fad20a',
-                            '#a6a479', '#a66da8' ],
-        */
-        colors: ['#66AA00', '#FE3912', '#3366CC', '#D66300', '#0099C6', '#DDDD00',
-            '#5054e6', '#EE9911', '#BB44CC', '#e45757', '#ef0aef', '#CC7700',
-            '#22AA99', '#109618', '#905bfd', '#f54882', '#4381bf', '#ff3737',
-            '#329262', '#3B3EFF'],
-        easypiechart_track: '#373b40',
-        easypiechart_scale: '#373b40',
-        gauge_pointer: '#474b50',
-        gauge_stroke: '#373b40',
-        gauge_gradient: false,
-        d3pie: {
-            title: '#C8C8C8',
-            subtitle: '#283236',
-            footer: '#283236',
-            other: '#283236',
-            mainlabel: '#C8C8C8',
-            percentage: '#dddddd',
-            value: '#cccc44',
-            tooltip_bg: '#272b30',
-            tooltip_fg: '#C8C8C8',
-            segment_stroke: "#283236",
-            gradient_color: '#000000'
-        }
-    }
-};
-
-if (typeof netdataTheme !== 'undefined' && typeof NETDATA.themes[netdataTheme] !== 'undefined') {
-    NETDATA.themes.current = NETDATA.themes[netdataTheme];
-} else {
-    NETDATA.themes.current = NETDATA.themes.white;
-}
-
-NETDATA.colors = NETDATA.themes.current.colors;
-
-// these are the colors Google Charts are using
-// we have them here to attempt emulate their look and feel on the other chart libraries
-// http://there4.io/2012/05/02/google-chart-color-list/
-//NETDATA.colors        = [ '#3366CC', '#DC3912', '#FF9900', '#109618', '#990099', '#3B3EAC', '#0099C6',
-//                      '#DD4477', '#66AA00', '#B82E2E', '#316395', '#994499', '#22AA99', '#AAAA11',
-//                      '#6633CC', '#E67300', '#8B0707', '#329262', '#5574A6', '#3B3EAC' ];
-
-// an alternative set
-// http://www.mulinblog.com/a-color-palette-optimized-for-data-visualization/
-//                         (blue)     (red)      (orange)   (green)    (pink)     (brown)    (purple)   (yellow)   (gray)
-//NETDATA.colors        = [ '#5DA5DA', '#F15854', '#FAA43A', '#60BD68', '#F17CB0', '#B2912F', '#B276B2', '#DECF3F', '#4D4D4D' ];
-// dygraph
-
-// Codacy declarations
-/* global smoothPlotter */
-/* global Dygraph */
-
-NETDATA.dygraph = {
-    smooth: false
-};
-
-NETDATA.dygraphToolboxPanAndZoom = function (state, after, before) {
-    if (after < state.netdata_first) {
-        after = state.netdata_first;
-    }
-
-    if (before > state.netdata_last) {
-        before = state.netdata_last;
-    }
-
-    state.setMode('zoom');
-    NETDATA.globalSelectionSync.stop();
-    NETDATA.globalSelectionSync.delay();
-    state.tmp.dygraph_user_action = true;
-    state.tmp.dygraph_force_zoom = true;
-    // state.log('toolboxPanAndZoom');
-    state.updateChartPanOrZoom(after, before);
-    NETDATA.globalPanAndZoom.setMaster(state, after, before);
-};
-
-NETDATA.dygraphSetSelection = function (state, t) {
-    if (typeof state.tmp.dygraph_instance !== 'undefined') {
-        let r = state.calculateRowForTime(t);
-        if (r !== -1) {
-            state.tmp.dygraph_instance.setSelection(r);
-            return true;
-        } else {
-            state.tmp.dygraph_instance.clearSelection();
-            state.legendShowUndefined();
-        }
-    }
-
-    return false;
-};
-
-NETDATA.dygraphClearSelection = function (state) {
-    if (typeof state.tmp.dygraph_instance !== 'undefined') {
-        state.tmp.dygraph_instance.clearSelection();
-    }
-    return true;
-};
-
-NETDATA.dygraphSmoothInitialize = function (callback) {
-    $.ajax({
-        url: NETDATA.dygraph_smooth_js,
-        cache: true,
-        dataType: "script",
-        xhrFields: {withCredentials: true} // required for the cookie
-    })
-        .done(function () {
-            NETDATA.dygraph.smooth = true;
-            smoothPlotter.smoothing = 0.3;
-        })
-        .fail(function () {
-            NETDATA.dygraph.smooth = false;
-        })
-        .always(function () {
-            if (typeof callback === "function") {
-                return callback();
-            }
-        });
-};
-
-NETDATA.dygraphInitialize = function (callback) {
-    if (typeof netdataNoDygraphs === 'undefined' || !netdataNoDygraphs) {
-        $.ajax({
-            url: NETDATA.dygraph_js,
-            cache: true,
-            dataType: "script",
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function () {
-                NETDATA.registerChartLibrary('dygraph', NETDATA.dygraph_js);
-            })
-            .fail(function () {
-                NETDATA.chartLibraries.dygraph.enabled = false;
-                NETDATA.error(100, NETDATA.dygraph_js);
-            })
-            .always(function () {
-                if (NETDATA.chartLibraries.dygraph.enabled && NETDATA.options.current.smooth_plot) {
-                    NETDATA.dygraphSmoothInitialize(callback);
-                } else if (typeof callback === "function") {
-                    return callback();
-                }
-            });
-    } else {
-        NETDATA.chartLibraries.dygraph.enabled = false;
-        if (typeof callback === "function") {
-            return callback();
-        }
-    }
-};
-
-NETDATA.dygraphChartUpdate = function (state, data) {
-    let dygraph = state.tmp.dygraph_instance;
-
-    if (typeof dygraph === 'undefined') {
-        return NETDATA.dygraphChartCreate(state, data);
-    }
-
-    // when the chart is not visible, and hidden
-    // if there is a window resize, dygraph detects
-    // its element size as 0x0.
-    // this will make it re-appear properly
-
-    if (state.tm.last_unhidden > state.tmp.dygraph_last_rendered) {
-        dygraph.resize();
-    }
-
-    let options = {
-        file: data.result.data,
-        colors: state.chartColors(),
-        labels: data.result.labels,
-        //labelsDivWidth: state.chartWidth() - 70,
-        includeZero: state.tmp.dygraph_include_zero,
-        visibility: state.dimensions_visibility.selected2BooleanArray(state.data.dimension_names)
-    };
-
-    if (state.tmp.dygraph_chart_type === 'stacked') {
-        if (options.includeZero && state.dimensions_visibility.countSelected() < options.visibility.length) {
-            options.includeZero = 0;
-        }
-    }
-
-    if (!NETDATA.chartLibraries.dygraph.isSparkline(state)) {
-        options.ylabel = state.units_current; // (state.units_desired === 'auto')?"":state.units_current;
-    }
-
-    if (state.tmp.dygraph_force_zoom) {
-        if (NETDATA.options.debug.dygraph || state.debug) {
-            state.log('dygraphChartUpdate() forced zoom update');
-        }
-
-        options.dateWindow = (state.requested_padding !== null) ? [state.view_after, state.view_before] : null;
-        //options.isZoomedIgnoreProgrammaticZoom = true;
-        state.tmp.dygraph_force_zoom = false;
-    } else if (state.current.name !== 'auto') {
-        if (NETDATA.options.debug.dygraph || state.debug) {
-            state.log('dygraphChartUpdate() loose update');
-        }
-    } else {
-        if (NETDATA.options.debug.dygraph || state.debug) {
-            state.log('dygraphChartUpdate() strict update');
-        }
-
-        options.dateWindow = (state.requested_padding !== null) ? [state.view_after, state.view_before] : null;
-        //options.isZoomedIgnoreProgrammaticZoom = true;
-    }
-
-    options.valueRange = state.tmp.dygraph_options.valueRange;
-
-    let oldMax = null, oldMin = null;
-    if (state.tmp.__commonMin !== null) {
-        state.data.min = state.tmp.dygraph_instance.axes_[0].extremeRange[0];
-        oldMin = options.valueRange[0] = NETDATA.commonMin.get(state);
-    }
-    if (state.tmp.__commonMax !== null) {
-        state.data.max = state.tmp.dygraph_instance.axes_[0].extremeRange[1];
-        oldMax = options.valueRange[1] = NETDATA.commonMax.get(state);
-    }
-
-    if (state.tmp.dygraph_smooth_eligible) {
-        if ((NETDATA.options.current.smooth_plot && state.tmp.dygraph_options.plotter !== smoothPlotter)
-            || (NETDATA.options.current.smooth_plot === false && state.tmp.dygraph_options.plotter === smoothPlotter)) {
-            NETDATA.dygraphChartCreate(state, data);
-            return;
-        }
-    }
-
-    if (netdataSnapshotData !== null && NETDATA.globalPanAndZoom.isActive() && NETDATA.globalPanAndZoom.isMaster(state) === false) {
-        // pan and zoom on snapshots
-        options.dateWindow = [NETDATA.globalPanAndZoom.force_after_ms, NETDATA.globalPanAndZoom.force_before_ms];
-        //options.isZoomedIgnoreProgrammaticZoom = true;
-    }
-
-    if (NETDATA.chartLibraries.dygraph.isLogScale(state)) {
-        if (Array.isArray(options.valueRange) && options.valueRange[0] <= 0) {
-            options.valueRange[0] = null;
-        }
-    }
-
-    dygraph.updateOptions(options);
-
-    let redraw = false;
-    if (oldMin !== null && oldMin > state.tmp.dygraph_instance.axes_[0].extremeRange[0]) {
-        state.data.min = state.tmp.dygraph_instance.axes_[0].extremeRange[0];
-        options.valueRange[0] = NETDATA.commonMin.get(state);
-        redraw = true;
-    }
-    if (oldMax !== null && oldMax < state.tmp.dygraph_instance.axes_[0].extremeRange[1]) {
-        state.data.max = state.tmp.dygraph_instance.axes_[0].extremeRange[1];
-        options.valueRange[1] = NETDATA.commonMax.get(state);
-        redraw = true;
-    }
-
-    if (redraw) {
-        // state.log('forcing redraw to adapt to common- min/max');
-        dygraph.updateOptions(options);
-    }
-
-    state.tmp.dygraph_last_rendered = Date.now();
-    return true;
-};
-
-NETDATA.dygraphChartCreate = function (state, data) {
-    if (NETDATA.options.debug.dygraph || state.debug) {
-        state.log('dygraphChartCreate()');
-    }
-
-    state.tmp.dygraph_chart_type = NETDATA.dataAttribute(state.element, 'dygraph-type', state.chart.chart_type);
-    if (state.tmp.dygraph_chart_type === 'stacked' && data.dimensions === 1) {
-        state.tmp.dygraph_chart_type = 'area';
-    }
-    if (state.tmp.dygraph_chart_type === 'stacked' && NETDATA.chartLibraries.dygraph.isLogScale(state)) {
-        state.tmp.dygraph_chart_type = 'area';
-    }
-
-    let highlightCircleSize = NETDATA.chartLibraries.dygraph.isSparkline(state) ? 3 : 4;
-
-    let smooth = NETDATA.dygraph.smooth
-        ? (NETDATA.dataAttributeBoolean(state.element, 'dygraph-smooth', (state.tmp.dygraph_chart_type === 'line' && NETDATA.chartLibraries.dygraph.isSparkline(state) === false)))
-        : false;
-
-    state.tmp.dygraph_include_zero = NETDATA.dataAttribute(state.element, 'dygraph-includezero', (state.tmp.dygraph_chart_type === 'stacked'));
-    let drawAxis = NETDATA.dataAttributeBoolean(state.element, 'dygraph-drawaxis', true);
-
-    state.tmp.dygraph_options = {
-        colors: NETDATA.dataAttribute(state.element, 'dygraph-colors', state.chartColors()),
-
-        // leave a few pixels empty on the right of the chart
-        rightGap: NETDATA.dataAttribute(state.element, 'dygraph-rightgap', 5),
-        showRangeSelector: NETDATA.dataAttributeBoolean(state.element, 'dygraph-showrangeselector', false),
-        showRoller: NETDATA.dataAttributeBoolean(state.element, 'dygraph-showroller', false),
-        title: NETDATA.dataAttribute(state.element, 'dygraph-title', state.title),
-        titleHeight: NETDATA.dataAttribute(state.element, 'dygraph-titleheight', 19),
-        legend: NETDATA.dataAttribute(state.element, 'dygraph-legend', 'always'), // we need this to get selection events
-        labels: data.result.labels,
-        labelsDiv: NETDATA.dataAttribute(state.element, 'dygraph-labelsdiv', state.element_legend_childs.hidden),
-        //labelsDivStyles:        NETDATA.dataAttribute(state.element, 'dygraph-labelsdivstyles', { 'fontSize':'1px' }),
-        //labelsDivWidth:         NETDATA.dataAttribute(state.element, 'dygraph-labelsdivwidth', state.chartWidth() - 70),
-        labelsSeparateLines: NETDATA.dataAttributeBoolean(state.element, 'dygraph-labelsseparatelines', true),
-        labelsShowZeroValues: NETDATA.chartLibraries.dygraph.isLogScale(state) ? false : NETDATA.dataAttributeBoolean(state.element, 'dygraph-labelsshowzerovalues', true),
-        labelsKMB: false,
-        labelsKMG2: false,
-        showLabelsOnHighlight: NETDATA.dataAttributeBoolean(state.element, 'dygraph-showlabelsonhighlight', true),
-        hideOverlayOnMouseOut: NETDATA.dataAttributeBoolean(state.element, 'dygraph-hideoverlayonmouseout', true),
-        includeZero: state.tmp.dygraph_include_zero,
-        xRangePad: NETDATA.dataAttribute(state.element, 'dygraph-xrangepad', 0),
-        yRangePad: NETDATA.dataAttribute(state.element, 'dygraph-yrangepad', 1),
-        valueRange: NETDATA.dataAttribute(state.element, 'dygraph-valuerange', [null, null]),
-        ylabel: state.units_current, // (state.units_desired === 'auto')?"":state.units_current,
-        yLabelWidth: NETDATA.dataAttribute(state.element, 'dygraph-ylabelwidth', 12),
-
-        // the function to plot the chart
-        plotter: null,
-
-        // The width of the lines connecting data points.
-        // This can be used to increase the contrast or some graphs.
-        strokeWidth: NETDATA.dataAttribute(state.element, 'dygraph-strokewidth', ((state.tmp.dygraph_chart_type === 'stacked') ? 0.1 : ((smooth === true) ? 1.5 : 0.7))),
-        strokePattern: NETDATA.dataAttribute(state.element, 'dygraph-strokepattern', undefined),
-
-        // The size of the dot to draw on each point in pixels (see drawPoints).
-        // A dot is always drawn when a point is "isolated",
-        // i.e. there is a missing point on either side of it.
-        // This also controls the size of those dots.
-        drawPoints: NETDATA.dataAttributeBoolean(state.element, 'dygraph-drawpoints', false),
-
-        // Draw points at the edges of gaps in the data.
-        // This improves visibility of small data segments or other data irregularities.
-        drawGapEdgePoints: NETDATA.dataAttributeBoolean(state.element, 'dygraph-drawgapedgepoints', true),
-        connectSeparatedPoints: NETDATA.chartLibraries.dygraph.isLogScale(state) ? false : NETDATA.dataAttributeBoolean(state.element, 'dygraph-connectseparatedpoints', false),
-        pointSize: NETDATA.dataAttribute(state.element, 'dygraph-pointsize', 1),
-
-        // enabling this makes the chart with little square lines
-        stepPlot: NETDATA.dataAttributeBoolean(state.element, 'dygraph-stepplot', false),
-
-        // Draw a border around graph lines to make crossing lines more easily
-        // distinguishable. Useful for graphs with many lines.
-        strokeBorderColor: NETDATA.dataAttribute(state.element, 'dygraph-strokebordercolor', NETDATA.themes.current.background),
-        strokeBorderWidth: NETDATA.dataAttribute(state.element, 'dygraph-strokeborderwidth', (state.tmp.dygraph_chart_type === 'stacked') ? 0.0 : 0.0),
-        fillGraph: NETDATA.dataAttribute(state.element, 'dygraph-fillgraph', (state.tmp.dygraph_chart_type === 'area' || state.tmp.dygraph_chart_type === 'stacked')),
-        fillAlpha: NETDATA.dataAttribute(state.element, 'dygraph-fillalpha',
-            ((state.tmp.dygraph_chart_type === 'stacked')
-                ? NETDATA.options.current.color_fill_opacity_stacked
-                : NETDATA.options.current.color_fill_opacity_area)
-        ),
-        stackedGraph: NETDATA.dataAttribute(state.element, 'dygraph-stackedgraph', (state.tmp.dygraph_chart_type === 'stacked')),
-        stackedGraphNaNFill: NETDATA.dataAttribute(state.element, 'dygraph-stackedgraphnanfill', 'none'),
-        drawAxis: drawAxis,
-        axisLabelFontSize: NETDATA.dataAttribute(state.element, 'dygraph-axislabelfontsize', 10),
-        axisLineColor: NETDATA.dataAttribute(state.element, 'dygraph-axislinecolor', NETDATA.themes.current.axis),
-        axisLineWidth: NETDATA.dataAttribute(state.element, 'dygraph-axislinewidth', 1.0),
-        drawGrid: NETDATA.dataAttributeBoolean(state.element, 'dygraph-drawgrid', true),
-        gridLinePattern: NETDATA.dataAttribute(state.element, 'dygraph-gridlinepattern', null),
-        gridLineWidth: NETDATA.dataAttribute(state.element, 'dygraph-gridlinewidth', 1.0),
-        gridLineColor: NETDATA.dataAttribute(state.element, 'dygraph-gridlinecolor', NETDATA.themes.current.grid),
-        maxNumberWidth: NETDATA.dataAttribute(state.element, 'dygraph-maxnumberwidth', 8),
-        sigFigs: NETDATA.dataAttribute(state.element, 'dygraph-sigfigs', null),
-        digitsAfterDecimal: NETDATA.dataAttribute(state.element, 'dygraph-digitsafterdecimal', 2),
-        valueFormatter: NETDATA.dataAttribute(state.element, 'dygraph-valueformatter', undefined),
-        highlightCircleSize: NETDATA.dataAttribute(state.element, 'dygraph-highlightcirclesize', highlightCircleSize),
-        highlightSeriesOpts: NETDATA.dataAttribute(state.element, 'dygraph-highlightseriesopts', null), // TOO SLOW: { strokeWidth: 1.5 },
-        highlightSeriesBackgroundAlpha: NETDATA.dataAttribute(state.element, 'dygraph-highlightseriesbackgroundalpha', null), // TOO SLOW: (state.tmp.dygraph_chart_type === 'stacked')?0.7:0.5,
-        pointClickCallback: NETDATA.dataAttribute(state.element, 'dygraph-pointclickcallback', undefined),
-        visibility: state.dimensions_visibility.selected2BooleanArray(state.data.dimension_names),
-        logscale: NETDATA.chartLibraries.dygraph.isLogScale(state) ? 'y' : undefined,
-
-        // Expects a string in the format "<series name>: <style>" where each series is separated by a |
-        perSeriesStyle: NETDATA.dataAttribute(state.element, 'dygraph-per-series-style', ''),
-
-        axes: {
-            x: {
-                pixelsPerLabel: NETDATA.dataAttribute(state.element, 'dygraph-xpixelsperlabel', 50),
-                ticker: Dygraph.dateTicker,
-                axisLabelWidth: NETDATA.dataAttribute(state.element, 'dygraph-xaxislabelwidth', 60),
-                drawAxis: NETDATA.dataAttributeBoolean(state.element, 'dygraph-drawxaxis', drawAxis),
-                axisLabelFormatter: function (d, gran) {
-                    void(gran);
-                    return NETDATA.dateTime.xAxisTimeString(d);
-                }
-            },
-            y: {
-                logscale: NETDATA.chartLibraries.dygraph.isLogScale(state) ? true : undefined,
-                pixelsPerLabel: NETDATA.dataAttribute(state.element, 'dygraph-ypixelsperlabel', 15),
-                axisLabelWidth: NETDATA.dataAttribute(state.element, 'dygraph-yaxislabelwidth', 50),
-                drawAxis: NETDATA.dataAttributeBoolean(state.element, 'dygraph-drawyaxis', drawAxis),
-                axisLabelFormatter: function (y) {
-
-                    // unfortunately, we have to call this every single time
-                    state.legendFormatValueDecimalsFromMinMax(
-                        this.axes_[0].extremeRange[0],
-                        this.axes_[0].extremeRange[1]
-                    );
-
-                    let old_units = this.user_attrs_.ylabel;
-                    let v = state.legendFormatValue(y);
-                    let new_units = state.units_current;
-
-                    if (state.units_desired === 'auto' && typeof old_units !== 'undefined' && new_units !== old_units && !NETDATA.chartLibraries.dygraph.isSparkline(state)) {
-                        // console.log(this);
-                        // state.log('units discrepancy: old = ' + old_units + ', new = ' + new_units);
-                        let len = this.plugins_.length;
-                        while (len--) {
-                            // console.log(this.plugins_[len]);
-                            if (typeof this.plugins_[len].plugin.ylabel_div_ !== 'undefined'
-                                && this.plugins_[len].plugin.ylabel_div_ !== null
-                                && typeof this.plugins_[len].plugin.ylabel_div_.children !== 'undefined'
-                                && this.plugins_[len].plugin.ylabel_div_.children !== null
-                                && typeof this.plugins_[len].plugin.ylabel_div_.children[0].children !== 'undefined'
-                                && this.plugins_[len].plugin.ylabel_div_.children[0].children !== null
-                            ) {
-                                this.plugins_[len].plugin.ylabel_div_.children[0].children[0].innerHTML = new_units;
-                                this.user_attrs_.ylabel = new_units;
-                                break;
-                            }
-                        }
-
-                        if (len < 0) {
-                            state.log('units discrepancy, but cannot find dygraphs div to change: old = ' + old_units + ', new = ' + new_units);
-                        }
-                    }
-
-                    return v;
-                }
-            }
-        },
-        legendFormatter: function (data) {
-            if (state.tmp.dygraph_mouse_down) {
-                return;
-            }
-
-            let elements = state.element_legend_childs;
-
-            // if the hidden div is not there
-            // we are not managing the legend
-            if (elements.hidden === null) {
-                return;
-            }
-
-            if (typeof data.x !== 'undefined') {
-                state.legendSetDate(data.x);
-                let i = data.series.length;
-                while (i--) {
-                    let series = data.series[i];
-                    if (series.isVisible) {
-                        state.legendSetLabelValue(series.label, series.y);
-                    } else {
-                        state.legendSetLabelValue(series.label, null);
-                    }
-                }
-            }
-
-            return '';
-        },
-        drawCallback: function (dygraph, is_initial) {
-
-            // the user has panned the chart and this is called to re-draw the chart
-            // 1. refresh this chart by adding data to it
-            // 2. notify all the other charts about the update they need
-
-            // to prevent an infinite loop (feedback), we use
-            //     state.tmp.dygraph_user_action
-            // - when true, this is initiated by a user
-            // - when false, this is feedback
-
-            if (state.current.name !== 'auto' && state.tmp.dygraph_user_action) {
-                state.tmp.dygraph_user_action = false;
-
-                let x_range = dygraph.xAxisRange();
-                let after = Math.round(x_range[0]);
-                let before = Math.round(x_range[1]);
-
-                if (NETDATA.options.debug.dygraph) {
-                    state.log('dygraphDrawCallback(dygraph, ' + is_initial + '): mode ' + state.current.name + ' ' + (after / 1000).toString() + ' - ' + (before / 1000).toString());
-                    //console.log(state);
-                }
-
-                if (before <= state.netdata_last && after >= state.netdata_first) {
-                    // update only when we are within the data limits
-                    state.updateChartPanOrZoom(after, before);
-                }
-            }
-        },
-        zoomCallback: function (minDate, maxDate, yRanges) {
-
-            // the user has selected a range on the chart
-            // 1. refresh this chart by adding data to it
-            // 2. notify all the other charts about the update they need
-
-            void(yRanges);
-
-            if (NETDATA.options.debug.dygraph) {
-                state.log('dygraphZoomCallback(): ' + state.current.name);
-            }
-
-            NETDATA.globalSelectionSync.stop();
-            NETDATA.globalSelectionSync.delay();
-            state.setMode('zoom');
-
-            // refresh it to the greatest possible zoom level
-            state.tmp.dygraph_user_action = true;
-            state.tmp.dygraph_force_zoom = true;
-            state.updateChartPanOrZoom(minDate, maxDate);
-        },
-        highlightCallback: function (event, x, points, row, seriesName) {
-            void(seriesName);
-
-            state.pauseChart();
-
-            // there is a bug in dygraph when the chart is zoomed enough
-            // the time it thinks is selected is wrong
-            // here we calculate the time t based on the row number selected
-            // which is ok
-            // let t = state.data_after + row * state.data_update_every;
-            // console.log('row = ' + row + ', x = ' + x + ', t = ' + t + ' ' + ((t === x)?'SAME':(Math.abs(x-t)<=state.data_update_every)?'SIMILAR':'DIFFERENT') + ', rows in db: ' + state.data_points + ' visible(x) = ' + state.timeIsVisible(x) + ' visible(t) = ' + state.timeIsVisible(t) + ' r(x) = ' + state.calculateRowForTime(x) + ' r(t) = ' + state.calculateRowForTime(t) + ' range: ' + state.data_after + ' - ' + state.data_before + ' real: ' + state.data.after + ' - ' + state.data.before + ' every: ' + state.data_update_every);
-
-            if (state.tmp.dygraph_mouse_down !== true) {
-                NETDATA.globalSelectionSync.sync(state, x);
-            }
-
-            // fix legend zIndex using the internal structures of dygraph legend module
-            // this works, but it is a hack!
-            // state.tmp.dygraph_instance.plugins_[0].plugin.legend_div_.style.zIndex = 10000;
-        },
-        unhighlightCallback: function (event) {
-            void(event);
-
-            if (state.tmp.dygraph_mouse_down) {
-                return;
-            }
-
-            if (NETDATA.options.debug.dygraph || state.debug) {
-                state.log('dygraphUnhighlightCallback()');
-            }
-
-            state.unpauseChart();
-            NETDATA.globalSelectionSync.stop();
-        },
-        underlayCallback: function (canvas, area, g) {
-            // the chart is about to be drawn
-
-            // update history_tip_element
-            if (state.tmp.dygraph_history_tip_element) {
-                const xHookRightSide = g.toDomXCoord(state.netdata_first);
-                if (xHookRightSide > area.x) {
-                    state.tmp.dygraph_history_tip_element_displayed = true;
-                    // group the styles for possible better performance
-                    state.tmp.dygraph_history_tip_element.setAttribute(
-                      'style',
-                      `display: block; left: ${area.x}px; right: calc(100% - ${xHookRightSide}px);`
-                    )
-                } else {
-                    if (state.tmp.dygraph_history_tip_element_displayed) {
-                        // additional check just for performance
-                        // don't update the DOM when it's not needed
-                        state.tmp.dygraph_history_tip_element.style.display = 'none';
-                        state.tmp.dygraph_history_tip_element_displayed = false;
-                    }
-                }
-            }
-
-            // this function renders global highlighted time-frame
-
-            if (NETDATA.globalChartUnderlay.isActive()) {
-                let after = NETDATA.globalChartUnderlay.after;
-                let before = NETDATA.globalChartUnderlay.before;
-
-                if (after < state.view_after) {
-                    after = state.view_after;
-                }
-
-                if (before > state.view_before) {
-                    before = state.view_before;
-                }
-
-                if (after < before) {
-                    let bottom_left = g.toDomCoords(after, -20);
-                    let top_right = g.toDomCoords(before, +20);
-
-                    let left = bottom_left[0];
-                    let right = top_right[0];
-
-                    canvas.fillStyle = NETDATA.themes.current.highlight;
-                    canvas.fillRect(left, area.y, right - left, area.h);
-                }
-            }
-        },
-        interactionModel: {
-            mousedown: function (event, dygraph, context) {
-                if (NETDATA.options.debug.dygraph || state.debug) {
-                    state.log('interactionModel.mousedown()');
-                }
-
-                state.tmp.dygraph_user_action = true;
-
-                if (NETDATA.options.debug.dygraph) {
-                    state.log('dygraphMouseDown()');
-                }
-
-                // Right-click should not initiate anything.
-                if (event.button && event.button === 2) {
-                    return;
-                }
-
-                NETDATA.globalSelectionSync.stop();
-                NETDATA.globalSelectionSync.delay();
-
-                state.tmp.dygraph_mouse_down = true;
-                context.initializeMouseDown(event, dygraph, context);
-
-                //console.log(event);
-                if (event.button && event.button === 1) {
-                    if (event.shiftKey) {
-                        //console.log('middle mouse button dragging (PAN)');
-
-                        state.setMode('pan');
-                        // NETDATA.globalSelectionSync.delay();
-                        state.tmp.dygraph_highlight_after = null;
-                        Dygraph.startPan(event, dygraph, context);
-                    } else if (event.altKey || event.ctrlKey || event.metaKey) {
-                        //console.log('middle mouse button highlight');
-
-                        if (!(event.offsetX && event.offsetY)) {
-                            event.offsetX = event.layerX - event.target.offsetLeft;
-                            event.offsetY = event.layerY - event.target.offsetTop;
-                        }
-                        state.tmp.dygraph_highlight_after = dygraph.toDataXCoord(event.offsetX);
-                        Dygraph.startZoom(event, dygraph, context);
-                    } else {
-                        //console.log('middle mouse button selection for zoom (ZOOM)');
-
-                        state.setMode('zoom');
-                        // NETDATA.globalSelectionSync.delay();
-                        state.tmp.dygraph_highlight_after = null;
-                        Dygraph.startZoom(event, dygraph, context);
-                    }
-                } else {
-                    if (event.shiftKey) {
-                        //console.log('left mouse button selection for zoom (ZOOM)');
-
-                        state.setMode('zoom');
-                        // NETDATA.globalSelectionSync.delay();
-                        state.tmp.dygraph_highlight_after = null;
-                        Dygraph.startZoom(event, dygraph, context);
-                    } else if (event.altKey || event.ctrlKey || event.metaKey) {
-                        //console.log('left mouse button highlight');
-
-                        if (!(event.offsetX && event.offsetY)) {
-                            event.offsetX = event.layerX - event.target.offsetLeft;
-                            event.offsetY = event.layerY - event.target.offsetTop;
-                        }
-                        state.tmp.dygraph_highlight_after = dygraph.toDataXCoord(event.offsetX);
-                        Dygraph.startZoom(event, dygraph, context);
-                    } else {
-                        //console.log('left mouse button dragging (PAN)');
-
-                        state.setMode('pan');
-                        // NETDATA.globalSelectionSync.delay();
-                        state.tmp.dygraph_highlight_after = null;
-                        Dygraph.startPan(event, dygraph, context);
-                    }
-                }
-            },
-            mousemove: function (event, dygraph, context) {
-                if (NETDATA.options.debug.dygraph || state.debug) {
-                    state.log('interactionModel.mousemove()');
-                }
-
-                if (state.tmp.dygraph_highlight_after !== null) {
-                    //console.log('highlight selection...');
-
-                    NETDATA.globalSelectionSync.stop();
-                    NETDATA.globalSelectionSync.delay();
-
-                    state.tmp.dygraph_user_action = true;
-                    Dygraph.moveZoom(event, dygraph, context);
-                    event.preventDefault();
-                } else if (context.isPanning) {
-                    //console.log('panning...');
-
-                    NETDATA.globalSelectionSync.stop();
-                    NETDATA.globalSelectionSync.delay();
-
-                    state.tmp.dygraph_user_action = true;
-                    //NETDATA.globalSelectionSync.stop();
-                    //NETDATA.globalSelectionSync.delay();
-                    state.setMode('pan');
-                    context.is2DPan = false;
-                    Dygraph.movePan(event, dygraph, context);
-                } else if (context.isZooming) {
-                    //console.log('zooming...');
-
-                    NETDATA.globalSelectionSync.stop();
-                    NETDATA.globalSelectionSync.delay();
-
-                    state.tmp.dygraph_user_action = true;
-                    //NETDATA.globalSelectionSync.stop();
-                    //NETDATA.globalSelectionSync.delay();
-                    state.setMode('zoom');
-                    Dygraph.moveZoom(event, dygraph, context);
-                }
-            },
-            mouseup: function (event, dygraph, context) {
-                state.tmp.dygraph_mouse_down = false;
-
-                if (NETDATA.options.debug.dygraph || state.debug) {
-                    state.log('interactionModel.mouseup()');
-                }
-
-                if (state.tmp.dygraph_highlight_after !== null) {
-                    //console.log('done highlight selection');
-
-                    NETDATA.globalSelectionSync.stop();
-                    NETDATA.globalSelectionSync.delay();
-
-                    if (!(event.offsetX && event.offsetY)) {
-                        event.offsetX = event.layerX - event.target.offsetLeft;
-                        event.offsetY = event.layerY - event.target.offsetTop;
-                    }
-
-                    NETDATA.globalChartUnderlay.set(state
-                        , state.tmp.dygraph_highlight_after
-                        , dygraph.toDataXCoord(event.offsetX)
-                        , state.view_after
-                        , state.view_before
-                    );
-
-                    state.tmp.dygraph_highlight_after = null;
-
-                    context.isZooming = false;
-                    dygraph.clearZoomRect_();
-                    dygraph.drawGraph_(false);
-
-                    // refresh all the charts immediately
-                    NETDATA.options.auto_refresher_stop_until = 0;
-                } else if (context.isPanning) {
-                    //console.log('done panning');
-
-                    NETDATA.globalSelectionSync.stop();
-                    NETDATA.globalSelectionSync.delay();
-
-                    state.tmp.dygraph_user_action = true;
-                    Dygraph.endPan(event, dygraph, context);
-
-                    // refresh all the charts immediately
-                    NETDATA.options.auto_refresher_stop_until = 0;
-                } else if (context.isZooming) {
-                    //console.log('done zomming');
-
-                    NETDATA.globalSelectionSync.stop();
-                    NETDATA.globalSelectionSync.delay();
-
-                    state.tmp.dygraph_user_action = true;
-                    Dygraph.endZoom(event, dygraph, context);
-
-                    // refresh all the charts immediately
-                    NETDATA.options.auto_refresher_stop_until = 0;
-                }
-            },
-            click: function (event, dygraph, context) {
-                void(dygraph);
-                void(context);
-
-                if (NETDATA.options.debug.dygraph || state.debug) {
-                    state.log('interactionModel.click()');
-                }
-
-                event.preventDefault();
-            },
-            dblclick: function (event, dygraph, context) {
-                void(event);
-                void(dygraph);
-                void(context);
-
-                if (NETDATA.options.debug.dygraph || state.debug) {
-                    state.log('interactionModel.dblclick()');
-                }
-                NETDATA.resetAllCharts(state);
-            },
-            wheel: function (event, dygraph, context) {
-                void(context);
-
-                if (NETDATA.options.debug.dygraph || state.debug) {
-                    state.log('interactionModel.wheel()');
-                }
-
-                // Take the offset of a mouse event on the dygraph canvas and
-                // convert it to a pair of percentages from the bottom left.
-                // (Not top left, bottom is where the lower value is.)
-                function offsetToPercentage(g, offsetX, offsetY) {
-                    // This is calculating the pixel offset of the leftmost date.
-                    let xOffset = g.toDomCoords(g.xAxisRange()[0], null)[0];
-                    let yar0 = g.yAxisRange(0);
-
-                    // This is calculating the pixel of the highest value. (Top pixel)
-                    let yOffset = g.toDomCoords(null, yar0[1])[1];
-
-                    // x y w and h are relative to the corner of the drawing area,
-                    // so that the upper corner of the drawing area is (0, 0).
-                    let x = offsetX - xOffset;
-                    let y = offsetY - yOffset;
-
-                    // This is computing the rightmost pixel, effectively defining the
-                    // width.
-                    let w = g.toDomCoords(g.xAxisRange()[1], null)[0] - xOffset;
-
-                    // This is computing the lowest pixel, effectively defining the height.
-                    let h = g.toDomCoords(null, yar0[0])[1] - yOffset;
-
-                    // Percentage from the left.
-                    let xPct = w === 0 ? 0 : (x / w);
-                    // Percentage from the top.
-                    let yPct = h === 0 ? 0 : (y / h);
-
-                    // The (1-) part below changes it from "% distance down from the top"
-                    // to "% distance up from the bottom".
-                    return [xPct, (1 - yPct)];
-                }
-
-                // Adjusts [x, y] toward each other by zoomInPercentage%
-                // Split it so the left/bottom axis gets xBias/yBias of that change and
-                // tight/top gets (1-xBias)/(1-yBias) of that change.
-                //
-                // If a bias is missing it splits it down the middle.
-                function zoomRange(g, zoomInPercentage, xBias, yBias) {
-                    xBias = xBias || 0.5;
-                    yBias = yBias || 0.5;
-
-                    function adjustAxis(axis, zoomInPercentage, bias) {
-                        let delta = axis[1] - axis[0];
-                        let increment = delta * zoomInPercentage;
-                        let foo = [increment * bias, increment * (1 - bias)];
-
-                        return [axis[0] + foo[0], axis[1] - foo[1]];
-                    }
-
-                    let yAxes = g.yAxisRanges();
-                    let newYAxes = [];
-                    for (let i = 0; i < yAxes.length; i++) {
-                        newYAxes[i] = adjustAxis(yAxes[i], zoomInPercentage, yBias);
-                    }
-
-                    return adjustAxis(g.xAxisRange(), zoomInPercentage, xBias);
-                }
-
-                if (event.altKey || event.shiftKey) {
-                    state.tmp.dygraph_user_action = true;
-
-                    NETDATA.globalSelectionSync.stop();
-                    NETDATA.globalSelectionSync.delay();
-
-                    // http://dygraphs.com/gallery/interaction-api.js
-                    let normal_def;
-                    if (typeof event.wheelDelta === 'number' && !isNaN(event.wheelDelta))
-                    // chrome
-                    {
-                        normal_def = event.wheelDelta / 40;
-                    } else
-                    // firefox
-                    {
-                        normal_def = event.deltaY * -1.2;
-                    }
-
-                    let normal = (event.detail) ? event.detail * -1 : normal_def;
-                    let percentage = normal / 50;
-
-                    if (!(event.offsetX && event.offsetY)) {
-                        event.offsetX = event.layerX - event.target.offsetLeft;
-                        event.offsetY = event.layerY - event.target.offsetTop;
-                    }
-
-                    let percentages = offsetToPercentage(dygraph, event.offsetX, event.offsetY);
-                    let xPct = percentages[0];
-                    let yPct = percentages[1];
-
-                    let new_x_range = zoomRange(dygraph, percentage, xPct, yPct);
-                    let after = new_x_range[0];
-                    let before = new_x_range[1];
-
-                    let first = state.netdata_first + state.data_update_every;
-                    let last = state.netdata_last + state.data_update_every;
-
-                    if (before > last) {
-                        after -= (before - last);
-                        before = last;
-                    }
-                    if (after < first) {
-                        after = first;
-                    }
-
-                    state.setMode('zoom');
-                    state.updateChartPanOrZoom(after, before, function () {
-                        dygraph.updateOptions({dateWindow: [after, before]});
-                    });
-
-                    event.preventDefault();
-                }
-            },
-            touchstart: function (event, dygraph, context) {
-                state.tmp.dygraph_mouse_down = true;
-
-                if (NETDATA.options.debug.dygraph || state.debug) {
-                    state.log('interactionModel.touchstart()');
-                }
-
-                state.tmp.dygraph_user_action = true;
-                state.setMode('zoom');
-                state.pauseChart();
-
-                NETDATA.globalSelectionSync.stop();
-                NETDATA.globalSelectionSync.delay();
-
-                Dygraph.defaultInteractionModel.touchstart(event, dygraph, context);
-
-                // we overwrite the touch directions at the end, to overwrite
-                // the internal default of dygraph
-                context.touchDirections = {x: true, y: false};
-
-                state.dygraph_last_touch_start = Date.now();
-                state.dygraph_last_touch_move = 0;
-
-                if (typeof event.touches[0].pageX === 'number') {
-                    state.dygraph_last_touch_page_x = event.touches[0].pageX;
-                } else {
-                    state.dygraph_last_touch_page_x = 0;
-                }
-            },
-            touchmove: function (event, dygraph, context) {
-                if (NETDATA.options.debug.dygraph || state.debug) {
-                    state.log('interactionModel.touchmove()');
-                }
-
-                NETDATA.globalSelectionSync.stop();
-                NETDATA.globalSelectionSync.delay();
-
-                state.tmp.dygraph_user_action = true;
-                Dygraph.defaultInteractionModel.touchmove(event, dygraph, context);
-
-                state.dygraph_last_touch_move = Date.now();
-            },
-            touchend: function (event, dygraph, context) {
-                state.tmp.dygraph_mouse_down = false;
-
-                if (NETDATA.options.debug.dygraph || state.debug) {
-                    state.log('interactionModel.touchend()');
-                }
-
-                NETDATA.globalSelectionSync.stop();
-                NETDATA.globalSelectionSync.delay();
-
-                state.tmp.dygraph_user_action = true;
-                Dygraph.defaultInteractionModel.touchend(event, dygraph, context);
-
-                // if it didn't move, it is a selection
-                if (state.dygraph_last_touch_move === 0 && state.dygraph_last_touch_page_x !== 0) {
-                    NETDATA.globalSelectionSync.dontSyncBefore = 0;
-                    NETDATA.globalSelectionSync.setMaster(state);
-
-                    // internal api of dygraph
-                    let pct = (state.dygraph_last_touch_page_x - (dygraph.plotter_.area.x + state.element.getBoundingClientRect().left)) / dygraph.plotter_.area.w;
-                    console.log('pct: ' + pct.toString());
-
-                    let t = Math.round(state.view_after + (state.view_before - state.view_after) * pct);
-                    if (NETDATA.dygraphSetSelection(state, t)) {
-                        NETDATA.globalSelectionSync.sync(state, t);
-                    }
-                }
-
-                // if it was double tap within double click time, reset the charts
-                let now = Date.now();
-                if (typeof state.dygraph_last_touch_end !== 'undefined') {
-                    if (state.dygraph_last_touch_move === 0) {
-                        let dt = now - state.dygraph_last_touch_end;
-                        if (dt <= NETDATA.options.current.double_click_speed) {
-                            NETDATA.resetAllCharts(state);
-                        }
-                    }
-                }
-
-                // remember the timestamp of the last touch end
-                state.dygraph_last_touch_end = now;
-
-                // refresh all the charts immediately
-                NETDATA.options.auto_refresher_stop_until = 0;
-            }
-        }
-    };
-
-    if (NETDATA.chartLibraries.dygraph.isLogScale(state)) {
-        if (Array.isArray(state.tmp.dygraph_options.valueRange) && state.tmp.dygraph_options.valueRange[0] <= 0) {
-            state.tmp.dygraph_options.valueRange[0] = null;
-        }
-    }
-
-    if (NETDATA.chartLibraries.dygraph.isSparkline(state)) {
-        state.tmp.dygraph_options.drawGrid = false;
-        state.tmp.dygraph_options.drawAxis = false;
-        state.tmp.dygraph_options.title = undefined;
-        state.tmp.dygraph_options.ylabel = undefined;
-        state.tmp.dygraph_options.yLabelWidth = 0;
-        //state.tmp.dygraph_options.labelsDivWidth = 120;
-        //state.tmp.dygraph_options.labelsDivStyles.width = '120px';
-        state.tmp.dygraph_options.labelsSeparateLines = true;
-        state.tmp.dygraph_options.rightGap = 0;
-        state.tmp.dygraph_options.yRangePad = 1;
-        state.tmp.dygraph_options.axes.x.drawAxis = false;
-        state.tmp.dygraph_options.axes.y.drawAxis = false;
-    }
-
-    if (smooth) {
-        state.tmp.dygraph_smooth_eligible = true;
-
-        if (NETDATA.options.current.smooth_plot) {
-            state.tmp.dygraph_options.plotter = smoothPlotter;
-        }
-    }
-    else {
-        state.tmp.dygraph_smooth_eligible = false;
-    }
-
-    if (netdataSnapshotData !== null && NETDATA.globalPanAndZoom.isActive() && NETDATA.globalPanAndZoom.isMaster(state) === false) {
-        // pan and zoom on snapshots
-        state.tmp.dygraph_options.dateWindow = [NETDATA.globalPanAndZoom.force_after_ms, NETDATA.globalPanAndZoom.force_before_ms];
-        //state.tmp.dygraph_options.isZoomedIgnoreProgrammaticZoom = true;
-    }
-
-    let seriesStyles = NETDATA.dygraphGetSeriesStyle(state.tmp.dygraph_options);
-    state.tmp.dygraph_options.series = seriesStyles;
-
-    state.tmp.dygraph_instance = new Dygraph(
-        state.element_chart,
-        data.result.data,
-        state.tmp.dygraph_options
-    );
-
-    state.tmp.dygraph_history_tip_element = document.createElement('div');
-    state.tmp.dygraph_history_tip_element.innerHTML = `
-        <span class="dygraph__history-tip-content">
-          Want to extend your history of real-time metrics?
-          <br />
-           <a href="https://docs.netdata.cloud/docs/configuration-guide/#increase-the-metrics-retention-period" target=_blank>
-             Configure Netdata's <b>history</b></a>
-           or use the <a href="https://docs.netdata.cloud/database/engine/" target=_blank>DB engine</a>.
-        </span>
-    `;
-    state.tmp.dygraph_history_tip_element.className = 'dygraph__history-tip';
-    state.element_chart.appendChild(state.tmp.dygraph_history_tip_element);
-
-
-    state.tmp.dygraph_force_zoom = false;
-    state.tmp.dygraph_user_action = false;
-    state.tmp.dygraph_last_rendered = Date.now();
-    state.tmp.dygraph_highlight_after = null;
-
-    if (state.tmp.dygraph_options.valueRange[0] === null && state.tmp.dygraph_options.valueRange[1] === null) {
-        if (typeof state.tmp.dygraph_instance.axes_[0].extremeRange !== 'undefined') {
-            state.tmp.__commonMin = NETDATA.dataAttribute(state.element, 'common-min', null);
-            state.tmp.__commonMax = NETDATA.dataAttribute(state.element, 'common-max', null);
-        } else {
-            state.log('incompatible version of Dygraph detected');
-            state.tmp.__commonMin = null;
-            state.tmp.__commonMax = null;
-        }
-    } else {
-        // if the user gave a valueRange, respect it
-        state.tmp.__commonMin = null;
-        state.tmp.__commonMax = null;
-    }
-
-    return true;
-};
-
-NETDATA.dygraphGetSeriesStyle = function(dygraphOptions) {
-    const seriesStyleStr = dygraphOptions.perSeriesStyle;
-    let formattedStyles = {};
-
-    if (seriesStyleStr === '') {
-      return formattedStyles;
-    }
-
-    // Parse the config string into a JSON object
-    let styles = seriesStyleStr.replace(' ', '').split('|');
-
-    styles.forEach(style => {
-        const keys = style.split(':');
-        formattedStyles[keys[0]] = keys[1];
-    });
-
-    for (let key in formattedStyles) {
-        if (formattedStyles.hasOwnProperty(key)) {
-            let settings;
-
-            switch (formattedStyles[key]) {
-                case 'line':
-                    settings = { fillGraph: false };
-                    break;
-                case 'area':
-                    settings = { fillGraph: true };
-                    break;
-                case 'dot':
-                    settings = {
-                        fillGraph: false,
-                        drawPoints: true,
-                        pointSize: dygraphOptions.pointSize
-                    };
-                    break;
-                default:
-                    settings = undefined;
-            }
-
-            formattedStyles[key] = settings;
-        }
-    }
-
-    return formattedStyles;
-};
-// ----------------------------------------------------------------------------------------------------------------
-// sparkline
-
-NETDATA.sparklineInitialize = function (callback) {
-    if (typeof netdataNoSparklines === 'undefined' || !netdataNoSparklines) {
-        $.ajax({
-            url: NETDATA.sparkline_js,
-            cache: true,
-            dataType: "script",
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function () {
-                NETDATA.registerChartLibrary('sparkline', NETDATA.sparkline_js);
-            })
-            .fail(function () {
-                NETDATA.chartLibraries.sparkline.enabled = false;
-                NETDATA.error(100, NETDATA.sparkline_js);
-            })
-            .always(function () {
-                if (typeof callback === "function") {
-                    return callback();
-                }
-            });
-    } else {
-        NETDATA.chartLibraries.sparkline.enabled = false;
-        if (typeof callback === "function") {
-            return callback();
-        }
-    }
-};
-
-NETDATA.sparklineChartUpdate = function (state, data) {
-    state.sparkline_options.width = state.chartWidth();
-    state.sparkline_options.height = state.chartHeight();
-
-    $(state.element_chart).sparkline(data.result, state.sparkline_options);
-    return true;
-};
-
-NETDATA.sparklineChartCreate = function (state, data) {
-    let type = NETDATA.dataAttribute(state.element, 'sparkline-type', 'line');
-    let lineColor = NETDATA.dataAttribute(state.element, 'sparkline-linecolor', state.chartCustomColors()[0]);
-    let fillColor = NETDATA.dataAttribute(state.element, 'sparkline-fillcolor', ((state.chart.chart_type === 'line') ? NETDATA.themes.current.background : NETDATA.colorLuminance(lineColor, NETDATA.chartDefaults.fill_luminance)));
-    let chartRangeMin = NETDATA.dataAttribute(state.element, 'sparkline-chartrangemin', undefined);
-    let chartRangeMax = NETDATA.dataAttribute(state.element, 'sparkline-chartrangemax', undefined);
-    let composite = NETDATA.dataAttribute(state.element, 'sparkline-composite', undefined);
-    let enableTagOptions = NETDATA.dataAttribute(state.element, 'sparkline-enabletagoptions', undefined);
-    let tagOptionPrefix = NETDATA.dataAttribute(state.element, 'sparkline-tagoptionprefix', undefined);
-    let tagValuesAttribute = NETDATA.dataAttribute(state.element, 'sparkline-tagvaluesattribute', undefined);
-    let disableHiddenCheck = NETDATA.dataAttribute(state.element, 'sparkline-disablehiddencheck', undefined);
-    let defaultPixelsPerValue = NETDATA.dataAttribute(state.element, 'sparkline-defaultpixelspervalue', undefined);
-    let spotColor = NETDATA.dataAttribute(state.element, 'sparkline-spotcolor', undefined);
-    let minSpotColor = NETDATA.dataAttribute(state.element, 'sparkline-minspotcolor', undefined);
-    let maxSpotColor = NETDATA.dataAttribute(state.element, 'sparkline-maxspotcolor', undefined);
-    let spotRadius = NETDATA.dataAttribute(state.element, 'sparkline-spotradius', undefined);
-    let valueSpots = NETDATA.dataAttribute(state.element, 'sparkline-valuespots', undefined);
-    let highlightSpotColor = NETDATA.dataAttribute(state.element, 'sparkline-highlightspotcolor', undefined);
-    let highlightLineColor = NETDATA.dataAttribute(state.element, 'sparkline-highlightlinecolor', undefined);
-    let lineWidth = NETDATA.dataAttribute(state.element, 'sparkline-linewidth', undefined);
-    let normalRangeMin = NETDATA.dataAttribute(state.element, 'sparkline-normalrangemin', undefined);
-    let normalRangeMax = NETDATA.dataAttribute(state.element, 'sparkline-normalrangemax', undefined);
-    let drawNormalOnTop = NETDATA.dataAttribute(state.element, 'sparkline-drawnormalontop', undefined);
-    let xvalues = NETDATA.dataAttribute(state.element, 'sparkline-xvalues', undefined);
-    let chartRangeClip = NETDATA.dataAttribute(state.element, 'sparkline-chartrangeclip', undefined);
-    let chartRangeMinX = NETDATA.dataAttribute(state.element, 'sparkline-chartrangeminx', undefined);
-    let chartRangeMaxX = NETDATA.dataAttribute(state.element, 'sparkline-chartrangemaxx', undefined);
-    let disableInteraction = NETDATA.dataAttributeBoolean(state.element, 'sparkline-disableinteraction', false);
-    let disableTooltips = NETDATA.dataAttributeBoolean(state.element, 'sparkline-disabletooltips', false);
-    let disableHighlight = NETDATA.dataAttributeBoolean(state.element, 'sparkline-disablehighlight', false);
-    let highlightLighten = NETDATA.dataAttribute(state.element, 'sparkline-highlightlighten', 1.4);
-    let highlightColor = NETDATA.dataAttribute(state.element, 'sparkline-highlightcolor', undefined);
-    let tooltipContainer = NETDATA.dataAttribute(state.element, 'sparkline-tooltipcontainer', undefined);
-    let tooltipClassname = NETDATA.dataAttribute(state.element, 'sparkline-tooltipclassname', undefined);
-    let tooltipFormat = NETDATA.dataAttribute(state.element, 'sparkline-tooltipformat', undefined);
-    let tooltipPrefix = NETDATA.dataAttribute(state.element, 'sparkline-tooltipprefix', undefined);
-    let tooltipSuffix = NETDATA.dataAttribute(state.element, 'sparkline-tooltipsuffix', ' ' + state.units_current);
-    let tooltipSkipNull = NETDATA.dataAttributeBoolean(state.element, 'sparkline-tooltipskipnull', true);
-    let tooltipValueLookups = NETDATA.dataAttribute(state.element, 'sparkline-tooltipvaluelookups', undefined);
-    let tooltipFormatFieldlist = NETDATA.dataAttribute(state.element, 'sparkline-tooltipformatfieldlist', undefined);
-    let tooltipFormatFieldlistKey = NETDATA.dataAttribute(state.element, 'sparkline-tooltipformatfieldlistkey', undefined);
-    let numberFormatter = NETDATA.dataAttribute(state.element, 'sparkline-numberformatter', function (n) {
-        return n.toFixed(2);
-    });
-    let numberDigitGroupSep = NETDATA.dataAttribute(state.element, 'sparkline-numberdigitgroupsep', undefined);
-    let numberDecimalMark = NETDATA.dataAttribute(state.element, 'sparkline-numberdecimalmark', undefined);
-    let numberDigitGroupCount = NETDATA.dataAttribute(state.element, 'sparkline-numberdigitgroupcount', undefined);
-    let animatedZooms = NETDATA.dataAttributeBoolean(state.element, 'sparkline-animatedzooms', false);
-
-    if (spotColor === 'disable') {
-        spotColor = '';
-    }
-    if (minSpotColor === 'disable') {
-        minSpotColor = '';
-    }
-    if (maxSpotColor === 'disable') {
-        maxSpotColor = '';
-    }
-
-    // state.log('sparkline type ' + type + ', lineColor: ' + lineColor + ', fillColor: ' + fillColor);
-
-    state.sparkline_options = {
-        type: type,
-        lineColor: lineColor,
-        fillColor: fillColor,
-        chartRangeMin: chartRangeMin,
-        chartRangeMax: chartRangeMax,
-        composite: composite,
-        enableTagOptions: enableTagOptions,
-        tagOptionPrefix: tagOptionPrefix,
-        tagValuesAttribute: tagValuesAttribute,
-        disableHiddenCheck: disableHiddenCheck,
-        defaultPixelsPerValue: defaultPixelsPerValue,
-        spotColor: spotColor,
-        minSpotColor: minSpotColor,
-        maxSpotColor: maxSpotColor,
-        spotRadius: spotRadius,
-        valueSpots: valueSpots,
-        highlightSpotColor: highlightSpotColor,
-        highlightLineColor: highlightLineColor,
-        lineWidth: lineWidth,
-        normalRangeMin: normalRangeMin,
-        normalRangeMax: normalRangeMax,
-        drawNormalOnTop: drawNormalOnTop,
-        xvalues: xvalues,
-        chartRangeClip: chartRangeClip,
-        chartRangeMinX: chartRangeMinX,
-        chartRangeMaxX: chartRangeMaxX,
-        disableInteraction: disableInteraction,
-        disableTooltips: disableTooltips,
-        disableHighlight: disableHighlight,
-        highlightLighten: highlightLighten,
-        highlightColor: highlightColor,
-        tooltipContainer: tooltipContainer,
-        tooltipClassname: tooltipClassname,
-        tooltipChartTitle: state.title,
-        tooltipFormat: tooltipFormat,
-        tooltipPrefix: tooltipPrefix,
-        tooltipSuffix: tooltipSuffix,
-        tooltipSkipNull: tooltipSkipNull,
-        tooltipValueLookups: tooltipValueLookups,
-        tooltipFormatFieldlist: tooltipFormatFieldlist,
-        tooltipFormatFieldlistKey: tooltipFormatFieldlistKey,
-        numberFormatter: numberFormatter,
-        numberDigitGroupSep: numberDigitGroupSep,
-        numberDecimalMark: numberDecimalMark,
-        numberDigitGroupCount: numberDigitGroupCount,
-        animatedZooms: animatedZooms,
-        width: state.chartWidth(),
-        height: state.chartHeight()
-    };
-
-    $(state.element_chart).sparkline(data.result, state.sparkline_options);
-
-    return true;
-};
-// google charts
-
-// Codacy declarations
-/* global google */
-
-NETDATA.googleInitialize = function (callback) {
-    if (typeof netdataNoGoogleCharts === 'undefined' || !netdataNoGoogleCharts) {
-        $.ajax({
-            url: NETDATA.google_js,
-            cache: true,
-            dataType: "script",
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function () {
-                NETDATA.registerChartLibrary('google', NETDATA.google_js);
-                google.load('visualization', '1.1', {
-                    'packages': ['corechart', 'controls'],
-                    'callback': callback
-                });
-            })
-            .fail(function () {
-                NETDATA.chartLibraries.google.enabled = false;
-                NETDATA.error(100, NETDATA.google_js);
-                if (typeof callback === "function") {
-                    return callback();
-                }
-            });
-    } else {
-        NETDATA.chartLibraries.google.enabled = false;
-        if (typeof callback === "function") {
-            return callback();
-        }
-    }
-};
-
-NETDATA.googleChartUpdate = function (state, data) {
-    let datatable = new google.visualization.DataTable(data.result);
-    state.google_instance.draw(datatable, state.google_options);
-    return true;
-};
-
-NETDATA.googleChartCreate = function (state, data) {
-    let datatable = new google.visualization.DataTable(data.result);
-
-    state.google_options = {
-        colors: state.chartColors(),
-
-        // do not set width, height - the chart resizes itself
-        //width: state.chartWidth(),
-        //height: state.chartHeight(),
-        lineWidth: 1,
-        title: state.title,
-        fontSize: 11,
-        hAxis: {
-            //  title: "Time of Day",
-            //  format:'HH:mm:ss',
-            viewWindowMode: 'maximized',
-            slantedText: false,
-            format: 'HH:mm:ss',
-            textStyle: {
-                fontSize: 9
-            },
-            gridlines: {
-                color: '#EEE'
-            }
-        },
-        vAxis: {
-            title: state.units_current,
-            viewWindowMode: 'pretty',
-            minValue: -0.1,
-            maxValue: 0.1,
-            direction: 1,
-            textStyle: {
-                fontSize: 9
-            },
-            gridlines: {
-                color: '#EEE'
-            }
-        },
-        chartArea: {
-            width: '65%',
-            height: '80%'
-        },
-        focusTarget: 'category',
-        annotation: {
-            '1': {
-                style: 'line'
-            }
-        },
-        pointsVisible: 0,
-        titlePosition: 'out',
-        titleTextStyle: {
-            fontSize: 11
-        },
-        tooltip: {
-            isHtml: false,
-            ignoreBounds: true,
-            textStyle: {
-                fontSize: 9
-            }
-        },
-        curveType: 'function',
-        areaOpacity: 0.3,
-        isStacked: false
-    };
-
-    switch (state.chart.chart_type) {
-        case "area":
-            state.google_options.vAxis.viewWindowMode = 'maximized';
-            state.google_options.areaOpacity = NETDATA.options.current.color_fill_opacity_area;
-            state.google_instance = new google.visualization.AreaChart(state.element_chart);
-            break;
-
-        case "stacked":
-            state.google_options.isStacked = true;
-            state.google_options.areaOpacity = NETDATA.options.current.color_fill_opacity_stacked;
-            state.google_options.vAxis.viewWindowMode = 'maximized';
-            state.google_options.vAxis.minValue = null;
-            state.google_options.vAxis.maxValue = null;
-            state.google_instance = new google.visualization.AreaChart(state.element_chart);
-            break;
-
-        default:
-        case "line":
-            state.google_options.lineWidth = 2;
-            state.google_instance = new google.visualization.LineChart(state.element_chart);
-            break;
-    }
-
-    state.google_instance.draw(datatable, state.google_options);
-    return true;
-};
-// gauge.js
-
-NETDATA.gaugeInitialize = function (callback) {
-    if (typeof netdataNoGauge === 'undefined' || !netdataNoGauge) {
-        $.ajax({
-            url: NETDATA.gauge_js,
-            cache: true,
-            dataType: "script",
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function () {
-                NETDATA.registerChartLibrary('gauge', NETDATA.gauge_js);
-            })
-            .fail(function () {
-                NETDATA.chartLibraries.gauge.enabled = false;
-                NETDATA.error(100, NETDATA.gauge_js);
-            })
-            .always(function () {
-                if (typeof callback === "function") {
-                    return callback();
-                }
-            })
-    }
-    else {
-        NETDATA.chartLibraries.gauge.enabled = false;
-        if (typeof callback === "function") {
-            return callback();
-        }
-    }
-};
-
-NETDATA.gaugeAnimation = function (state, status) {
-    let speed = 32;
-
-    if (typeof status === 'boolean' && status === false) {
-        speed = 1000000000;
-    } else if (typeof status === 'number') {
-        speed = status;
-    }
-
-    // console.log('gauge speed ' + speed);
-    state.tmp.gauge_instance.animationSpeed = speed;
-    state.tmp.___gaugeOld__.speed = speed;
-};
-
-NETDATA.gaugeSet = function (state, value, min, max) {
-    if (typeof value !== 'number') {
-        value = 0;
-    }
-    if (typeof min !== 'number') {
-        min = 0;
-    }
-    if (typeof max !== 'number') {
-        max = 0;
-    }
-    if (value > max) {
-        max = value;
-    }
-    if (value < min) {
-        min = value;
-    }
-    if (min > max) {
-        let t = min;
-        min = max;
-        max = t;
-    }
-    else if (min === max) {
-        max = min + 1;
-    }
-
-    state.legendFormatValueDecimalsFromMinMax(min, max);
-
-    // gauge.js has an issue if the needle
-    // is smaller than min or larger than max
-    // when we set the new values
-    // the needle will go crazy
-
-    // to prevent it, we always feed it
-    // with a percentage, so that the needle
-    // is always between min and max
-    let pcent = (value - min) * 100 / (max - min);
-
-    // bug fix for gauge.js 1.3.1
-    // if the value is the absolute min or max, the chart is broken
-    if (pcent < 0.001) {
-        pcent = 0.001;
-    }
-    if (pcent > 99.999) {
-        pcent = 99.999;
-    }
-
-    state.tmp.gauge_instance.set(pcent);
-    // console.log('gauge set ' + pcent + ', value ' + value + ', min ' + min + ', max ' + max);
-
-    state.tmp.___gaugeOld__.value = value;
-    state.tmp.___gaugeOld__.min = min;
-    state.tmp.___gaugeOld__.max = max;
-};
-
-NETDATA.gaugeSetLabels = function (state, value, min, max) {
-    if (state.tmp.___gaugeOld__.valueLabel !== value) {
-        state.tmp.___gaugeOld__.valueLabel = value;
-        state.tmp.gaugeChartLabel.innerText = state.legendFormatValue(value);
-    }
-    if (state.tmp.___gaugeOld__.minLabel !== min) {
-        state.tmp.___gaugeOld__.minLabel = min;
-        state.tmp.gaugeChartMin.innerText = state.legendFormatValue(min);
-    }
-    if (state.tmp.___gaugeOld__.maxLabel !== max) {
-        state.tmp.___gaugeOld__.maxLabel = max;
-        state.tmp.gaugeChartMax.innerText = state.legendFormatValue(max);
-    }
-};
-
-NETDATA.gaugeClearSelection = function (state, force) {
-    if (typeof state.tmp.gaugeEvent !== 'undefined' && typeof state.tmp.gaugeEvent.timer !== 'undefined') {
-        NETDATA.timeout.clear(state.tmp.gaugeEvent.timer);
-        state.tmp.gaugeEvent.timer = undefined;
-    }
-
-    if (state.isAutoRefreshable() && state.data !== null && force !== true) {
-        NETDATA.gaugeChartUpdate(state, state.data);
-    } else {
-        NETDATA.gaugeAnimation(state, false);
-        NETDATA.gaugeSetLabels(state, null, null, null);
-        NETDATA.gaugeSet(state, null, null, null);
-    }
-
-    NETDATA.gaugeAnimation(state, true);
-    return true;
-};
-
-NETDATA.gaugeSetSelection = function (state, t) {
-    if (state.timeIsVisible(t) !== true) {
-        return NETDATA.gaugeClearSelection(state, true);
-    }
-
-    let slot = state.calculateRowForTime(t);
-    if (slot < 0 || slot >= state.data.result.length) {
-        return NETDATA.gaugeClearSelection(state, true);
-    }
-
-    if (typeof state.tmp.gaugeEvent === 'undefined') {
-        state.tmp.gaugeEvent = {
-            timer: undefined,
-            value: 0,
-            min: 0,
-            max: 0
-        };
-    }
-
-    let value = state.data.result[state.data.result.length - 1 - slot];
-    let min = (state.tmp.gaugeMin === null) ? NETDATA.commonMin.get(state) : state.tmp.gaugeMin;
-    let max = (state.tmp.gaugeMax === null) ? NETDATA.commonMax.get(state) : state.tmp.gaugeMax;
-
-    // make sure it is zero based
-    // but only if it has not been set by the user
-    if (state.tmp.gaugeMin === null && min > 0) {
-        min = 0;
-    }
-    if (state.tmp.gaugeMax === null && max < 0) {
-        max = 0;
-    }
-
-    state.tmp.gaugeEvent.value = value;
-    state.tmp.gaugeEvent.min = min;
-    state.tmp.gaugeEvent.max = max;
-    NETDATA.gaugeSetLabels(state, value, min, max);
-
-    if (state.tmp.gaugeEvent.timer === undefined) {
-        NETDATA.gaugeAnimation(state, false);
-
-        state.tmp.gaugeEvent.timer = NETDATA.timeout.set(function () {
-            state.tmp.gaugeEvent.timer = undefined;
-            NETDATA.gaugeSet(state, state.tmp.gaugeEvent.value, state.tmp.gaugeEvent.min, state.tmp.gaugeEvent.max);
-        }, 0);
-    }
-
-    return true;
-};
-
-NETDATA.gaugeChartUpdate = function (state, data) {
-    let value, min, max;
-
-    if (NETDATA.globalPanAndZoom.isActive() || state.isAutoRefreshable() === false) {
-        NETDATA.gaugeSetLabels(state, null, null, null);
-        state.tmp.gauge_instance.set(0);
-    } else {
-        value = data.result[0];
-        min = (state.tmp.gaugeMin === null) ? NETDATA.commonMin.get(state) : state.tmp.gaugeMin;
-        max = (state.tmp.gaugeMax === null) ? NETDATA.commonMax.get(state) : state.tmp.gaugeMax;
-        if (value < min) {
-            min = value;
-        }
-        if (value > max) {
-            max = value;
-        }
-
-        // make sure it is zero based
-        // but only if it has not been set by the user
-        if (state.tmp.gaugeMin === null && min > 0) {
-            min = 0;
-        }
-        if (state.tmp.gaugeMax === null && max < 0) {
-            max = 0;
-        }
-
-        NETDATA.gaugeSet(state, value, min, max);
-        NETDATA.gaugeSetLabels(state, value, min, max);
-    }
-
-    return true;
-};
-
-NETDATA.gaugeChartCreate = function (state, data) {
-    // let chart = $(state.element_chart);
-
-    let value = data.result[0];
-    let min = NETDATA.dataAttribute(state.element, 'gauge-min-value', null);
-    let max = NETDATA.dataAttribute(state.element, 'gauge-max-value', null);
-    // let adjust = NETDATA.dataAttribute(state.element, 'gauge-adjust', null);
-    let pointerColor = NETDATA.dataAttribute(state.element, 'gauge-pointer-color', NETDATA.themes.current.gauge_pointer);
-    let strokeColor = NETDATA.dataAttribute(state.element, 'gauge-stroke-color', NETDATA.themes.current.gauge_stroke);
-    let startColor = NETDATA.dataAttribute(state.element, 'gauge-start-color', state.chartCustomColors()[0]);
-    let stopColor = NETDATA.dataAttribute(state.element, 'gauge-stop-color', void 0);
-    let generateGradient = NETDATA.dataAttribute(state.element, 'gauge-generate-gradient', false);
-
-    if (min === null) {
-        min = NETDATA.commonMin.get(state);
-        state.tmp.gaugeMin = null;
-    } else {
-        state.tmp.gaugeMin = min;
-    }
-
-    if (max === null) {
-        max = NETDATA.commonMax.get(state);
-        state.tmp.gaugeMax = null;
-    } else {
-        state.tmp.gaugeMax = max;
-    }
-
-    // make sure it is zero based
-    // but only if it has not been set by the user
-    if (state.tmp.gaugeMin === null && min > 0) {
-        min = 0;
-    }
-    if (state.tmp.gaugeMax === null && max < 0) {
-        max = 0;
-    }
-
-    let width = state.chartWidth(), height = state.chartHeight(); //, ratio = 1.5;
-    // console.log('gauge width: ' + width.toString() + ', height: ' + height.toString());
-    //switch(adjust) {
-    //  case 'width': width = height * ratio; break;
-    //  case 'height':
-    //  default: height = width / ratio; break;
-    //}
-    //state.element.style.width = width.toString() + 'px';
-    //state.element.style.height = height.toString() + 'px';
-
-    let lum_d = 0.05;
-
-    let options = {
-        lines: 12,                  // The number of lines to draw
-        angle: 0.14,                // The span of the gauge arc
-        lineWidth: 0.57,            // The line thickness
-        radiusScale: 1.0,           // Relative radius
-        pointer: {
-            length: 0.85,           // 0.9 The radius of the inner circle
-            strokeWidth: 0.045,     // The rotation offset
-            color: pointerColor     // Fill color
-        },
-        limitMax: true,             // If false, the max value of the gauge will be updated if value surpass max
-        limitMin: true,             // If true, the min value of the gauge will be fixed unless you set it manually
-        colorStart: startColor,     // Colors
-        colorStop: stopColor,       // just experiment with them
-        strokeColor: strokeColor,   // to see which ones work best for you
-        generateGradient: (generateGradient === true), // gmosx: 
-        gradientType: 0,
-        highDpiSupport: true        // High resolution support
-    };
-
-    if (generateGradient.constructor === Array) {
-        // example options:
-        // data-gauge-generate-gradient="[0, 50, 100]"
-        // data-gauge-gradient-percent-color-0="#FFFFFF"
-        // data-gauge-gradient-percent-color-50="#999900"
-        // data-gauge-gradient-percent-color-100="#000000"
-
-        options.percentColors = [];
-        let len = generateGradient.length;
-        while (len--) {
-            let pcent = generateGradient[len];
-            let color = NETDATA.dataAttribute(state.element, 'gauge-gradient-percent-color-' + pcent.toString(), false);
-            if (color !== false) {
-                let a = [];
-                a[0] = pcent / 100;
-                a[1] = color;
-                options.percentColors.unshift(a);
-            }
-        }
-        if (options.percentColors.length === 0) {
-            delete options.percentColors;
-        }
-    } else if (generateGradient === false && NETDATA.themes.current.gauge_gradient) {
-        //noinspection PointlessArithmeticExpressionJS
-        options.percentColors = [
-            [0.0, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 0))],
-            [0.1, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 1))],
-            [0.2, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 2))],
-            [0.3, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 3))],
-            [0.4, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 4))],
-            [0.5, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 5))],
-            [0.6, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 6))],
-            [0.7, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 7))],
-            [0.8, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 8))],
-            [0.9, NETDATA.colorLuminance(startColor, (lum_d * 10) - (lum_d * 9))],
-            [1.0, NETDATA.colorLuminance(startColor, 0.0)]];
-    }
-
-    state.tmp.gauge_canvas = document.createElement('canvas');
-    state.tmp.gauge_canvas.id = 'gauge-' + state.uuid + '-canvas';
-    state.tmp.gauge_canvas.className = 'gaugeChart';
-    state.tmp.gauge_canvas.width = width;
-    state.tmp.gauge_canvas.height = height;
-    state.element_chart.appendChild(state.tmp.gauge_canvas);
-
-    let valuefontsize = Math.floor(height / 5);
-    let valuetop = Math.round((height - valuefontsize) / 3.2);
-    state.tmp.gaugeChartLabel = document.createElement('span');
-    state.tmp.gaugeChartLabel.className = 'gaugeChartLabel';
-    state.tmp.gaugeChartLabel.style.fontSize = valuefontsize + 'px';
-    state.tmp.gaugeChartLabel.style.top = valuetop.toString() + 'px';
-    state.element_chart.appendChild(state.tmp.gaugeChartLabel);
-
-    let titlefontsize = Math.round(valuefontsize / 2.1);
-    let titletop = 0;
-    state.tmp.gaugeChartTitle = document.createElement('span');
-    state.tmp.gaugeChartTitle.className = 'gaugeChartTitle';
-    state.tmp.gaugeChartTitle.innerText = state.title;
-    state.tmp.gaugeChartTitle.style.fontSize = titlefontsize + 'px';
-    state.tmp.gaugeChartTitle.style.lineHeight = titlefontsize + 'px';
-    state.tmp.gaugeChartTitle.style.top = titletop.toString() + 'px';
-    state.element_chart.appendChild(state.tmp.gaugeChartTitle);
-
-    let unitfontsize = Math.round(titlefontsize * 0.9);
-    state.tmp.gaugeChartUnits = document.createElement('span');
-    state.tmp.gaugeChartUnits.className = 'gaugeChartUnits';
-    state.tmp.gaugeChartUnits.innerText = state.units_current;
-    state.tmp.gaugeChartUnits.style.fontSize = unitfontsize + 'px';
-    state.element_chart.appendChild(state.tmp.gaugeChartUnits);
-
-    state.tmp.gaugeChartMin = document.createElement('span');
-    state.tmp.gaugeChartMin.className = 'gaugeChartMin';
-    state.tmp.gaugeChartMin.style.fontSize = Math.round(valuefontsize * 0.75).toString() + 'px';
-    state.element_chart.appendChild(state.tmp.gaugeChartMin);
-
-    state.tmp.gaugeChartMax = document.createElement('span');
-    state.tmp.gaugeChartMax.className = 'gaugeChartMax';
-    state.tmp.gaugeChartMax.style.fontSize = Math.round(valuefontsize * 0.75).toString() + 'px';
-    state.element_chart.appendChild(state.tmp.gaugeChartMax);
-
-    // when we just re-create the chart
-    // do not animate the first update
-    let animate = true;
-    if (typeof state.tmp.gauge_instance !== 'undefined') {
-        animate = false;
-    }
-
-    state.tmp.gauge_instance = new Gauge(state.tmp.gauge_canvas).setOptions(options); // create sexy gauge!
-
-    state.tmp.___gaugeOld__ = {
-        value: value,
-        min: min,
-        max: max,
-        valueLabel: null,
-        minLabel: null,
-        maxLabel: null
-    };
-
-    // we will always feed a percentage
-    state.tmp.gauge_instance.minValue = 0;
-    state.tmp.gauge_instance.maxValue = 100;
-
-    NETDATA.gaugeAnimation(state, animate);
-    NETDATA.gaugeSet(state, value, min, max);
-    NETDATA.gaugeSetLabels(state, value, min, max);
-    NETDATA.gaugeAnimation(state, true);
-
-    state.legendSetUnitsString = function (units) {
-        if (typeof state.tmp.gaugeChartUnits !== 'undefined' && state.tmp.units !== units) {
-            state.tmp.gaugeChartUnits.innerText = units;
-            state.tmp.___gaugeOld__.valueLabel = null;
-            state.tmp.___gaugeOld__.minLabel = null;
-            state.tmp.___gaugeOld__.maxLabel = null;
-            state.tmp.units = units;
-        }
-    };
-    state.legendShowUndefined = function () {
-        if (typeof state.tmp.gauge_instance !== 'undefined') {
-            NETDATA.gaugeClearSelection(state);
-        }
-    };
-
-    return true;
-};
-// ----------------------------------------------------------------------------------------------------------------
-
-NETDATA.easypiechartPercentFromValueMinMax = function (state, value, min, max) {
-    if (typeof value !== 'number') {
-        value = 0;
-    }
-    if (typeof min !== 'number') {
-        min = 0;
-    }
-    if (typeof max !== 'number') {
-        max = 0;
-    }
-
-    if (min > max) {
-        let t = min;
-        min = max;
-        max = t;
-    }
-
-    if (min > value) {
-        min = value;
-    }
-    if (max < value) {
-        max = value;
-    }
-
-    state.legendFormatValueDecimalsFromMinMax(min, max);
-
-    if (state.tmp.easyPieChartMin === null && min > 0) {
-        min = 0;
-    }
-    if (state.tmp.easyPieChartMax === null && max < 0) {
-        max = 0;
-    }
-
-    let pcent;
-
-    if (min < 0 && max > 0) {
-        // it is both positive and negative
-        // zero at the top center of the chart
-        max = (-min > max) ? -min : max;
-        pcent = Math.round(value * 100 / max);
-    } else if (value >= 0 && min >= 0 && max >= 0) {
-        // clockwise
-        pcent = Math.round((value - min) * 100 / (max - min));
-        if (pcent === 0) {
-            pcent = 0.1;
-        }
-    } else {
-        // counter clockwise
-        pcent = Math.round((value - max) * 100 / (max - min));
-        if (pcent === 0) {
-            pcent = -0.1;
-        }
-    }
-
-    return pcent;
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// easy-pie-chart
-
-NETDATA.easypiechartInitialize = function (callback) {
-    if (typeof netdataNoEasyPieChart === 'undefined' || !netdataNoEasyPieChart) {
-        $.ajax({
-            url: NETDATA.easypiechart_js,
-            cache: true,
-            dataType: "script",
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function () {
-                NETDATA.registerChartLibrary('easypiechart', NETDATA.easypiechart_js);
-            })
-            .fail(function () {
-                NETDATA.chartLibraries.easypiechart.enabled = false;
-                NETDATA.error(100, NETDATA.easypiechart_js);
-            })
-            .always(function () {
-                if (typeof callback === "function") {
-                    return callback();
-                }
-            })
-    } else {
-        NETDATA.chartLibraries.easypiechart.enabled = false;
-        if (typeof callback === "function") {
-            return callback();
-        }
-    }
-};
-
-NETDATA.easypiechartClearSelection = function (state, force) {
-    if (typeof state.tmp.easyPieChartEvent !== 'undefined' && typeof state.tmp.easyPieChartEvent.timer !== 'undefined') {
-        NETDATA.timeout.clear(state.tmp.easyPieChartEvent.timer);
-        state.tmp.easyPieChartEvent.timer = undefined;
-    }
-
-    if (state.isAutoRefreshable() && state.data !== null && force !== true) {
-        NETDATA.easypiechartChartUpdate(state, state.data);
-    }
-    else {
-        state.tmp.easyPieChartLabel.innerText = state.legendFormatValue(null);
-        state.tmp.easyPieChart_instance.update(0);
-    }
-    state.tmp.easyPieChart_instance.enableAnimation();
-
-    return true;
-};
-
-NETDATA.easypiechartSetSelection = function (state, t) {
-    if (state.timeIsVisible(t) !== true) {
-        return NETDATA.easypiechartClearSelection(state, true);
-    }
-
-    let slot = state.calculateRowForTime(t);
-    if (slot < 0 || slot >= state.data.result.length) {
-        return NETDATA.easypiechartClearSelection(state, true);
-    }
-
-    if (typeof state.tmp.easyPieChartEvent === 'undefined') {
-        state.tmp.easyPieChartEvent = {
-            timer: undefined,
-            value: 0,
-            pcent: 0
-        };
-    }
-
-    let value = state.data.result[state.data.result.length - 1 - slot];
-    let min = (state.tmp.easyPieChartMin === null) ? NETDATA.commonMin.get(state) : state.tmp.easyPieChartMin;
-    let max = (state.tmp.easyPieChartMax === null) ? NETDATA.commonMax.get(state) : state.tmp.easyPieChartMax;
-    let pcent = NETDATA.easypiechartPercentFromValueMinMax(state, value, min, max);
-
-    state.tmp.easyPieChartEvent.value = value;
-    state.tmp.easyPieChartEvent.pcent = pcent;
-    state.tmp.easyPieChartLabel.innerText = state.legendFormatValue(value);
-
-    if (state.tmp.easyPieChartEvent.timer === undefined) {
-        state.tmp.easyPieChart_instance.disableAnimation();
-
-        state.tmp.easyPieChartEvent.timer = NETDATA.timeout.set(function () {
-            state.tmp.easyPieChartEvent.timer = undefined;
-            state.tmp.easyPieChart_instance.update(state.tmp.easyPieChartEvent.pcent);
-        }, 0);
-    }
-
-    return true;
-};
-
-NETDATA.easypiechartChartUpdate = function (state, data) {
-    let value, min, max, pcent;
-
-    if (NETDATA.globalPanAndZoom.isActive() || state.isAutoRefreshable() === false) {
-        value = null;
-        pcent = 0;
-    }
-    else {
-        value = data.result[0];
-        min = (state.tmp.easyPieChartMin === null) ? NETDATA.commonMin.get(state) : state.tmp.easyPieChartMin;
-        max = (state.tmp.easyPieChartMax === null) ? NETDATA.commonMax.get(state) : state.tmp.easyPieChartMax;
-        pcent = NETDATA.easypiechartPercentFromValueMinMax(state, value, min, max);
-    }
-
-    state.tmp.easyPieChartLabel.innerText = state.legendFormatValue(value);
-    state.tmp.easyPieChart_instance.update(pcent);
-    return true;
-};
-
-NETDATA.easypiechartChartCreate = function (state, data) {
-    let chart = $(state.element_chart);
-
-    let value = data.result[0];
-    let min = NETDATA.dataAttribute(state.element, 'easypiechart-min-value', null);
-    let max = NETDATA.dataAttribute(state.element, 'easypiechart-max-value', null);
-
-    if (min === null) {
-        min = NETDATA.commonMin.get(state);
-        state.tmp.easyPieChartMin = null;
-    }
-    else {
-        state.tmp.easyPieChartMin = min;
-    }
-
-    if (max === null) {
-        max = NETDATA.commonMax.get(state);
-        state.tmp.easyPieChartMax = null;
-    }
-    else {
-        state.tmp.easyPieChartMax = max;
-    }
-
-    let size = state.chartWidth();
-    let stroke = Math.floor(size / 22);
-    if (stroke < 3) {
-        stroke = 2;
-    }
-
-    let valuefontsize = Math.floor((size * 2 / 3) / 5);
-    let valuetop = Math.round((size - valuefontsize - (size / 40)) / 2);
-    state.tmp.easyPieChartLabel = document.createElement('span');
-    state.tmp.easyPieChartLabel.className = 'easyPieChartLabel';
-    state.tmp.easyPieChartLabel.innerText = state.legendFormatValue(value);
-    state.tmp.easyPieChartLabel.style.fontSize = valuefontsize + 'px';
-    state.tmp.easyPieChartLabel.style.top = valuetop.toString() + 'px';
-    state.element_chart.appendChild(state.tmp.easyPieChartLabel);
-
-    let titlefontsize = Math.round(valuefontsize * 1.6 / 3);
-    let titletop = Math.round(valuetop - (titlefontsize * 2) - (size / 40));
-    state.tmp.easyPieChartTitle = document.createElement('span');
-    state.tmp.easyPieChartTitle.className = 'easyPieChartTitle';
-    state.tmp.easyPieChartTitle.innerText = state.title;
-    state.tmp.easyPieChartTitle.style.fontSize = titlefontsize + 'px';
-    state.tmp.easyPieChartTitle.style.lineHeight = titlefontsize + 'px';
-    state.tmp.easyPieChartTitle.style.top = titletop.toString() + 'px';
-    state.element_chart.appendChild(state.tmp.easyPieChartTitle);
-
-    let unitfontsize = Math.round(titlefontsize * 0.9);
-    let unittop = Math.round(valuetop + (valuefontsize + unitfontsize) + (size / 40));
-    state.tmp.easyPieChartUnits = document.createElement('span');
-    state.tmp.easyPieChartUnits.className = 'easyPieChartUnits';
-    state.tmp.easyPieChartUnits.innerText = state.units_current;
-    state.tmp.easyPieChartUnits.style.fontSize = unitfontsize + 'px';
-    state.tmp.easyPieChartUnits.style.top = unittop.toString() + 'px';
-    state.element_chart.appendChild(state.tmp.easyPieChartUnits);
-
-    let barColor = NETDATA.dataAttribute(state.element, 'easypiechart-barcolor', undefined);
-    if (typeof barColor === 'undefined' || barColor === null) {
-        barColor = state.chartCustomColors()[0];
-    } else {
-        // <div ... data-easypiechart-barcolor="(function(percent){return(percent < 50 ? '#5cb85c' : percent < 85 ? '#f0ad4e' : '#cb3935');})" ...></div>
-        let tmp = eval(barColor);
-        if (typeof tmp === 'function') {
-            barColor = tmp;
-        }
-    }
-
-    let pcent = NETDATA.easypiechartPercentFromValueMinMax(state, value, min, max);
-    chart.data('data-percent', pcent);
-
-    chart.easyPieChart({
-        barColor: barColor,
-        trackColor: NETDATA.dataAttribute(state.element, 'easypiechart-trackcolor', NETDATA.themes.current.easypiechart_track),
-        scaleColor: NETDATA.dataAttribute(state.element, 'easypiechart-scalecolor', NETDATA.themes.current.easypiechart_scale),
-        scaleLength: NETDATA.dataAttribute(state.element, 'easypiechart-scalelength', 5),
-        lineCap: NETDATA.dataAttribute(state.element, 'easypiechart-linecap', 'round'),
-        lineWidth: NETDATA.dataAttribute(state.element, 'easypiechart-linewidth', stroke),
-        trackWidth: NETDATA.dataAttribute(state.element, 'easypiechart-trackwidth', undefined),
-        size: NETDATA.dataAttribute(state.element, 'easypiechart-size', size),
-        rotate: NETDATA.dataAttribute(state.element, 'easypiechart-rotate', 0),
-        animate: NETDATA.dataAttribute(state.element, 'easypiechart-animate', {duration: 500, enabled: true}),
-        easing: NETDATA.dataAttribute(state.element, 'easypiechart-easing', undefined)
-    });
-
-    // when we just re-create the chart
-    // do not animate the first update
-    let animate = true;
-    if (typeof state.tmp.easyPieChart_instance !== 'undefined') {
-        animate = false;
-    }
-
-    state.tmp.easyPieChart_instance = chart.data('easyPieChart');
-    if (animate === false) {
-        state.tmp.easyPieChart_instance.disableAnimation();
-    }
-    state.tmp.easyPieChart_instance.update(pcent);
-    if (animate === false) {
-        state.tmp.easyPieChart_instance.enableAnimation();
-    }
-
-    state.legendSetUnitsString = function (units) {
-        if (typeof state.tmp.easyPieChartUnits !== 'undefined' && state.tmp.units !== units) {
-            state.tmp.easyPieChartUnits.innerText = units;
-            state.tmp.units = units;
-        }
-    };
-    state.legendShowUndefined = function () {
-        if (typeof state.tmp.easyPieChart_instance !== 'undefined') {
-            NETDATA.easypiechartClearSelection(state);
-        }
-    };
-
-    return true;
-};
-
-// d3pie
-
-NETDATA.d3pieInitialize = function (callback) {
-    if (typeof netdataNoD3pie === 'undefined' || !netdataNoD3pie) {
-
-        // d3pie requires D3
-        if (!NETDATA.chartLibraries.d3.initialized) {
-            if (NETDATA.chartLibraries.d3.enabled) {
-                NETDATA.d3Initialize(function () {
-                    NETDATA.d3pieInitialize(callback);
-                });
-            } else {
-                NETDATA.chartLibraries.d3pie.enabled = false;
-                if (typeof callback === "function") {
-                    return callback();
-                }
-            }
-        } else {
-            $.ajax({
-                url: NETDATA.d3pie_js,
-                cache: true,
-                dataType: "script",
-                xhrFields: {withCredentials: true} // required for the cookie
-            })
-                .done(function () {
-                    NETDATA.registerChartLibrary('d3pie', NETDATA.d3pie_js);
-                })
-                .fail(function () {
-                    NETDATA.chartLibraries.d3pie.enabled = false;
-                    NETDATA.error(100, NETDATA.d3pie_js);
-                })
-                .always(function () {
-                    if (typeof callback === "function") {
-                        return callback();
-                    }
-                });
-        }
-    } else {
-        NETDATA.chartLibraries.d3pie.enabled = false;
-        if (typeof callback === "function") {
-            return callback();
-        }
-    }
-};
-
-NETDATA.d3pieSetContent = function (state, data, index) {
-    state.legendFormatValueDecimalsFromMinMax(
-        data.min,
-        data.max
-    );
-
-    let content = [];
-    let colors = state.chartColors();
-    let len = data.result.labels.length;
-    for (let i = 1; i < len; i++) {
-        let label = data.result.labels[i];
-        let value = data.result.data[index][label];
-        let color = colors[i - 1];
-
-        if (value !== null && value > 0) {
-            content.push({
-                label: label,
-                value: value,
-                color: color
-            });
-        }
-    }
-
-    if (content.length === 0) {
-        content.push({
-            label: 'no data',
-            value: 100,
-            color: '#666666'
-        });
-    }
-
-    state.tmp.d3pie_last_slot = index;
-    return content;
-};
-
-NETDATA.d3pieDateRange = function (state, data, index) {
-    let dt = Math.round((data.before - data.after + 1) / data.points);
-    let dt_str = NETDATA.seconds4human(dt);
-
-    let before = data.result.data[index].time;
-    let after = before - (dt * 1000);
-
-    let d1 = NETDATA.dateTime.localeDateString(after);
-    let t1 = NETDATA.dateTime.localeTimeString(after);
-    let d2 = NETDATA.dateTime.localeDateString(before);
-    let t2 = NETDATA.dateTime.localeTimeString(before);
-
-    if (d1 === d2) {
-        return d1 + ' ' + t1 + ' to ' + t2 + ', ' + dt_str;
-    }
-
-    return d1 + ' ' + t1 + ' to ' + d2 + ' ' + t2 + ', ' + dt_str;
-};
-
-NETDATA.d3pieSetSelection = function (state, t) {
-    if (state.timeIsVisible(t) !== true) {
-        return NETDATA.d3pieClearSelection(state, true);
-    }
-
-    let slot = state.calculateRowForTime(t);
-    slot = state.data.result.data.length - slot - 1;
-
-    if (slot < 0 || slot >= state.data.result.length) {
-        return NETDATA.d3pieClearSelection(state, true);
-    }
-
-    if (state.tmp.d3pie_last_slot === slot) {
-        // we already show this slot, don't do anything
-        return true;
-    }
-
-    if (state.tmp.d3pie_timer === undefined) {
-        state.tmp.d3pie_timer = NETDATA.timeout.set(function () {
-            state.tmp.d3pie_timer = undefined;
-            NETDATA.d3pieChange(state, NETDATA.d3pieSetContent(state, state.data, slot), NETDATA.d3pieDateRange(state, state.data, slot));
-        }, 0);
-    }
-
-    return true;
-};
-
-NETDATA.d3pieClearSelection = function (state, force) {
-    if (typeof state.tmp.d3pie_timer !== 'undefined') {
-        NETDATA.timeout.clear(state.tmp.d3pie_timer);
-        state.tmp.d3pie_timer = undefined;
-    }
-
-    if (state.isAutoRefreshable() && state.data !== null && force !== true) {
-        NETDATA.d3pieChartUpdate(state, state.data);
-    } else {
-        if (state.tmp.d3pie_last_slot !== -1) {
-            state.tmp.d3pie_last_slot = -1;
-            NETDATA.d3pieChange(state, [{label: 'no data', value: 1, color: '#666666'}], 'no data available');
-        }
-    }
-
-    return true;
-};
-
-NETDATA.d3pieChange = function (state, content, footer) {
-    if (state.d3pie_forced_subtitle === null) {
-        //state.d3pie_instance.updateProp("header.subtitle.text", state.units_current);
-        state.d3pie_instance.options.header.subtitle.text = state.units_current;
-    }
-
-    if (state.d3pie_forced_footer === null) {
-        //state.d3pie_instance.updateProp("footer.text", footer);
-        state.d3pie_instance.options.footer.text = footer;
-    }
-
-    //state.d3pie_instance.updateProp("data.content", content);
-    state.d3pie_instance.options.data.content = content;
-    state.d3pie_instance.destroy();
-    state.d3pie_instance.recreate();
-    return true;
-};
-
-NETDATA.d3pieChartUpdate = function (state, data) {
-    return NETDATA.d3pieChange(state, NETDATA.d3pieSetContent(state, data, 0), NETDATA.d3pieDateRange(state, data, 0));
-};
-
-NETDATA.d3pieChartCreate = function (state, data) {
-
-    state.element_chart.id = 'd3pie-' + state.uuid;
-    // console.log('id = ' + state.element_chart.id);
-
-    let content = NETDATA.d3pieSetContent(state, data, 0);
-
-    state.d3pie_forced_title = NETDATA.dataAttribute(state.element, 'd3pie-title', null);
-    state.d3pie_forced_subtitle = NETDATA.dataAttribute(state.element, 'd3pie-subtitle', null);
-    state.d3pie_forced_footer = NETDATA.dataAttribute(state.element, 'd3pie-footer', null);
-
-    state.d3pie_options = {
-        header: {
-            title: {
-                text: (state.d3pie_forced_title !== null) ? state.d3pie_forced_title : state.title,
-                color: NETDATA.dataAttribute(state.element, 'd3pie-title-color', NETDATA.themes.current.d3pie.title),
-                fontSize: NETDATA.dataAttribute(state.element, 'd3pie-title-fontsize', 12),
-                fontWeight: NETDATA.dataAttribute(state.element, 'd3pie-title-fontweight', "bold"),
-                font: NETDATA.dataAttribute(state.element, 'd3pie-title-font', "arial")
-            },
-            subtitle: {
-                text: (state.d3pie_forced_subtitle !== null) ? state.d3pie_forced_subtitle : state.units_current,
-                color: NETDATA.dataAttribute(state.element, 'd3pie-subtitle-color', NETDATA.themes.current.d3pie.subtitle),
-                fontSize: NETDATA.dataAttribute(state.element, 'd3pie-subtitle-fontsize', 10),
-                fontWeight: NETDATA.dataAttribute(state.element, 'd3pie-subtitle-fontweight', "normal"),
-                font: NETDATA.dataAttribute(state.element, 'd3pie-subtitle-font', "arial")
-            },
-            titleSubtitlePadding: 1
-        },
-        footer: {
-            text: (state.d3pie_forced_footer !== null) ? state.d3pie_forced_footer : NETDATA.d3pieDateRange(state, data, 0),
-            color: NETDATA.dataAttribute(state.element, 'd3pie-footer-color', NETDATA.themes.current.d3pie.footer),
-            fontSize: NETDATA.dataAttribute(state.element, 'd3pie-footer-fontsize', 9),
-            fontWeight: NETDATA.dataAttribute(state.element, 'd3pie-footer-fontweight', "bold"),
-            font: NETDATA.dataAttribute(state.element, 'd3pie-footer-font', "arial"),
-            location: NETDATA.dataAttribute(state.element, 'd3pie-footer-location', "bottom-center") // bottom-left, bottom-center, bottom-right
-        },
-        size: {
-            canvasHeight: state.chartHeight(),
-            canvasWidth: state.chartWidth(),
-            pieInnerRadius: NETDATA.dataAttribute(state.element, 'd3pie-pieinnerradius', "45%"),
-            pieOuterRadius: NETDATA.dataAttribute(state.element, 'd3pie-pieouterradius', "80%")
-        },
-        data: {
-            // none, random, value-asc, value-desc, label-asc, label-desc
-            sortOrder: NETDATA.dataAttribute(state.element, 'd3pie-sortorder', "value-desc"),
-            smallSegmentGrouping: {
-                enabled: NETDATA.dataAttributeBoolean(state.element, "d3pie-smallsegmentgrouping-enabled", false),
-                value: NETDATA.dataAttribute(state.element, 'd3pie-smallsegmentgrouping-value', 1),
-                // percentage, value
-                valueType: NETDATA.dataAttribute(state.element, 'd3pie-smallsegmentgrouping-valuetype', "percentage"),
-                label: NETDATA.dataAttribute(state.element, 'd3pie-smallsegmentgrouping-label', "other"),
-                color: NETDATA.dataAttribute(state.element, 'd3pie-smallsegmentgrouping-color', NETDATA.themes.current.d3pie.other)
-            },
-
-            // REQUIRED! This is where you enter your pie data; it needs to be an array of objects
-            // of this form: { label: "label", value: 1.5, color: "#000000" } - color is optional
-            content: content
-        },
-        labels: {
-            outer: {
-                // label, value, percentage, label-value1, label-value2, label-percentage1, label-percentage2
-                format: NETDATA.dataAttribute(state.element, 'd3pie-labels-outer-format', "label-value1"),
-                hideWhenLessThanPercentage: NETDATA.dataAttribute(state.element, 'd3pie-labels-outer-hidewhenlessthanpercentage', null),
-                pieDistance: NETDATA.dataAttribute(state.element, 'd3pie-labels-outer-piedistance', 15)
-            },
-            inner: {
-                // label, value, percentage, label-value1, label-value2, label-percentage1, label-percentage2
-                format: NETDATA.dataAttribute(state.element, 'd3pie-labels-inner-format', "percentage"),
-                hideWhenLessThanPercentage: NETDATA.dataAttribute(state.element, 'd3pie-labels-inner-hidewhenlessthanpercentage', 2)
-            },
-            mainLabel: {
-                color: NETDATA.dataAttribute(state.element, 'd3pie-labels-mainLabel-color', NETDATA.themes.current.d3pie.mainlabel), // or 'segment' for dynamic color
-                font: NETDATA.dataAttribute(state.element, 'd3pie-labels-mainLabel-font', "arial"),
-                fontSize: NETDATA.dataAttribute(state.element, 'd3pie-labels-mainLabel-fontsize', 10),
-                fontWeight: NETDATA.dataAttribute(state.element, 'd3pie-labels-mainLabel-fontweight', "normal")
-            },
-            percentage: {
-                color: NETDATA.dataAttribute(state.element, 'd3pie-labels-percentage-color', NETDATA.themes.current.d3pie.percentage),
-                font: NETDATA.dataAttribute(state.element, 'd3pie-labels-percentage-font', "arial"),
-                fontSize: NETDATA.dataAttribute(state.element, 'd3pie-labels-percentage-fontsize', 10),
-                fontWeight: NETDATA.dataAttribute(state.element, 'd3pie-labels-percentage-fontweight', "bold"),
-                decimalPlaces: 0
-            },
-            value: {
-                color: NETDATA.dataAttribute(state.element, 'd3pie-labels-value-color', NETDATA.themes.current.d3pie.value),
-                font: NETDATA.dataAttribute(state.element, 'd3pie-labels-value-font', "arial"),
-                fontSize: NETDATA.dataAttribute(state.element, 'd3pie-labels-value-fontsize', 10),
-                fontWeight: NETDATA.dataAttribute(state.element, 'd3pie-labels-value-fontweight', "bold")
-            },
-            lines: {
-                enabled: NETDATA.dataAttributeBoolean(state.element, 'd3pie-labels-lines-enabled', true),
-                style: NETDATA.dataAttribute(state.element, 'd3pie-labels-lines-style', "curved"),
-                color: NETDATA.dataAttribute(state.element, 'd3pie-labels-lines-color', "segment") // "segment" or a hex color
-            },
-            truncation: {
-                enabled: NETDATA.dataAttributeBoolean(state.element, 'd3pie-labels-truncation-enabled', false),
-                truncateLength: NETDATA.dataAttribute(state.element, 'd3pie-labels-truncation-truncatelength', 30)
-            },
-            formatter: function (context) {
-                // console.log(context);
-                if (context.part === 'value') {
-                    return state.legendFormatValue(context.value);
-                }
-                if (context.part === 'percentage') {
-                    return context.label + '%';
-                }
-
-                return context.label;
-            }
-        },
-        effects: {
-            load: {
-                effect: "none", // none / default
-                speed: 0 // commented in the d3pie code to speed it up
-            },
-            pullOutSegmentOnClick: {
-                effect: "bounce", // none / linear / bounce / elastic / back
-                speed: 400,
-                size: 5
-            },
-            highlightSegmentOnMouseover: true,
-            highlightLuminosity: -0.2
-        },
-        tooltips: {
-            enabled: false,
-            type: "placeholder", // caption|placeholder
-            string: "",
-            placeholderParser: null, // function
-            styles: {
-                fadeInSpeed: 250,
-                backgroundColor: NETDATA.themes.current.d3pie.tooltip_bg,
-                backgroundOpacity: 0.5,
-                color: NETDATA.themes.current.d3pie.tooltip_fg,
-                borderRadius: 2,
-                font: "arial",
-                fontSize: 12,
-                padding: 4
-            }
-        },
-        misc: {
-            colors: {
-                background: 'transparent', // transparent or color #
-                // segments: state.chartColors(),
-                segmentStroke: NETDATA.dataAttribute(state.element, 'd3pie-misc-colors-segmentstroke', NETDATA.themes.current.d3pie.segment_stroke)
-            },
-            gradient: {
-                enabled: NETDATA.dataAttributeBoolean(state.element, 'd3pie-misc-gradient-enabled', false),
-                percentage: NETDATA.dataAttribute(state.element, 'd3pie-misc-colors-percentage', 95),
-                color: NETDATA.dataAttribute(state.element, 'd3pie-misc-gradient-color', NETDATA.themes.current.d3pie.gradient_color)
-            },
-            canvasPadding: {
-                top: 5,
-                right: 5,
-                bottom: 5,
-                left: 5
-            },
-            pieCenterOffset: {
-                x: 0,
-                y: 0
-            },
-            cssPrefix: NETDATA.dataAttribute(state.element, 'd3pie-cssprefix', null)
-        },
-        callbacks: {
-            onload: null,
-            onMouseoverSegment: null,
-            onMouseoutSegment: null,
-            onClickSegment: null
-        }
-    };
-
-    state.d3pie_instance = new d3pie(state.element_chart, state.d3pie_options);
-    return true;
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// D3
-
-NETDATA.d3Initialize = function(callback) {
-    if (typeof netdataStopD3 === 'undefined' || !netdataStopD3) {
-        $.ajax({
-            url: NETDATA.d3_js,
-            cache: true,
-            dataType: "script",
-            xhrFields: { withCredentials: true } // required for the cookie
-        })
-        .done(function() {
-            NETDATA.registerChartLibrary('d3', NETDATA.d3_js);
-        })
-        .fail(function() {
-            NETDATA.chartLibraries.d3.enabled = false;
-            NETDATA.error(100, NETDATA.d3_js);
-        })
-        .always(function() {
-            if (typeof callback === "function")
-                return callback();
-        });
-    } else {
-        NETDATA.chartLibraries.d3.enabled = false;
-        if (typeof callback === "function")
-            return callback();
-    }
-};
-
-NETDATA.d3ChartUpdate = function(state, data) {
-    void(state);
-    void(data);
-
-    return false;
-};
-
-NETDATA.d3ChartCreate = function(state, data) {
-    void(state);
-    void(data);
-
-    return false;
-};
-
-// peity
-
-NETDATA.peityInitialize = function (callback) {
-    if (typeof netdataNoPeitys === 'undefined' || !netdataNoPeitys) {
-        $.ajax({
-            url: NETDATA.peity_js,
-            cache: true,
-            dataType: "script",
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function () {
-                NETDATA.registerChartLibrary('peity', NETDATA.peity_js);
-            })
-            .fail(function () {
-                NETDATA.chartLibraries.peity.enabled = false;
-                NETDATA.error(100, NETDATA.peity_js);
-            })
-            .always(function () {
-                if (typeof callback === "function") {
-                    return callback();
-                }
-            });
-    } else {
-        NETDATA.chartLibraries.peity.enabled = false;
-        if (typeof callback === "function") {
-            return callback();
-        }
-    }
-};
-
-NETDATA.peityChartUpdate = function (state, data) {
-    state.peity_instance.innerHTML = data.result;
-
-    if (state.peity_options.stroke !== state.chartCustomColors()[0]) {
-        state.peity_options.stroke = state.chartCustomColors()[0];
-        if (state.chart.chart_type === 'line') {
-            state.peity_options.fill = NETDATA.themes.current.background;
-        } else {
-            state.peity_options.fill = NETDATA.colorLuminance(state.chartCustomColors()[0], NETDATA.chartDefaults.fill_luminance);
-        }
-    }
-
-    $(state.peity_instance).peity('line', state.peity_options);
-    return true;
-};
-
-NETDATA.peityChartCreate = function (state, data) {
-    state.peity_instance = document.createElement('div');
-    state.element_chart.appendChild(state.peity_instance);
-
-    state.peity_options = {
-        stroke: NETDATA.themes.current.foreground,
-        strokeWidth: NETDATA.dataAttribute(state.element, 'peity-strokewidth', 1),
-        width: state.chartWidth(),
-        height: state.chartHeight(),
-        fill: NETDATA.themes.current.foreground
-    };
-
-    NETDATA.peityChartUpdate(state, data);
-    return true;
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// "Text-only" chart - Just renders the raw value to the DOM
-
-NETDATA.textOnlyCreate = function(state, data) {
-    var decimalPlaces = NETDATA.dataAttribute(state.element, 'textonly-decimal-places', 1);
-    var prefix = NETDATA.dataAttribute(state.element, 'textonly-prefix', '');
-    var suffix = NETDATA.dataAttribute(state.element, 'textonly-suffix', '');
-
-    // Round based on number of decimal places to show
-    var precision = Math.pow(10, decimalPlaces);
-    var value = Math.round(data.result[0] * precision) / precision;
-
-    state.element.textContent = prefix + value + suffix;
-    return true;
-}
-
-NETDATA.textOnlyUpdate = NETDATA.textOnlyCreate;
-// Charts Libraries Registration
-
-NETDATA.chartLibraries = {
-    "dygraph": {
-        initialize: NETDATA.dygraphInitialize,
-        create: NETDATA.dygraphChartCreate,
-        update: NETDATA.dygraphChartUpdate,
-        resize: function (state) {
-            if (typeof state.tmp.dygraph_instance !== 'undefined' && typeof state.tmp.dygraph_instance.resize === 'function') {
-                state.tmp.dygraph_instance.resize();
-            }
-        },
-        setSelection: NETDATA.dygraphSetSelection,
-        clearSelection: NETDATA.dygraphClearSelection,
-        toolboxPanAndZoom: NETDATA.dygraphToolboxPanAndZoom,
-        initialized: false,
-        enabled: true,
-        xssRegexIgnore: new RegExp('^/api/v1/data\.result.data$'),
-        format: function (state) {
-            void(state);
-            return 'json';
-        },
-        options: function (state) {
-            return 'ms' + '%7C' + 'flip' + (this.isLogScale(state) ? ('%7C' + 'abs') : '').toString();
-        },
-        legend: function (state) {
-            return (this.isSparkline(state) === false && NETDATA.dataAttributeBoolean(state.element, 'legend', true) === true) ? 'right-side' : null;
-        },
-        autoresize: function (state) {
-            void(state);
-            return true;
-        },
-        max_updates_to_recreate: function (state) {
-            void(state);
-            return 5000;
-        },
-        track_colors: function (state) {
-            void(state);
-            return true;
-        },
-        pixels_per_point: function (state) {
-            return (this.isSparkline(state) === false) ? 3 : 2;
-        },
-        isSparkline: function (state) {
-            if (typeof state.tmp.dygraph_sparkline === 'undefined') {
-                state.tmp.dygraph_sparkline = (this.theme(state) === 'sparkline');
-            }
-            return state.tmp.dygraph_sparkline;
-        },
-        isLogScale: function (state) {
-            if (typeof state.tmp.dygraph_logscale === 'undefined') {
-                state.tmp.dygraph_logscale = (this.theme(state) === 'logscale');
-            }
-            return state.tmp.dygraph_logscale;
-        },
-        theme: function (state) {
-            if (typeof state.tmp.dygraph_theme === 'undefined') {
-                state.tmp.dygraph_theme = NETDATA.dataAttribute(state.element, 'dygraph-theme', 'default');
-            }
-            return state.tmp.dygraph_theme;
-        },
-        container_class: function (state) {
-            if (this.legend(state) !== null) {
-                return 'netdata-container-with-legend';
-            }
-            return 'netdata-container';
-        }
-    },
-    "sparkline": {
-        initialize: NETDATA.sparklineInitialize,
-        create: NETDATA.sparklineChartCreate,
-        update: NETDATA.sparklineChartUpdate,
-        resize: null,
-        setSelection: undefined, // function(state, t) { void(state); return true; },
-        clearSelection: undefined, // function(state) { void(state); return true; },
-        toolboxPanAndZoom: null,
-        initialized: false,
-        enabled: true,
-        xssRegexIgnore: new RegExp('^/api/v1/data\.result$'),
-        format: function (state) {
-            void(state);
-            return 'array';
-        },
-        options: function (state) {
-            void(state);
-            return 'flip' + '%7C' + 'abs';
-        },
-        legend: function (state) {
-            void(state);
-            return null;
-        },
-        autoresize: function (state) {
-            void(state);
-            return false;
-        },
-        max_updates_to_recreate: function (state) {
-            void(state);
-            return 5000;
-        },
-        track_colors: function (state) {
-            void(state);
-            return false;
-        },
-        pixels_per_point: function (state) {
-            void(state);
-            return 3;
-        },
-        container_class: function (state) {
-            void(state);
-            return 'netdata-container';
-        }
-    },
-    "peity": {
-        initialize: NETDATA.peityInitialize,
-        create: NETDATA.peityChartCreate,
-        update: NETDATA.peityChartUpdate,
-        resize: null,
-        setSelection: undefined, // function(state, t) { void(state); return true; },
-        clearSelection: undefined, // function(state) { void(state); return true; },
-        toolboxPanAndZoom: null,
-        initialized: false,
-        enabled: true,
-        xssRegexIgnore: new RegExp('^/api/v1/data\.result$'),
-        format: function (state) {
-            void(state);
-            return 'ssvcomma';
-        },
-        options: function (state) {
-            void(state);
-            return 'null2zero' + '%7C' + 'flip' + '%7C' + 'abs';
-        },
-        legend: function (state) {
-            void(state);
-            return null;
-        },
-        autoresize: function (state) {
-            void(state);
-            return false;
-        },
-        max_updates_to_recreate: function (state) {
-            void(state);
-            return 5000;
-        },
-        track_colors: function (state) {
-            void(state);
-            return false;
-        },
-        pixels_per_point: function (state) {
-            void(state);
-            return 3;
-        },
-        container_class: function (state) {
-            void(state);
-            return 'netdata-container';
-        }
-    },
-    // "morris": {
-    //     initialize: NETDATA.morrisInitialize,
-    //     create: NETDATA.morrisChartCreate,
-    //     update: NETDATA.morrisChartUpdate,
-    //     resize: null,
-    //     setSelection: undefined, // function(state, t) { void(state); return true; },
-    //     clearSelection: undefined, // function(state) { void(state); return true; },
-    //     toolboxPanAndZoom: null,
-    //     initialized: false,
-    //     enabled: true,
-    //     xssRegexIgnore: new RegExp('^/api/v1/data\.result.data$'),
-    //     format: function(state) { void(state); return 'json'; },
-    //     options: function(state) { void(state); return 'objectrows' + '%7C' + 'ms'; },
-    //     legend: function(state) { void(state); return null; },
-    //     autoresize: function(state) { void(state); return false; },
-    //     max_updates_to_recreate: function(state) { void(state); return 50; },
-    //     track_colors: function(state) { void(state); return false; },
-    //     pixels_per_point: function(state) { void(state); return 15; },
-    //     container_class: function(state) { void(state); return 'netdata-container'; }
-    // },
-    "google": {
-        initialize: NETDATA.googleInitialize,
-        create: NETDATA.googleChartCreate,
-        update: NETDATA.googleChartUpdate,
-        resize: null,
-        setSelection: undefined, //function(state, t) { void(state); return true; },
-        clearSelection: undefined, //function(state) { void(state); return true; },
-        toolboxPanAndZoom: null,
-        initialized: false,
-        enabled: true,
-        xssRegexIgnore: new RegExp('^/api/v1/data\.result.rows$'),
-        format: function (state) {
-            void(state);
-            return 'datatable';
-        },
-        options: function (state) {
-            void(state);
-            return '';
-        },
-        legend: function (state) {
-            void(state);
-            return null;
-        },
-        autoresize: function (state) {
-            void(state);
-            return false;
-        },
-        max_updates_to_recreate: function (state) {
-            void(state);
-            return 300;
-        },
-        track_colors: function (state) {
-            void(state);
-            return false;
-        },
-        pixels_per_point: function (state) {
-            void(state);
-            return 4;
-        },
-        container_class: function (state) {
-            void(state);
-            return 'netdata-container';
-        }
-    },
-    // "raphael": {
-    //     initialize: NETDATA.raphaelInitialize,
-    //     create: NETDATA.raphaelChartCreate,
-    //     update: NETDATA.raphaelChartUpdate,
-    //     resize: null,
-    //     setSelection: undefined, // function(state, t) { void(state); return true; },
-    //     clearSelection: undefined, // function(state) { void(state); return true; },
-    //     toolboxPanAndZoom: null,
-    //     initialized: false,
-    //     enabled: true,
-    //     xssRegexIgnore: new RegExp('^/api/v1/data\.result.data$'),
-    //     format: function(state) { void(state); return 'json'; },
-    //     options: function(state) { void(state); return ''; },
-    //     legend: function(state) { void(state); return null; },
-    //     autoresize: function(state) { void(state); return false; },
-    //     max_updates_to_recreate: function(state) { void(state); return 5000; },
-    //     track_colors: function(state) { void(state); return false; },
-    //     pixels_per_point: function(state) { void(state); return 3; },
-    //     container_class: function(state) { void(state); return 'netdata-container'; }
-    // },
-    // "c3": {
-    //     initialize: NETDATA.c3Initialize,
-    //     create: NETDATA.c3ChartCreate,
-    //     update: NETDATA.c3ChartUpdate,
-    //     resize: null,
-    //     setSelection: undefined, // function(state, t) { void(state); return true; },
-    //     clearSelection: undefined, // function(state) { void(state); return true; },
-    //     toolboxPanAndZoom: null,
-    //     initialized: false,
-    //     enabled: true,
-    //     xssRegexIgnore: new RegExp('^/api/v1/data\.result$'),
-    //     format: function(state) { void(state); return 'csvjsonarray'; },
-    //     options: function(state) { void(state); return 'milliseconds'; },
-    //     legend: function(state) { void(state); return null; },
-    //     autoresize: function(state) { void(state); return false; },
-    //     max_updates_to_recreate: function(state) { void(state); return 5000; },
-    //     track_colors: function(state) { void(state); return false; },
-    //     pixels_per_point: function(state) { void(state); return 15; },
-    //     container_class: function(state) { void(state); return 'netdata-container'; }
-    // },
-    "d3pie": {
-        initialize: NETDATA.d3pieInitialize,
-        create: NETDATA.d3pieChartCreate,
-        update: NETDATA.d3pieChartUpdate,
-        resize: null,
-        setSelection: NETDATA.d3pieSetSelection,
-        clearSelection: NETDATA.d3pieClearSelection,
-        toolboxPanAndZoom: null,
-        initialized: false,
-        enabled: true,
-        xssRegexIgnore: new RegExp('^/api/v1/data\.result.data$'),
-        format: function (state) {
-            void(state);
-            return 'json';
-        },
-        options: function (state) {
-            void(state);
-            return 'objectrows' + '%7C' + 'ms';
-        },
-        legend: function (state) {
-            void(state);
-            return null;
-        },
-        autoresize: function (state) {
-            void(state);
-            return false;
-        },
-        max_updates_to_recreate: function (state) {
-            void(state);
-            return 5000;
-        },
-        track_colors: function (state) {
-            void(state);
-            return false;
-        },
-        pixels_per_point: function (state) {
-            void(state);
-            return 15;
-        },
-        container_class: function (state) {
-            void(state);
-            return 'netdata-container';
-        }
-    },
-    "d3": {
-        initialize: NETDATA.d3Initialize,
-        create: NETDATA.d3ChartCreate,
-        update: NETDATA.d3ChartUpdate,
-        resize: null,
-        setSelection: undefined, // function(state, t) { void(state); return true; },
-        clearSelection: undefined, // function(state) { void(state); return true; },
-        toolboxPanAndZoom: null,
-        initialized: false,
-        enabled: true,
-        xssRegexIgnore: new RegExp('^/api/v1/data\.result.data$'),
-        format: function (state) {
-            void(state);
-            return 'json';
-        },
-        options: function (state) {
-            void(state);
-            return '';
-        },
-        legend: function (state) {
-            void(state);
-            return null;
-        },
-        autoresize: function (state) {
-            void(state);
-            return false;
-        },
-        max_updates_to_recreate: function (state) {
-            void(state);
-            return 5000;
-        },
-        track_colors: function (state) {
-            void(state);
-            return false;
-        },
-        pixels_per_point: function (state) {
-            void(state);
-            return 3;
-        },
-        container_class: function (state) {
-            void(state);
-            return 'netdata-container';
-        }
-    },
-    "easypiechart": {
-        initialize: NETDATA.easypiechartInitialize,
-        create: NETDATA.easypiechartChartCreate,
-        update: NETDATA.easypiechartChartUpdate,
-        resize: null,
-        setSelection: NETDATA.easypiechartSetSelection,
-        clearSelection: NETDATA.easypiechartClearSelection,
-        toolboxPanAndZoom: null,
-        initialized: false,
-        enabled: true,
-        xssRegexIgnore: new RegExp('^/api/v1/data\.result$'),
-        format: function (state) {
-            void(state);
-            return 'array';
-        },
-        options: function (state) {
-            void(state);
-            return 'absolute';
-        },
-        legend: function (state) {
-            void(state);
-            return null;
-        },
-        autoresize: function (state) {
-            void(state);
-            return false;
-        },
-        max_updates_to_recreate: function (state) {
-            void(state);
-            return 5000;
-        },
-        track_colors: function (state) {
-            void(state);
-            return true;
-        },
-        pixels_per_point: function (state) {
-            void(state);
-            return 3;
-        },
-        aspect_ratio: 100,
-        container_class: function (state) {
-            void(state);
-            return 'netdata-container-easypiechart';
-        }
-    },
-    "gauge": {
-        initialize: NETDATA.gaugeInitialize,
-        create: NETDATA.gaugeChartCreate,
-        update: NETDATA.gaugeChartUpdate,
-        resize: null,
-        setSelection: NETDATA.gaugeSetSelection,
-        clearSelection: NETDATA.gaugeClearSelection,
-        toolboxPanAndZoom: null,
-        initialized: false,
-        enabled: true,
-        xssRegexIgnore: new RegExp('^/api/v1/data\.result$'),
-        format: function (state) {
-            void(state);
-            return 'array';
-        },
-        options: function (state) {
-            void(state);
-            return 'absolute';
-        },
-        legend: function (state) {
-            void(state);
-            return null;
-        },
-        autoresize: function (state) {
-            void(state);
-            return false;
-        },
-        max_updates_to_recreate: function (state) {
-            void(state);
-            return 5000;
-        },
-        track_colors: function (state) {
-            void(state);
-            return true;
-        },
-        pixels_per_point: function (state) {
-            void(state);
-            return 3;
-        },
-        aspect_ratio: 60,
-        container_class: function (state) {
-            void(state);
-            return 'netdata-container-gauge';
-        }
-    },
-    "textonly": {
-        autoresize: function (state) {
-            void(state);
-            return false;
-        },
-        container_class: function (state) {
-            void(state);
-            return 'netdata-container';
-        },
-        create: NETDATA.textOnlyCreate,
-        enabled: true,
-        format: function (state) {
-            void(state);
-            return 'array';
-        },
-        initialized: true,
-        initialize: function (callback) {
-            callback();
-        },
-        legend: function (state) {
-            void(state);
-            return null;
-        },
-        max_updates_to_recreate: function (state) {
-            void(state);
-            return 5000;
-        },
-        options: function (state) {
-            void(state);
-            return 'absolute';
-        },
-        pixels_per_point: function (state) {
-            void(state);
-            return 3;
-        },
-        track_colors: function (state) {
-            void(state);
-            return false;
-        },
-        update: NETDATA.textOnlyUpdate,
-        xssRegexIgnore: new RegExp('^/api/v1/data\.result$'),
-    }
-};
-
-NETDATA.registerChartLibrary = function (library, url) {
-    if (NETDATA.options.debug.libraries) {
-        console.log("registering chart library: " + library);
-    }
-
-    NETDATA.chartLibraries[library].url = url;
-    NETDATA.chartLibraries[library].initialized = true;
-    NETDATA.chartLibraries[library].enabled = true;
-};
-
-// *** src/dashboard.js/chart-registry.js
-
-// Chart Registry
-
-// When multiple charts need the same chart, we avoid downloading it
-// multiple times (and having it in browser memory multiple time)
-// by using this registry.
-
-// Every time we download a chart definition, we save it here with .add()
-// Then we try to get it back with .get(). If that fails, we download it.
-
-NETDATA.fixHost = function (host) {
-    while (host.slice(-1) === '/') {
-        host = host.substring(0, host.length - 1);
-    }
-
-    return host;
-};
-
-NETDATA.chartRegistry = {
-    charts: {},
-
-    globalReset: function () {
-        this.charts = {};
-    },
-
-    add: function (host, id, data) {
-        if (typeof this.charts[host] === 'undefined') {
-            this.charts[host] = {};
-        }
-
-        //console.log('added ' + host + '/' + id);
-        this.charts[host][id] = data;
-    },
-
-    get: function (host, id) {
-        if (typeof this.charts[host] === 'undefined') {
-            return null;
-        }
-
-        if (typeof this.charts[host][id] === 'undefined') {
-            return null;
-        }
-
-        //console.log('cached ' + host + '/' + id);
-        return this.charts[host][id];
-    },
-
-    downloadAll: function (host, callback) {
-        host = NETDATA.fixHost(host);
-
-        let self = this;
-
-        function got_data(h, data, callback) {
-            if (data !== null) {
-                self.charts[h] = data.charts;
-
-                // update the server timezone in our options
-                if (typeof data.timezone === 'string') {
-                    NETDATA.options.server_timezone = data.timezone;
-                }
-            } else {
-                NETDATA.error(406, h + '/api/v1/charts');
-            }
-
-            if (typeof callback === 'function') {
-                callback(data);
-            }
-        }
-
-        if (netdataSnapshotData !== null) {
-            got_data(host, netdataSnapshotData.charts, callback);
-        } else {
-            $.ajax({
-                url: host + '/api/v1/charts',
-                async: true,
-                cache: false,
-                xhrFields: {withCredentials: true} // required for the cookie
-            })
-                .done(function (data) {
-                    data = NETDATA.xss.checkOptional('/api/v1/charts', data);
-                    got_data(host, data, callback);
-                })
-                .fail(function () {
-                    NETDATA.error(405, host + '/api/v1/charts');
-
-                    if (typeof callback === 'function') {
-                        callback(null);
-                    }
-                });
-        }
-    }
-};
-
-// Compute common (joint) values over multiple charts.
-
-
-// commonMin & commonMax
-
-NETDATA.commonMin = {
-    keys: {},
-    latest: {},
-
-    globalReset: function () {
-        this.keys = {};
-        this.latest = {};
-    },
-
-    get: function (state) {
-        if (typeof state.tmp.__commonMin === 'undefined') {
-            // get the commonMin setting
-            state.tmp.__commonMin = NETDATA.dataAttribute(state.element, 'common-min', null);
-        }
-
-        let min = state.data.min;
-        let name = state.tmp.__commonMin;
-
-        if (name === null) {
-            // we don't need commonMin
-            //state.log('no need for commonMin');
-            return min;
-        }
-
-        let t = this.keys[name];
-        if (typeof t === 'undefined') {
-            // add our commonMin
-            this.keys[name] = {};
-            t = this.keys[name];
-        }
-
-        let uuid = state.uuid;
-        if (typeof t[uuid] !== 'undefined') {
-            if (t[uuid] === min) {
-                //state.log('commonMin ' + state.tmp.__commonMin + ' not changed: ' + this.latest[name]);
-                return this.latest[name];
-            } else if (min < this.latest[name]) {
-                //state.log('commonMin ' + state.tmp.__commonMin + ' increased: ' + min);
-                t[uuid] = min;
-                this.latest[name] = min;
-                return min;
-            }
-        }
-
-        // add our min
-        t[uuid] = min;
-
-        // find the common min
-        let m = min;
-        // for (let i in t) {
-        //     if (t.hasOwnProperty(i) && t[i] < m) m = t[i];
-        // }
-        for (var ti of Object.values(t)) {
-            if (ti < m) {
-                m = ti;
-            }
-        }
-
-        //state.log('commonMin ' + state.tmp.__commonMin + ' updated: ' + m);
-        this.latest[name] = m;
-        return m;
-    }
-};
-
-NETDATA.commonMax = {
-    keys: {},
-    latest: {},
-
-    globalReset: function () {
-        this.keys = {};
-        this.latest = {};
-    },
-
-    get: function (state) {
-        if (typeof state.tmp.__commonMax === 'undefined') {
-            // get the commonMax setting
-            state.tmp.__commonMax = NETDATA.dataAttribute(state.element, 'common-max', null);
-        }
-
-        let max = state.data.max;
-        let name = state.tmp.__commonMax;
-
-        if (name === null) {
-            // we don't need commonMax
-            //state.log('no need for commonMax');
-            return max;
-        }
-
-        let t = this.keys[name];
-        if (typeof t === 'undefined') {
-            // add our commonMax
-            this.keys[name] = {};
-            t = this.keys[name];
-        }
-
-        let uuid = state.uuid;
-        if (typeof t[uuid] !== 'undefined') {
-            if (t[uuid] === max) {
-                //state.log('commonMax ' + state.tmp.__commonMax + ' not changed: ' + this.latest[name]);
-                return this.latest[name];
-            } else if (max > this.latest[name]) {
-                //state.log('commonMax ' + state.tmp.__commonMax + ' increased: ' + max);
-                t[uuid] = max;
-                this.latest[name] = max;
-                return max;
-            }
-        }
-
-        // add our max
-        t[uuid] = max;
-
-        // find the common max
-        let m = max;
-        // for (let i in t) {
-        //     if (t.hasOwnProperty(i) && t[i] > m) m = t[i];
-        // }
-        for (var ti of Object.values(t)) {
-            if (ti > m) {
-                m = ti;
-            }
-        }
-
-        //state.log('commonMax ' + state.tmp.__commonMax + ' updated: ' + m);
-        this.latest[name] = m;
-        return m;
-    }
-};
-
-NETDATA.commonColors = {
-    keys: {},
-
-    globalReset: function () {
-        this.keys = {};
-    },
-
-    get: function (state, label) {
-        let ret = this.refill(state);
-
-        if (typeof ret.assigned[label] === 'undefined') {
-            ret.assigned[label] = ret.available.shift();
-        }
-
-        return ret.assigned[label];
-    },
-
-    refill: function (state) {
-        let ret, len;
-
-        if (typeof state.tmp.__commonColors === 'undefined') {
-            ret = this.prepare(state);
-        } else {
-            ret = this.keys[state.tmp.__commonColors];
-            if (typeof ret === 'undefined') {
-                ret = this.prepare(state);
-            }
-        }
-
-        if (ret.available.length === 0) {
-            if (ret.copy_theme || ret.custom.length === 0) {
-                // copy the theme colors
-                len = NETDATA.themes.current.colors.length;
-                while (len--) {
-                    ret.available.unshift(NETDATA.themes.current.colors[len]);
-                }
-            }
-
-            // copy the custom colors
-            len = ret.custom.length;
-            while (len--) {
-                ret.available.unshift(ret.custom[len]);
-            }
-        }
-
-        state.colors_assigned = ret.assigned;
-        state.colors_available = ret.available;
-        state.colors_custom = ret.custom;
-
-        return ret;
-    },
-
-    __read_custom_colors: function (state, ret) {
-        // add the user supplied colors
-        let c = NETDATA.dataAttribute(state.element, 'colors', undefined);
-        if (typeof c === 'string' && c.length > 0) {
-            c = c.split(' ');
-            let len = c.length;
-
-            if (len > 0 && c[len - 1] === 'ONLY') {
-                len--;
-                ret.copy_theme = false;
-            }
-
-            while (len--) {
-                ret.custom.unshift(c[len]);
-            }
-        }
-    },
-
-    prepare: function (state) {
-        let has_custom_colors = false;
-
-        if (typeof state.tmp.__commonColors === 'undefined') {
-            let defname = state.chart.context;
-
-            // if this chart has data-colors=""
-            // we should use the chart uuid as the default key (private palette)
-            // (data-common-colors="NAME" will be used anyways)
-            let c = NETDATA.dataAttribute(state.element, 'colors', undefined);
-            if (typeof c === 'string' && c.length > 0) {
-                defname = state.uuid;
-                has_custom_colors = true;
-            }
-
-            // get the commonColors setting
-            state.tmp.__commonColors = NETDATA.dataAttribute(state.element, 'common-colors', defname);
-        }
-
-        let name = state.tmp.__commonColors;
-        let ret = this.keys[name];
-
-        if (typeof ret === 'undefined') {
-            // add our commonMax
-            this.keys[name] = {
-                assigned: {},       // name-value of dimensions and their colors
-                available: [],      // an array of colors available to be used
-                custom: [],         // the array of colors defined by the user
-                charts: {},         // the charts linked to this
-                copy_theme: true
-            };
-            ret = this.keys[name];
-        }
-
-        if (typeof ret.charts[state.uuid] === 'undefined') {
-            ret.charts[state.uuid] = state;
-
-            if (has_custom_colors) {
-                this.__read_custom_colors(state, ret);
-            }
-        }
-
-        return ret;
-    }
-};
-
-// *** src/dashboard.js/main.js
-
-// Codacy declarations
-/* global clipboard */
-/* global Ps */
-
-if (NETDATA.options.debug.main_loop) {
-    console.log('welcome to NETDATA');
-}
-
-NETDATA.onresizeCallback = null;
-NETDATA.onresize = function () {
-    NETDATA.options.last_page_resize = Date.now();
-    NETDATA.onscroll();
-
-    if (typeof NETDATA.onresizeCallback === 'function') {
-        NETDATA.onresizeCallback();
-    }
-};
-
-NETDATA.abortAllRefreshes = function () {
-    let targets = NETDATA.options.targets;
-    let len = targets.length;
-
-    while (len--) {
-        if (targets[len].fetching_data) {
-            if (typeof targets[len].xhr !== 'undefined') {
-                targets[len].xhr.abort();
-                targets[len].running = false;
-                targets[len].fetching_data = false;
-            }
-        }
-    }
-};
-
-NETDATA.onscrollStartDelay = function () {
-    NETDATA.options.last_page_scroll = Date.now();
-
-    NETDATA.options.on_scroll_refresher_stop_until =
-        NETDATA.options.last_page_scroll
-        + (NETDATA.options.current.async_on_scroll ? 1000 : 0);
-};
-
-NETDATA.onscrollEndDelay = function () {
-    NETDATA.options.on_scroll_refresher_stop_until =
-        Date.now()
-        + (NETDATA.options.current.async_on_scroll ? NETDATA.options.current.onscroll_worker_duration_threshold : 0);
-};
-
-NETDATA.onscroll_updater_timeout_id = undefined;
-NETDATA.onscrollUpdater = function () {
-    NETDATA.globalSelectionSync.stop();
-
-    if (NETDATA.options.abort_ajax_on_scroll) {
-        NETDATA.abortAllRefreshes();
-    }
-
-    // when the user scrolls he sees that we have
-    // hidden all the not-visible charts
-    // using this little function we try to switch
-    // the charts back to visible quickly
-
-    if (!NETDATA.intersectionObserver.enabled()) {
-        if (!NETDATA.options.current.parallel_refresher) {
-            let targets = NETDATA.options.targets;
-            let len = targets.length;
-
-            while (len--) {
-                if (!targets[len].running) {
-                    targets[len].isVisible();
-                }
-            }
-        }
-    }
-
-    NETDATA.onscrollEndDelay();
-};
-
-NETDATA.scrollUp = false;
-NETDATA.scrollY = window.scrollY;
-NETDATA.onscroll = function () {
-    //console.log('onscroll() begin');
-
-    NETDATA.onscrollStartDelay();
-    NETDATA.chartRefresherReschedule();
-
-    NETDATA.scrollUp = (window.scrollY > NETDATA.scrollY);
-    NETDATA.scrollY = window.scrollY;
-
-    if (NETDATA.onscroll_updater_timeout_id) {
-        NETDATA.timeout.clear(NETDATA.onscroll_updater_timeout_id);
-    }
-
-    NETDATA.onscroll_updater_timeout_id = NETDATA.timeout.set(NETDATA.onscrollUpdater, 0);
-    //console.log('onscroll() end');
-};
-
-NETDATA.supportsPassiveEvents = function () {
-    if (NETDATA.options.passive_events === null) {
-        let supportsPassive = false;
-        try {
-            let opts = Object.defineProperty({}, 'passive', {
-                get: function () {
-                    supportsPassive = true;
-                }
-            });
-            window.addEventListener("test", null, opts);
-        } catch (e) {
-            console.log('browser does not support passive events');
-        }
-
-        NETDATA.options.passive_events = supportsPassive;
-    }
-
-    // console.log('passive ' + NETDATA.options.passive_events);
-    return NETDATA.options.passive_events;
-};
-
-window.addEventListener('resize', NETDATA.onresize, NETDATA.supportsPassiveEvents() ? {passive: true} : false);
-window.addEventListener('scroll', NETDATA.onscroll, NETDATA.supportsPassiveEvents() ? {passive: true} : false);
-// window.onresize = NETDATA.onresize;
-// window.onscroll = NETDATA.onscroll;
-
-// ----------------------------------------------------------------------------------------------------------------
-// Global Pan and Zoom on charts
-
-// Using this structure are synchronize all the charts, so that
-// when you pan or zoom one, all others are automatically refreshed
-// to the same timespan.
-
-NETDATA.globalPanAndZoom = {
-    seq: 0,                 // timestamp ms
-                            // every time a chart is panned or zoomed
-                            // we set the timestamp here
-                            // then we use it as a sequence number
-                            // to find if other charts are synchronized
-                            // to this time-range
-
-    master: null,           // the master chart (state), to which all others
-                            // are synchronized
-
-    force_before_ms: null,  // the timespan to sync all other charts
-    force_after_ms: null,
-
-    callback: null,
-
-    globalReset: function () {
-        this.clearMaster();
-        this.seq = 0;
-        this.master = null;
-        this.force_after_ms = null;
-        this.force_before_ms = null;
-        this.callback = null;
-    },
-
-    delay: function () {
-        if (NETDATA.options.debug.globalPanAndZoom) {
-            console.log('globalPanAndZoom.delay()');
-        }
-
-        NETDATA.options.auto_refresher_stop_until = Date.now() + NETDATA.options.current.global_pan_sync_time;
-    },
-
-    // set a new master
-    setMaster: function (state, after, before) {
-        this.delay();
-
-        if (!NETDATA.options.current.sync_pan_and_zoom) {
-            return;
-        }
-
-        if (this.master === null) {
-            if (NETDATA.options.debug.globalPanAndZoom) {
-                console.log('globalPanAndZoom.setMaster(' + state.id + ', ' + after + ', ' + before + ') SET MASTER');
-            }
-        } else if (this.master !== state) {
-            if (NETDATA.options.debug.globalPanAndZoom) {
-                console.log('globalPanAndZoom.setMaster(' + state.id + ', ' + after + ', ' + before + ') CHANGED MASTER');
-            }
-
-            this.master.resetChart(true, true);
-        }
-
-        let now = Date.now();
-        this.master = state;
-        this.seq = now;
-        this.force_after_ms = after;
-        this.force_before_ms = before;
-
-        if (typeof this.callback === 'function') {
-            this.callback(true, after, before);
-        }
-    },
-
-    // clear the master
-    clearMaster: function () {
-        // if (NETDATA.options.debug.globalPanAndZoom === true)
-        //     console.log('globalPanAndZoom.clearMaster()');
-        if (NETDATA.options.debug.globalPanAndZoom) {
-            console.log('globalPanAndZoom.clearMaster()');
-        }
-
-        if (this.master !== null) {
-            let st = this.master;
-            this.master = null;
-            st.resetChart();
-        }
-
-        this.master = null;
-        this.seq = 0;
-        this.force_after_ms = null;
-        this.force_before_ms = null;
-        NETDATA.options.auto_refresher_stop_until = 0;
-
-        if (typeof this.callback === 'function') {
-            this.callback(false, 0, 0);
-        }
-    },
-
-    // is the given state the master of the global
-    // pan and zoom sync?
-    isMaster: function (state) {
-        return (this.master === state);
-    },
-
-    // are we currently have a global pan and zoom sync?
-    isActive: function () {
-        return (this.master !== null && this.force_before_ms !== null && this.force_after_ms !== null && this.seq !== 0);
-    },
-
-    // check if a chart, other than the master
-    // needs to be refreshed, due to the global pan and zoom
-    shouldBeAutoRefreshed: function (state) {
-        if (this.master === null || this.seq === 0) {
-            return false;
-        }
-
-        //if (state.needsRecreation())
-        //  return true;
-
-        return (state.tm.pan_and_zoom_seq !== this.seq);
-    }
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// global chart underlay (time-frame highlighting)
-
-NETDATA.globalChartUnderlay = {
-    callback: null,         // what to call when a highlighted range is setup
-    after: null,            // highlight after this time
-    before: null,           // highlight before this time
-    view_after: null,       // the charts after_ms viewport when the highlight was setup
-    view_before: null,      // the charts before_ms viewport, when the highlight was setup
-    state: null,            // the chart the highlight was setup
-
-    isActive: function () {
-        return (this.after !== null && this.before !== null);
-    },
-
-    hasViewport: function () {
-        return (this.state !== null && this.view_after !== null && this.view_before !== null);
-    },
-
-    init: function (state, after, before, view_after, view_before) {
-        this.state = (typeof state !== 'undefined') ? state : null;
-        this.after = (typeof after !== 'undefined' && after !== null && after > 0) ? after : null;
-        this.before = (typeof before !== 'undefined' && before !== null && before > 0) ? before : null;
-        this.view_after = (typeof view_after !== 'undefined' && view_after !== null && view_after > 0) ? view_after : null;
-        this.view_before = (typeof view_before !== 'undefined' && view_before !== null && view_before > 0) ? view_before : null;
-    },
-
-    setup: function () {
-        if (this.isActive()) {
-            if (this.state === null) {
-                this.state = NETDATA.options.targets[0];
-            }
-
-            if (typeof this.callback === 'function') {
-                this.callback(true, this.after, this.before);
-            }
-        } else {
-            if (typeof this.callback === 'function') {
-                this.callback(false, 0, 0);
-            }
-        }
-    },
-
-    set: function (state, after, before, view_after, view_before) {
-        if (after > before) {
-            let t = after;
-            after = before;
-            before = t;
-        }
-
-        this.init(state, after, before, view_after, view_before);
-
-        // if (this.hasViewport() === true)
-        //     NETDATA.globalPanAndZoom.setMaster(this.state, this.view_after, this.view_before);
-        if (this.hasViewport()) {
-            NETDATA.globalPanAndZoom.setMaster(this.state, this.view_after, this.view_before);
-        }
-
-        this.setup();
-    },
-
-    clear: function () {
-        this.after = null;
-        this.before = null;
-        this.state = null;
-        this.view_after = null;
-        this.view_before = null;
-
-        if (typeof this.callback === 'function') {
-            this.callback(false, 0, 0);
-        }
-    },
-
-    focus: function () {
-        if (this.isActive() && this.hasViewport()) {
-            if (this.state === null) {
-                this.state = NETDATA.options.targets[0];
-            }
-
-            if (NETDATA.globalPanAndZoom.isMaster(this.state)) {
-                NETDATA.globalPanAndZoom.clearMaster();
-            }
-
-            NETDATA.globalPanAndZoom.setMaster(this.state, this.view_after, this.view_before, true);
-        }
-    }
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// dimensions selection
-
-// TODO
-// move color assignment to dimensions, here
-
-let dimensionStatus = function (parent, label, name_div, value_div, color) {
-    this.enabled = false;
-    this.parent = parent;
-    this.label = label;
-    this.name_div = null;
-    this.value_div = null;
-    this.color = NETDATA.themes.current.foreground;
-    this.selected = (parent.unselected_count === 0);
-
-    this.setOptions(name_div, value_div, color);
-};
-
-dimensionStatus.prototype.invalidate = function () {
-    this.name_div = null;
-    this.value_div = null;
-    this.enabled = false;
-};
-
-dimensionStatus.prototype.setOptions = function (name_div, value_div, color) {
-    this.color = color;
-
-    if (this.name_div !== name_div) {
-        this.name_div = name_div;
-        this.name_div.title = this.label;
-        this.name_div.style.setProperty('color', this.color, 'important');
-        if (!this.selected) {
-            this.name_div.className = 'netdata-legend-name not-selected';
-        } else {
-            this.name_div.className = 'netdata-legend-name selected';
-        }
-    }
-
-    if (this.value_div !== value_div) {
-        this.value_div = value_div;
-        this.value_div.title = this.label;
-        this.value_div.style.setProperty('color', this.color, 'important');
-        if (!this.selected) {
-            this.value_div.className = 'netdata-legend-value not-selected';
-        } else {
-            this.value_div.className = 'netdata-legend-value selected';
-        }
-    }
-
-    this.enabled = true;
-    this.setHandler();
-};
-
-dimensionStatus.prototype.setHandler = function () {
-    if (!this.enabled) {
-        return;
-    }
-
-    let ds = this;
-
-    // this.name_div.onmousedown = this.value_div.onmousedown = function(e) {
-    this.name_div.onclick = this.value_div.onclick = function (e) {
-        e.preventDefault();
-        if (ds.isSelected()) {
-            // this is selected
-            if (e.shiftKey || e.ctrlKey) {
-                // control or shift key is pressed -> unselect this (except is none will remain selected, in which case select all)
-                ds.unselect();
-
-                if (ds.parent.countSelected() === 0) {
-                    ds.parent.selectAll();
-                }
-            } else {
-                // no key is pressed -> select only this (except if it is the only selected already, in which case select all)
-                if (ds.parent.countSelected() === 1) {
-                    ds.parent.selectAll();
-                } else {
-                    ds.parent.selectNone();
-                    ds.select();
-                }
-            }
-        }
-        else {
-            // this is not selected
-            if (e.shiftKey || e.ctrlKey) {
-                // control or shift key is pressed -> select this too
-                ds.select();
-            } else {
-                // no key is pressed -> select only this
-                ds.parent.selectNone();
-                ds.select();
-            }
-        }
-
-        ds.parent.state.redrawChart();
-    }
-};
-
-dimensionStatus.prototype.select = function () {
-    if (!this.enabled) {
-        return;
-    }
-
-    this.name_div.className = 'netdata-legend-name selected';
-    this.value_div.className = 'netdata-legend-value selected';
-    this.selected = true;
-};
-
-dimensionStatus.prototype.unselect = function () {
-    if (!this.enabled) {
-        return;
-    }
-
-    this.name_div.className = 'netdata-legend-name not-selected';
-    this.value_div.className = 'netdata-legend-value hidden';
-    this.selected = false;
-};
-
-dimensionStatus.prototype.isSelected = function () {
-    // return(this.enabled === true && this.selected === true);
-    return this.enabled && this.selected;
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-
-let dimensionsVisibility = function (state) {
-    this.state = state;
-    this.len = 0;
-    this.dimensions = {};
-    this.selected_count = 0;
-    this.unselected_count = 0;
-};
-
-dimensionsVisibility.prototype.dimensionAdd = function (label, name_div, value_div, color) {
-    if (typeof this.dimensions[label] === 'undefined') {
-        this.len++;
-        this.dimensions[label] = new dimensionStatus(this, label, name_div, value_div, color);
-    } else {
-        this.dimensions[label].setOptions(name_div, value_div, color);
-    }
-
-    return this.dimensions[label];
-};
-
-dimensionsVisibility.prototype.dimensionGet = function (label) {
-    return this.dimensions[label];
-};
-
-dimensionsVisibility.prototype.invalidateAll = function () {
-    let keys = Object.keys(this.dimensions);
-    let len = keys.length;
-    while (len--) {
-        this.dimensions[keys[len]].invalidate();
-    }
-};
-
-dimensionsVisibility.prototype.selectAll = function () {
-    let keys = Object.keys(this.dimensions);
-    let len = keys.length;
-    while (len--) {
-        this.dimensions[keys[len]].select();
-    }
-};
-
-dimensionsVisibility.prototype.countSelected = function () {
-    let selected = 0;
-    let keys = Object.keys(this.dimensions);
-    let len = keys.length;
-    while (len--) {
-        if (this.dimensions[keys[len]].isSelected()) {
-            selected++;
-        }
-    }
-
-    return selected;
-};
-
-dimensionsVisibility.prototype.selectNone = function () {
-    let keys = Object.keys(this.dimensions);
-    let len = keys.length;
-    while (len--) {
-        this.dimensions[keys[len]].unselect();
-    }
-};
-
-dimensionsVisibility.prototype.selected2BooleanArray = function (array) {
-    let ret = [];
-    this.selected_count = 0;
-    this.unselected_count = 0;
-
-    let len = array.length;
-    while (len--) {
-        let ds = this.dimensions[array[len]];
-        if (typeof ds === 'undefined') {
-            // console.log(array[i] + ' is not found');
-            ret.unshift(false);
-        } else if (ds.isSelected()) {
-            ret.unshift(true);
-            this.selected_count++;
-        } else {
-            ret.unshift(false);
-            this.unselected_count++;
-        }
-    }
-
-    if (this.selected_count === 0 && this.unselected_count !== 0) {
-        this.selectAll();
-        return this.selected2BooleanArray(array);
-    }
-
-    return ret;
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// date/time conversion
-
-NETDATA.dateTime = {
-    using_timezone: false,
-
-    // these are the old netdata functions
-    // we fallback to these, if the new ones fail
-
-    localeDateStringNative: function (d) {
-        return d.toLocaleDateString();
-    },
-
-    localeTimeStringNative: function (d) {
-        return d.toLocaleTimeString();
-    },
-
-    xAxisTimeStringNative: function (d) {
-        return NETDATA.zeropad(d.getHours()) + ":"
-            + NETDATA.zeropad(d.getMinutes()) + ":"
-            + NETDATA.zeropad(d.getSeconds());
-    },
-
-    // initialize the new date/time conversion
-    // functions.
-    // if this fails, we fallback to the above
-    init: function (timezone) {
-        //console.log('init with timezone: ' + timezone);
-
-        // detect browser timezone
-        try {
-            NETDATA.options.browser_timezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
-        } catch (e) {
-            console.log('failed to detect browser timezone: ' + e.toString());
-            NETDATA.options.browser_timezone = 'cannot-detect-it';
-        }
-
-        let ret = false;
-
-        try {
-            let dateOptions = {
-                localeMatcher: 'best fit',
-                formatMatcher: 'best fit',
-                weekday: 'short',
-                year: 'numeric',
-                month: 'short',
-                day: '2-digit'
-            };
-
-            let timeOptions = {
-                localeMatcher: 'best fit',
-                hour12: false,
-                formatMatcher: 'best fit',
-                hour: '2-digit',
-                minute: '2-digit',
-                second: '2-digit'
-            };
-
-            let xAxisOptions = {
-                localeMatcher: 'best fit',
-                hour12: false,
-                formatMatcher: 'best fit',
-                hour: '2-digit',
-                minute: '2-digit',
-                second: '2-digit'
-            };
-
-            if (typeof timezone === 'string' && timezone !== '' && timezone !== 'default') {
-                dateOptions.timeZone = timezone;
-                timeOptions.timeZone = timezone;
-                timeOptions.timeZoneName = 'short';
-                xAxisOptions.timeZone = timezone;
-                this.using_timezone = true;
-            } else {
-                timezone = 'default';
-                this.using_timezone = false;
-            }
-
-            this.dateFormat = new Intl.DateTimeFormat(navigator.language, dateOptions);
-            this.timeFormat = new Intl.DateTimeFormat(navigator.language, timeOptions);
-            this.xAxisFormat = new Intl.DateTimeFormat(navigator.language, xAxisOptions);
-
-            this.localeDateString = function (d) {
-                return this.dateFormat.format(d);
-            };
-
-            this.localeTimeString = function (d) {
-                return this.timeFormat.format(d);
-            };
-
-            this.xAxisTimeString = function (d) {
-                return this.xAxisFormat.format(d);
-            };
-
-            //let d = new Date();
-            //let t = this.dateFormat.format(d) + ' ' + this.timeFormat.format(d) + ' ' + this.xAxisFormat.format(d);
-
-            ret = true;
-        } catch (e) {
-            console.log('Cannot setup Date/Time formatting: ' + e.toString());
-
-            timezone = 'default';
-            this.localeDateString = this.localeDateStringNative;
-            this.localeTimeString = this.localeTimeStringNative;
-            this.xAxisTimeString = this.xAxisTimeStringNative;
-            this.using_timezone = false;
-
-            ret = false;
-        }
-
-        // save it
-        //console.log('init setOption timezone: ' + timezone);
-        NETDATA.setOption('timezone', timezone);
-
-        return ret;
-    }
-};
-NETDATA.dateTime.init(NETDATA.options.current.timezone);
-
-// ----------------------------------------------------------------------------------------------------------------
-// global selection sync
-
-NETDATA.globalSelectionSync = {
-    state: null,
-    dontSyncBefore: 0,
-    last_t: 0,
-    slaves: [],
-    timeoutId: undefined,
-
-    globalReset: function () {
-        this.stop();
-        this.state = null;
-        this.dontSyncBefore = 0;
-        this.last_t = 0;
-        this.slaves = [];
-        this.timeoutId = undefined;
-    },
-
-    active: function () {
-        return (this.state !== null);
-    },
-
-    // return true if global selection sync can be enabled now
-    enabled: function () {
-        // console.log('enabled()');
-        // can we globally apply selection sync?
-        if (!NETDATA.options.current.sync_selection) {
-            return false;
-        }
-
-        return (this.dontSyncBefore <= Date.now());
-    },
-
-    // set the global selection sync master
-    setMaster: function (state) {
-        if (!this.enabled()) {
-            this.stop();
-            return;
-        }
-
-        if (this.state === state) {
-            return;
-        }
-
-        if (this.state !== null) {
-            this.stop();
-        }
-
-        if (NETDATA.options.debug.globalSelectionSync) {
-            console.log('globalSelectionSync.setMaster(' + state.id + ')');
-        }
-
-        state.selected = true;
-        this.state = state;
-        this.last_t = 0;
-
-        // find all slaves
-        let targets = NETDATA.intersectionObserver.targets();
-        this.slaves = [];
-        let len = targets.length;
-        while (len--) {
-            let st = targets[len];
-            if (this.state !== st && st.globalSelectionSyncIsEligible()) {
-                this.slaves.push(st);
-            }
-        }
-
-        // this.delay(100);
-    },
-
-    // stop global selection sync
-    stop: function () {
-        if (this.state !== null) {
-            if (NETDATA.options.debug.globalSelectionSync) {
-                console.log('globalSelectionSync.stop()');
-            }
-
-            let len = this.slaves.length;
-            while (len--) {
-                this.slaves[len].clearSelection();
-            }
-
-            this.state.clearSelection();
-
-            this.last_t = 0;
-            this.slaves = [];
-            this.state = null;
-        }
-    },
-
-    // delay global selection sync for some time
-    delay: function (ms) {
-        if (NETDATA.options.current.sync_selection) {
-            // if (NETDATA.options.debug.globalSelectionSync === true) {
-            if (NETDATA.options.debug.globalSelectionSync) {
-                console.log('globalSelectionSync.delay()');
-            }
-
-            if (typeof ms === 'number') {
-                this.dontSyncBefore = Date.now() + ms;
-            } else {
-                this.dontSyncBefore = Date.now() + NETDATA.options.current.sync_selection_delay;
-            }
-        }
-    },
-
-    __syncSlaves: function () {
-        // if (NETDATA.globalSelectionSync.enabled() === true) {
-        if (NETDATA.globalSelectionSync.enabled()) {
-            // if (NETDATA.options.debug.globalSelectionSync === true)
-            if (NETDATA.options.debug.globalSelectionSync) {
-                console.log('globalSelectionSync.__syncSlaves()');
-            }
-
-            let t = NETDATA.globalSelectionSync.last_t;
-            let len = NETDATA.globalSelectionSync.slaves.length;
-            while (len--) {
-                NETDATA.globalSelectionSync.slaves[len].setSelection(t);
-            }
-
-            this.timeoutId = undefined;
-        }
-    },
-
-    // sync all the visible charts to the given time
-    // this is to be called from the chart libraries
-    sync: function (state, t) {
-        // if (NETDATA.options.current.sync_selection === true) {
-        if (NETDATA.options.current.sync_selection) {
-            // if (NETDATA.options.debug.globalSelectionSync === true)
-            if (NETDATA.options.debug.globalSelectionSync) {
-                console.log('globalSelectionSync.sync(' + state.id + ', ' + t.toString() + ')');
-            }
-
-            this.setMaster(state);
-
-            if (t === this.last_t) {
-                return;
-            }
-
-            this.last_t = t;
-
-            if (state.foreignElementSelection !== null) {
-                state.foreignElementSelection.innerText = NETDATA.dateTime.localeDateString(t) + ' ' + NETDATA.dateTime.localeTimeString(t);
-            }
-
-            if (this.timeoutId) {
-                NETDATA.timeout.clear(this.timeoutId);
-            }
-
-            this.timeoutId = NETDATA.timeout.set(this.__syncSlaves, 0);
-        }
-    }
-};
-
-NETDATA.intersectionObserver = {
-    observer: null,
-    visible_targets: [],
-
-    options: {
-        root: null,
-        rootMargin: "0px",
-        threshold: null
-    },
-
-    enabled: function () {
-        return this.observer !== null;
-    },
-
-    globalReset: function () {
-        if (this.observer !== null) {
-            this.visible_targets = [];
-            this.observer.disconnect();
-            this.init();
-        }
-    },
-
-    targets: function () {
-        if (this.enabled() && this.visible_targets.length > 0) {
-            return this.visible_targets;
-        } else {
-            return NETDATA.options.targets;
-        }
-    },
-
-    switchChartVisibility: function () {
-        let old = this.__visibilityRatioOld;
-
-        if (old !== this.__visibilityRatio) {
-            if (old === 0 && this.__visibilityRatio > 0) {
-                this.unhideChart();
-            } else if (old > 0 && this.__visibilityRatio === 0) {
-                this.hideChart();
-            }
-
-            this.__visibilityRatioOld = this.__visibilityRatio;
-        }
-    },
-
-    handler: function (entries, observer) {
-        entries.forEach(function (entry) {
-            let state = NETDATA.chartState(entry.target);
-
-            let idx;
-            if (entry.intersectionRatio > 0) {
-                idx = NETDATA.intersectionObserver.visible_targets.indexOf(state);
-                if (idx === -1) {
-                    if (NETDATA.scrollUp) {
-                        NETDATA.intersectionObserver.visible_targets.push(state);
-                    } else {
-                        NETDATA.intersectionObserver.visible_targets.unshift(state);
-                    }
-                }
-                else if (state.__visibilityRatio === 0) {
-                    state.log("was not visible until now, but was already in visible_targets");
-                }
-            } else {
-                idx = NETDATA.intersectionObserver.visible_targets.indexOf(state);
-                if (idx !== -1) {
-                    NETDATA.intersectionObserver.visible_targets.splice(idx, 1);
-                } else if (state.__visibilityRatio > 0) {
-                    state.log("was visible, but not found in visible_targets");
-                }
-            }
-
-            state.__visibilityRatio = entry.intersectionRatio;
-
-            if (!NETDATA.options.current.async_on_scroll) {
-                if (window.requestIdleCallback) {
-                    window.requestIdleCallback(function () {
-                        NETDATA.intersectionObserver.switchChartVisibility.call(state);
-                    }, {timeout: 100});
-                } else {
-                    NETDATA.intersectionObserver.switchChartVisibility.call(state);
-                }
-            }
-        });
-    },
-
-    observe: function (state) {
-        if (this.enabled()) {
-            state.__visibilityRatioOld = 0;
-            state.__visibilityRatio = 0;
-            this.observer.observe(state.element);
-
-            state.isVisible = function () {
-                if (!NETDATA.options.current.update_only_visible) {
-                    return true;
-                }
-
-                NETDATA.intersectionObserver.switchChartVisibility.call(this);
-
-                return this.__visibilityRatio > 0;
-            }
-        }
-    },
-
-    init: function () {
-        if (typeof netdataIntersectionObserver === 'undefined' || netdataIntersectionObserver) {
-            try {
-                this.observer = new IntersectionObserver(this.handler, this.options);
-            } catch (e) {
-                console.log("IntersectionObserver is not supported on this browser");
-                this.observer = null;
-            }
-        }
-        //else {
-        //    console.log("IntersectionObserver is disabled");
-        //}
-    }
-};
-NETDATA.intersectionObserver.init();
-
-// ----------------------------------------------------------------------------------------------------------------
-// Our state object, where all per-chart values are stored
-
-let chartState = function (element) {
-    this.element = element;
-
-    // IMPORTANT:
-    // all private functions should use 'that', instead of 'this'
-    // Alternatively, you can use arrow functions (related issue #4514)
-    let that = this;
-
-    // ============================================================================================================
-    // ERROR HANDLING
-
-    /* error() - private
-     * show an error instead of the chart
-     */
-    let error = (msg) => {
-        let ret = true;
-
-        if (typeof netdataErrorCallback === 'function') {
-            ret = netdataErrorCallback('chart', this.id, msg);
-        }
-
-        if (ret) {
-            this.element.innerHTML = this.id + ': ' + msg;
-            this.enabled = false;
-            this.current = this.pan;
-        }
-    };
-
-    // console logging
-    this.log = function (msg) {
-        console.log(this.id + ' (' + this.library_name + ' ' + this.uuid + '): ' + msg);
-    };
-
-    this.debugLog = function (msg) {
-        if (this.debug) {
-            this.log(msg);
-        }
-    };
-
-    // ============================================================================================================
-    // EARLY INITIALIZATION
-
-    // These are variables that should exist even if the chart is never to be rendered.
-    // Be careful what you add here - there may be thousands of charts on the page.
-
-    // GUID - a unique identifier for the chart
-    this.uuid = NETDATA.guid();
-
-    // string - the name of chart
-    this.id = NETDATA.dataAttribute(this.element, 'netdata', undefined);
-    if (typeof this.id === 'undefined') {
-        error("netdata elements need data-netdata");
-        return;
-    }
-
-    // string - the key for localStorage settings
-    this.settings_id = NETDATA.dataAttribute(this.element, 'id', null);
-
-    // the user given dimensions of the element
-    this.width = NETDATA.dataAttribute(this.element, 'width', NETDATA.chartDefaults.width);
-    this.height = NETDATA.dataAttribute(this.element, 'height', NETDATA.chartDefaults.height);
-    this.height_original = this.height;
-
-    if (this.settings_id !== null) {
-        this.height = NETDATA.localStorageGet('chart_heights.' + this.settings_id, this.height, function (height) {
-            // this is the callback that will be called
-            // if and when the user resets all localStorage variables
-            // to their defaults
-
-            resizeChartToHeight(height);
-        });
-    }
-
-    // the chart library requested by the user
-    this.library_name = NETDATA.dataAttribute(this.element, 'chart-library', NETDATA.chartDefaults.library);
-
-    // check the requested library is available
-    // we don't initialize it here - it will be initialized when
-    // this chart will be first used
-    if (typeof NETDATA.chartLibraries[this.library_name] === 'undefined') {
-        NETDATA.error(402, this.library_name);
-        error('chart library "' + this.library_name + '" is not found');
-        this.enabled = false;
-    } else if (!NETDATA.chartLibraries[this.library_name].enabled) {
-        NETDATA.error(403, this.library_name);
-        error('chart library "' + this.library_name + '" is not enabled');
-        this.enabled = false;
-    } else {
-        this.library = NETDATA.chartLibraries[this.library_name];
-    }
-
-    this.auto = {
-        name: 'auto',
-        autorefresh: true,
-        force_update_at: 0, // the timestamp to force the update at
-        force_before_ms: null,
-        force_after_ms: null
-    };
-    this.pan = {
-        name: 'pan',
-        autorefresh: false,
-        force_update_at: 0, // the timestamp to force the update at
-        force_before_ms: null,
-        force_after_ms: null
-    };
-    this.zoom = {
-        name: 'zoom',
-        autorefresh: false,
-        force_update_at: 0, // the timestamp to force the update at
-        force_before_ms: null,
-        force_after_ms: null
-    };
-
-    // this is a pointer to one of the sub-classes below
-    // auto, pan, zoom
-    this.current = this.auto;
-
-    this.running = false;                       // boolean - true when the chart is being refreshed now
-    this.enabled = true;                        // boolean - is the chart enabled for refresh?
-
-    this.force_update_every = null;             // number - overwrite the visualization update frequency of the chart
-
-    this.tmp = {};
-
-    this.foreignElementBefore = null;
-    this.foreignElementAfter = null;
-    this.foreignElementDuration = null;
-    this.foreignElementUpdateEvery = null;
-    this.foreignElementSelection = null;
-
-    // ============================================================================================================
-    // PRIVATE FUNCTIONS
-
-    // reset the runtime status variables to their defaults
-    const runtimeInit = () => {
-        this.paused = false;                        // boolean - is the chart paused for any reason?
-        this.selected = false;                      // boolean - is the chart shown a selection?
-
-        this.chart_created = false;                 // boolean - is the library.create() been called?
-        this.dom_created = false;                   // boolean - is the chart DOM been created?
-        this.fetching_data = false;                 // boolean - true while we fetch data via ajax
-
-        this.updates_counter = 0;                   // numeric - the number of refreshes made so far
-        this.updates_since_last_unhide = 0;         // numeric - the number of refreshes made since the last time the chart was unhidden
-        this.updates_since_last_creation = 0;       // numeric - the number of refreshes made since the last time the chart was created
-
-        this.tm = {
-            last_initialized: 0,                    // milliseconds - the timestamp it was last initialized
-            last_dom_created: 0,                    // milliseconds - the timestamp its DOM was last created
-            last_mode_switch: 0,                    // milliseconds - the timestamp it switched modes
-
-            last_info_downloaded: 0,                // milliseconds - the timestamp we downloaded the chart
-            last_updated: 0,                        // the timestamp the chart last updated with data
-            pan_and_zoom_seq: 0,                    // the sequence number of the global synchronization
-                                                    // between chart.
-                                                    // Used with NETDATA.globalPanAndZoom.seq
-            last_visible_check: 0,                  // the time we last checked if it is visible
-            last_resized: 0,                        // the time the chart was resized
-            last_hidden: 0,                         // the time the chart was hidden
-            last_unhidden: 0,                       // the time the chart was unhidden
-            last_autorefreshed: 0                   // the time the chart was last refreshed
-        };
-
-        this.data = null;                           // the last data as downloaded from the netdata server
-        this.data_url = 'invalid://';               // string - the last url used to update the chart
-        this.data_points = 0;                       // number - the number of points returned from netdata
-        this.data_after = 0;                        // milliseconds - the first timestamp of the data
-        this.data_before = 0;                       // milliseconds - the last timestamp of the data
-        this.data_update_every = 0;                 // milliseconds - the frequency to update the data
-
-        this.tmp = {};                              // members that can be destroyed to save memory
-    };
-
-    // initialize all the variables that are required for the chart to be rendered
-    const lateInitialization = () => {
-        if (typeof this.host !== 'undefined') {
-            return;
-        }
-
-        // string - the netdata server URL, without any path
-        this.host = NETDATA.dataAttribute(this.element, 'host', NETDATA.serverDefault);
-
-        // make sure the host does not end with /
-        // all netdata API requests use absolute paths
-        while (this.host.slice(-1) === '/') {
-            this.host = this.host.substring(0, this.host.length - 1);
-        }
-
-        // string - the grouping method requested by the user
-        this.method = NETDATA.dataAttribute(this.element, 'method', NETDATA.chartDefaults.method);
-        this.gtime = NETDATA.dataAttribute(this.element, 'gtime', 0);
-
-        // the time-range requested by the user
-        this.after = NETDATA.dataAttribute(this.element, 'after', NETDATA.chartDefaults.after);
-        this.before = NETDATA.dataAttribute(this.element, 'before', NETDATA.chartDefaults.before);
-
-        // the pixels per point requested by the user
-        this.pixels_per_point = NETDATA.dataAttribute(this.element, 'pixels-per-point', 1);
-        this.points = NETDATA.dataAttribute(this.element, 'points', null);
-
-        // the forced update_every
-        this.force_update_every = NETDATA.dataAttribute(this.element, 'update-every', null);
-        if (typeof this.force_update_every !== 'number' || this.force_update_every <= 1) {
-            if (this.force_update_every !== null) {
-                this.log('ignoring invalid value of property data-update-every');
-            }
-
-            this.force_update_every = null;
-        } else {
-            this.force_update_every *= 1000;
-        }
-
-        // the dimensions requested by the user
-        this.dimensions = NETDATA.encodeURIComponent(NETDATA.dataAttribute(this.element, 'dimensions', null));
-
-        this.title = NETDATA.dataAttribute(this.element, 'title', null);    // the title of the chart
-        this.units = NETDATA.dataAttribute(this.element, 'units', null);    // the units of the chart dimensions
-        this.units_desired = NETDATA.dataAttribute(this.element, 'desired-units', NETDATA.options.current.units); // the units of the chart dimensions
-        this.units_current = this.units;
-        this.units_common = NETDATA.dataAttribute(this.element, 'common-units', null);
-
-        // additional options to pass to netdata
-        this.append_options = NETDATA.encodeURIComponent(NETDATA.dataAttribute(this.element, 'append-options', null));
-
-        // override options to pass to netdata
-        this.override_options = NETDATA.encodeURIComponent(NETDATA.dataAttribute(this.element, 'override-options', null));
-
-        this.debug = NETDATA.dataAttributeBoolean(this.element, 'debug', false);
-
-        this.value_decimal_detail = -1;
-        let d = NETDATA.dataAttribute(this.element, 'decimal-digits', -1);
-        if (typeof d === 'number') {
-            this.value_decimal_detail = d;
-        } else if (typeof d !== 'undefined') {
-            this.log('ignoring decimal-digits value: ' + d.toString());
-        }
-
-        // if we need to report the rendering speed
-        // find the element that needs to be updated
-        let refresh_dt_element_name = NETDATA.dataAttribute(this.element, 'dt-element-name', null); // string - the element to print refresh_dt_ms
-
-        if (refresh_dt_element_name !== null) {
-            this.refresh_dt_element = document.getElementById(refresh_dt_element_name) || null;
-        }
-        else {
-            this.refresh_dt_element = null;
-        }
-
-        this.dimensions_visibility = new dimensionsVisibility(that);
-
-        this.netdata_first = 0;                     // milliseconds - the first timestamp in netdata
-        this.netdata_last = 0;                      // milliseconds - the last timestamp in netdata
-        this.requested_after = null;                // milliseconds - the timestamp of the request after param
-        this.requested_before = null;               // milliseconds - the timestamp of the request before param
-        this.requested_padding = null;
-        this.view_after = 0;
-        this.view_before = 0;
-
-        this.refresh_dt_ms = 0;                     // milliseconds - the time the last refresh took
-
-        // how many retries we have made to load chart data from the server
-        this.retries_on_data_failures = 0;
-
-        // color management
-        this.colors = null;
-        this.colors_assigned = null;
-        this.colors_available = null;
-        this.colors_custom = null;
-
-        this.element_message = null; // the element already created by the user
-        this.element_chart = null; // the element with the chart
-        this.element_legend = null; // the element with the legend of the chart (if created by us)
-        this.element_legend_childs = {
-            content: null,
-            hidden: null,
-            title_date: null,
-            title_time: null,
-            title_units: null,
-            perfect_scroller: null, // the container to apply perfect scroller to
-            series: null
-        };
-
-        this.chart_url = null;                      // string - the url to download chart info
-        this.chart = null;                          // object - the chart as downloaded from the server
-
-        const getForeignElementById = (opt) => {
-            let id = NETDATA.dataAttribute(this.element, opt, null);
-            if (id === null) {
-                //this.log('option "' + opt + '" is undefined');
-                return null;
-            }
-
-            let el = document.getElementById(id);
-            if (typeof el === 'undefined') {
-                this.log('cannot find an element with name "' + id.toString() + '"');
-                return null;
-            }
-
-            return el;
-        };
-
-        this.foreignElementBefore = getForeignElementById('show-before-at');
-        this.foreignElementAfter = getForeignElementById('show-after-at');
-        this.foreignElementDuration = getForeignElementById('show-duration-at');
-        this.foreignElementUpdateEvery = getForeignElementById('show-update-every-at');
-        this.foreignElementSelection = getForeignElementById('show-selection-at');
-    };
-
-    const destroyDOM = () => {
-        if (!this.enabled) {
-            return;
-        }
-
-        if (this.debug) {
-            this.log('destroyDOM()');
-        }
-
-        // this.element.className = 'netdata-message icon';
-        // this.element.innerHTML = '<i class="fas fa-sync"></i> netdata';
-        this.element.innerHTML = '';
-        this.element_message = null;
-        this.element_legend = null;
-        this.element_chart = null;
-        this.element_legend_childs.series = null;
-
-        this.chart_created = false;
-        this.dom_created = false;
-
-        this.tm.last_resized = 0;
-        this.tm.last_dom_created = 0;
-    };
-
-    const maxMessageFontSize = () => {
-        let screenHeight = screen.height;
-        let el = this.element;
-
-        // normally we want a font size, as tall as the element
-        let h = el.clientHeight;
-
-        // but give it some air, 20% let's say, or 5 pixels min
-        let lost = Math.max(h * 0.2, 5);
-        h -= lost;
-
-        // center the text, vertically
-        let paddingTop = (lost - 5) / 2;
-
-        // but check the width too
-        // it should fit 10 characters in it
-        let w = el.clientWidth / 10;
-        if (h > w) {
-            paddingTop += (h - w) / 2;
-            h = w;
-        }
-
-        // and don't make it too huge
-        // 5% of the screen size is good
-        if (h > screenHeight / 20) {
-            paddingTop += (h - (screenHeight / 20)) / 2;
-            h = screenHeight / 20;
-        }
-
-        // set it
-        this.element_message.style.fontSize = h.toString() + 'px';
-        this.element_message.style.paddingTop = paddingTop.toString() + 'px';
-    };
-
-    const showMessageIcon = (icon) => {
-        this.element_message.innerHTML = icon;
-        maxMessageFontSize();
-        $(this.element_message).removeClass('hidden');
-        this.tmp.___messageHidden___ = undefined;
-    };
-
-    const showLoading = () => {
-        if (!this.chart_created) {
-            showMessageIcon(NETDATA.icons.loading + ' netdata');
-            return true;
-        }
-        return false;
-    };
-
-    let createDOM = () => {
-        if (!this.enabled) {
-            return;
-        }
-        lateInitialization();
-
-        destroyDOM();
-
-        if (this.debug) {
-            this.log('createDOM()');
-        }
-
-        this.element_message = document.createElement('div');
-        this.element_message.className = 'netdata-message icon hidden';
-        this.element.appendChild(this.element_message);
-
-        this.dom_created = true;
-        this.chart_created = false;
-
-        this.tm.last_dom_created = this.tm.last_resized = Date.now();
-
-        showLoading();
-    };
-
-    const initDOM = () => {
-        this.element.className = this.library.container_class(that);
-
-        if (typeof(this.width) === 'string') {
-            this.element.style.width = this.width;
-        } else if (typeof(this.width) === 'number') {
-            this.element.style.width = this.width.toString() + 'px';
-        }
-
-        if (typeof(this.library.aspect_ratio) === 'undefined') {
-            if (typeof(this.height) === 'string') {
-                this.element.style.height = this.height;
-            } else if (typeof(this.height) === 'number') {
-                this.element.style.height = this.height.toString() + 'px';
-            }
-        }
-
-        if (NETDATA.chartDefaults.min_width !== null) {
-            this.element.style.min_width = NETDATA.chartDefaults.min_width;
-        }
-    };
-
-    const invisibleSearchableText = () => {
-        return '<span style="position:absolute; opacity: 0; width: 0px;">' + this.id + '</span>';
-    };
-
-    /* init() private
-     * initialize state variables
-     * destroy all (possibly) created state elements
-     * create the basic DOM for a chart
-     */
-    const init = (opt) => {
-        if (!this.enabled) {
-            return;
-        }
-
-        runtimeInit();
-        this.element.innerHTML = invisibleSearchableText();
-
-        this.tm.last_initialized = Date.now();
-        this.setMode('auto');
-
-        if (opt !== 'fast') {
-            if (this.isVisible(true) || opt === 'force') {
-                createDOM();
-            }
-        }
-    };
-
-    const hideMessage = () => {
-        if (typeof this.tmp.___messageHidden___ === 'undefined') {
-            this.tmp.___messageHidden___ = true;
-            $(this.element_message).addClass('hidden');
-        }
-    };
-
-    const showRendering = () => {
-        let icon;
-        if (this.chart !== null) {
-            if (this.chart.chart_type === 'line') {
-                icon = NETDATA.icons.lineChart;
-            } else {
-                icon = NETDATA.icons.areaChart;
-            }
-        }
-        else {
-            icon = NETDATA.icons.noChart;
-        }
-
-        showMessageIcon(icon + ' netdata' + invisibleSearchableText());
-    };
-
-    const isHidden = () => {
-        return (typeof this.tmp.___chartIsHidden___ !== 'undefined');
-    };
-
-    // hide the chart, when it is not visible - called from isVisible()
-    this.hideChart = function () {
-        // hide it, if it is not already hidden
-        if (isHidden()) {
-            return;
-        }
-
-        if (this.chart_created) {
-            if (NETDATA.options.current.show_help) {
-                if (this.element_legend_childs.toolbox !== null) {
-                    if (this.debug) {
-                        this.log('hideChart(): hidding legend popovers');
-                    }
-
-                    $(this.element_legend_childs.toolbox_left).popover('hide');
-                    $(this.element_legend_childs.toolbox_reset).popover('hide');
-                    $(this.element_legend_childs.toolbox_right).popover('hide');
-                    $(this.element_legend_childs.toolbox_zoomin).popover('hide');
-                    $(this.element_legend_childs.toolbox_zoomout).popover('hide');
-                }
-
-                if (this.element_legend_childs.resize_handler !== null) {
-                    $(this.element_legend_childs.resize_handler).popover('hide');
-                }
-
-                if (this.element_legend_childs.content !== null) {
-                    $(this.element_legend_childs.content).popover('hide');
-                }
-            }
-
-            if (NETDATA.options.current.destroy_on_hide) {
-                if (this.debug) {
-                    this.log('hideChart(): initializing chart');
-                }
-
-                // we should destroy it
-                init('force');
-            } else {
-                if (this.debug) {
-                    this.log('hideChart(): hiding chart');
-                }
-
-                showRendering();
-                this.element_chart.style.display = 'none';
-                this.element.style.willChange = 'auto';
-                if (this.element_legend !== null) {
-                    this.element_legend.style.display = 'none';
-                }
-                if (this.element_legend_childs.toolbox !== null) {
-                    this.element_legend_childs.toolbox.style.display = 'none';
-                }
-                if (this.element_legend_childs.resize_handler !== null) {
-                    this.element_legend_childs.resize_handler.style.display = 'none';
-                }
-
-                this.tm.last_hidden = Date.now();
-
-                // de-allocate data
-                // This works, but I not sure there are no corner cases somewhere
-                // so it is commented - if the user has memory issues he can
-                // set Destroy on Hide for all charts
-                // this.data = null;
-            }
-        }
-
-        this.tmp.___chartIsHidden___ = true;
-    };
-
-    // unhide the chart, when it is visible - called from isVisible()
-    this.unhideChart = function () {
-        if (!isHidden()) {
-            return;
-        }
-
-        this.tmp.___chartIsHidden___ = undefined;
-        this.updates_since_last_unhide = 0;
-
-        if (!this.chart_created) {
-            if (this.debug) {
-                this.log('unhideChart(): initializing chart');
-            }
-
-            // we need to re-initialize it, to show our background
-            // logo in bootstrap tabs, until the chart loads
-            init('force');
-        } else {
-            if (this.debug) {
-                this.log('unhideChart(): unhiding chart');
-            }
-
-            this.element.style.willChange = 'transform';
-            this.tm.last_unhidden = Date.now();
-            this.element_chart.style.display = '';
-            if (this.element_legend !== null) {
-                this.element_legend.style.display = '';
-            }
-            if (this.element_legend_childs.toolbox !== null) {
-                this.element_legend_childs.toolbox.style.display = '';
-            }
-            if (this.element_legend_childs.resize_handler !== null) {
-                this.element_legend_childs.resize_handler.style.display = '';
-            }
-            resizeChart();
-            hideMessage();
-        }
-
-        if (this.__redraw_on_unhide) {
-            if (this.debug) {
-                this.log("redrawing chart on unhide");
-            }
-
-            this.__redraw_on_unhide = undefined;
-            this.redrawChart();
-        }
-    };
-
-    const canBeRendered = (uncached_visibility) => {
-        if (this.debug) {
-            this.log('canBeRendered() called');
-        }
-
-        if (!NETDATA.options.current.update_only_visible) {
-            return true;
-        }
-
-        let ret = (
-            (
-                NETDATA.options.page_is_visible ||
-                NETDATA.options.current.stop_updates_when_focus_is_lost === false ||
-                this.updates_since_last_unhide === 0
-            )
-            && isHidden() === false && this.isVisible(uncached_visibility)
-        );
-
-        if (this.debug) {
-            this.log('canBeRendered(): ' + ret);
-        }
-
-        return ret;
-    };
-
-    // https://github.com/petkaantonov/bluebird/wiki/Optimization-killers
-    const callChartLibraryUpdateSafely = (data) => {
-        let status;
-
-        // we should not do this here
-        // if we prevent rendering the chart then:
-        // 1. globalSelectionSync will be wrong
-        // 2. globalPanAndZoom will be wrong
-        //if (canBeRendered(true) === false)
-        //    return false;
-
-        if (NETDATA.options.fake_chart_rendering) {
-            return true;
-        }
-
-        this.updates_counter++;
-        this.updates_since_last_unhide++;
-        this.updates_since_last_creation++;
-
-        if (NETDATA.options.debug.chart_errors) {
-            status = this.library.update(that, data);
-        } else {
-            try {
-                status = this.library.update(that, data);
-            } catch (err) {
-                status = false;
-            }
-        }
-
-        if (!status) {
-            error('chart failed to be updated as ' + this.library_name);
-            return false;
-        }
-
-        return true;
-    };
-
-    // https://github.com/petkaantonov/bluebird/wiki/Optimization-killers
-    const callChartLibraryCreateSafely = (data) => {
-        let status;
-
-        // we should not do this here
-        // if we prevent rendering the chart then:
-        // 1. globalSelectionSync will be wrong
-        // 2. globalPanAndZoom will be wrong
-        //if (canBeRendered(true) === false)
-        //    return false;
-
-        if (NETDATA.options.fake_chart_rendering) {
-            return true;
-        }
-
-        this.updates_counter++;
-        this.updates_since_last_unhide++;
-        this.updates_since_last_creation++;
-
-        if (NETDATA.options.debug.chart_errors) {
-            status = this.library.create(that, data);
-        } else {
-            try {
-                status = this.library.create(that, data);
-            } catch (err) {
-                status = false;
-            }
-        }
-
-        if (!status) {
-            error('chart failed to be created as ' + this.library_name);
-            return false;
-        }
-
-        this.chart_created = true;
-        this.updates_since_last_creation = 0;
-        return true;
-    };
-
-    // ----------------------------------------------------------------------------------------------------------------
-    // Chart Resize
-
-    // resizeChart() - private
-    // to be called just before the chart library to make sure that
-    // a properly sized dom is available
-    const resizeChart = () => {
-        if (this.tm.last_resized < NETDATA.options.last_page_resize) {
-            if (!this.chart_created) {
-                return;
-            }
-
-            if (this.needsRecreation()) {
-                if (this.debug) {
-                    this.log('resizeChart(): initializing chart');
-                }
-
-                init('force');
-            } else if (typeof this.library.resize === 'function') {
-                if (this.debug) {
-                    this.log('resizeChart(): resizing chart');
-                }
-
-                this.library.resize(that);
-
-                if (this.element_legend_childs.perfect_scroller !== null) {
-                    Ps.update(this.element_legend_childs.perfect_scroller);
-                }
-
-                maxMessageFontSize();
-            }
-
-            this.tm.last_resized = Date.now();
-        }
-    };
-
-    // this is the actual chart resize algorithm
-    // it will:
-    // - resize the entire container
-    // - update the internal states
-    // - resize the chart as the div changes height
-    // - update the scrollbar of the legend
-    const resizeChartToHeight = (h) => {
-        // console.log(h);
-        this.element.style.height = h;
-
-        if (this.settings_id !== null) {
-            NETDATA.localStorageSet('chart_heights.' + this.settings_id, h);
-        }
-
-        let now = Date.now();
-        NETDATA.options.last_page_scroll = now;
-        NETDATA.options.auto_refresher_stop_until = now + NETDATA.options.current.stop_updates_while_resizing;
-
-        // force a resize
-        this.tm.last_resized = 0;
-        resizeChart();
-    };
-
-    this.resizeForPrint = function () {
-        if (typeof this.element_legend_childs !== 'undefined' && this.element_legend_childs.perfect_scroller !== null) {
-            let current = this.element.clientHeight;
-            let optimal = current
-                + this.element_legend_childs.perfect_scroller.scrollHeight
-                - this.element_legend_childs.perfect_scroller.clientHeight;
-
-            if (optimal > current) {
-                // this.log('resized');
-                this.element.style.height = optimal + 'px';
-                this.library.resize(this);
-            }
-        }
-    };
-
-    this.resizeHandler = function (e) {
-        e.preventDefault();
-
-        if (typeof this.event_resize === 'undefined'
-            || this.event_resize.chart_original_w === 'undefined'
-            || this.event_resize.chart_original_h === 'undefined') {
-            this.event_resize = {
-                chart_original_w: this.element.clientWidth,
-                chart_original_h: this.element.clientHeight,
-                last: 0
-            };
-        }
-
-        if (e.type === 'touchstart') {
-            this.event_resize.mouse_start_x = e.touches.item(0).pageX;
-            this.event_resize.mouse_start_y = e.touches.item(0).pageY;
-        } else {
-            this.event_resize.mouse_start_x = e.clientX;
-            this.event_resize.mouse_start_y = e.clientY;
-        }
-
-        this.event_resize.chart_start_w = this.element.clientWidth;
-        this.event_resize.chart_start_h = this.element.clientHeight;
-        this.event_resize.chart_last_w = this.element.clientWidth;
-        this.event_resize.chart_last_h = this.element.clientHeight;
-
-        let now = Date.now();
-        if (now - this.event_resize.last <= NETDATA.options.current.double_click_speed && this.element_legend_childs.perfect_scroller !== null) {
-            // double click / double tap event
-
-            // console.dir(this.element_legend_childs.content);
-            // console.dir(this.element_legend_childs.perfect_scroller);
-
-            // the optimal height of the chart
-            // showing the entire legend
-            let optimal = this.event_resize.chart_last_h
-                + this.element_legend_childs.perfect_scroller.scrollHeight
-                - this.element_legend_childs.perfect_scroller.clientHeight;
-
-            // if we are not optimal, be optimal
-            if (this.event_resize.chart_last_h !== optimal) {
-                // this.log('resize to optimal, current = ' + this.event_resize.chart_last_h.toString() + 'px, original = ' + this.event_resize.chart_original_h.toString() + 'px, optimal = ' + optimal.toString() + 'px, internal = ' + this.height_original.toString());
-                resizeChartToHeight(optimal.toString() + 'px');
-            }
-
-            // else if the current height is not the original/saved height
-            // reset to the original/saved height
-            else if (this.event_resize.chart_last_h !== this.event_resize.chart_original_h) {
-                // this.log('resize to original, current = ' + this.event_resize.chart_last_h.toString() + 'px, original = ' + this.event_resize.chart_original_h.toString() + 'px, optimal = ' + optimal.toString() + 'px, internal = ' + this.height_original.toString());
-                resizeChartToHeight(this.event_resize.chart_original_h.toString() + 'px');
-            }
-
-            // else if the current height is not the internal default height
-            // reset to the internal default height
-            else if ((this.event_resize.chart_last_h.toString() + 'px') !== this.height_original) {
-                // this.log('resize to internal default, current = ' + this.event_resize.chart_last_h.toString() + 'px, original = ' + this.event_resize.chart_original_h.toString() + 'px, optimal = ' + optimal.toString() + 'px, internal = ' + this.height_original.toString());
-                resizeChartToHeight(this.height_original.toString());
-            }
-
-            // else if the current height is not the firstchild's clientheight
-            // resize to it
-            else if (typeof this.element_legend_childs.perfect_scroller.firstChild !== 'undefined') {
-                let parent_rect = this.element.getBoundingClientRect();
-                let content_rect = this.element_legend_childs.perfect_scroller.firstElementChild.getBoundingClientRect();
-                let wanted = content_rect.top - parent_rect.top + this.element_legend_childs.perfect_scroller.firstChild.clientHeight + 18; // 15 = toolbox + 3 space
-
-                // console.log(parent_rect);
-                // console.log(content_rect);
-                // console.log(wanted);
-
-                // this.log('resize to firstChild, current = ' + this.event_resize.chart_last_h.toString() + 'px, original = ' + this.event_resize.chart_original_h.toString() + 'px, optimal = ' + optimal.toString() + 'px, internal = ' + this.height_original.toString() + 'px, firstChild = ' + wanted.toString() + 'px' );
-                if (this.event_resize.chart_last_h !== wanted) {
-                    resizeChartToHeight(wanted.toString() + 'px');
-                }
-            }
-        } else {
-            this.event_resize.last = now;
-
-            // process movement event
-            document.onmousemove =
-                document.ontouchmove =
-                    this.element_legend_childs.resize_handler.onmousemove =
-                        this.element_legend_childs.resize_handler.ontouchmove =
-                            function (e) {
-                                let y = null;
-
-                                switch (e.type) {
-                                    case 'mousemove':
-                                        y = e.clientY;
-                                        break;
-                                    case 'touchmove':
-                                        y = e.touches.item(e.touches - 1).pageY;
-                                        break;
-                                }
-
-                                if (y !== null) {
-                                    let newH = that.event_resize.chart_start_h + y - that.event_resize.mouse_start_y;
-
-                                    if (newH >= 70 && newH !== that.event_resize.chart_last_h) {
-                                        resizeChartToHeight(newH.toString() + 'px');
-                                        that.event_resize.chart_last_h = newH;
-                                    }
-                                }
-                            };
-
-            // process end event
-            document.onmouseup =
-                document.ontouchend =
-                    this.element_legend_childs.resize_handler.onmouseup =
-                        this.element_legend_childs.resize_handler.ontouchend =
-                            function (e) {
-                                void(e);
-
-                                // remove all the hooks
-                                document.onmouseup =
-                                    document.onmousemove =
-                                        document.ontouchmove =
-                                            document.ontouchend =
-                                                that.element_legend_childs.resize_handler.onmousemove =
-                                                    that.element_legend_childs.resize_handler.ontouchmove =
-                                                        that.element_legend_childs.resize_handler.onmouseout =
-                                                            that.element_legend_childs.resize_handler.onmouseup =
-                                                                that.element_legend_childs.resize_handler.ontouchend =
-                                                                    null;
-
-                                // allow auto-refreshes
-                                NETDATA.options.auto_refresher_stop_until = 0;
-                            };
-        }
-    };
-
-    const noDataToShow = () => {
-        showMessageIcon(NETDATA.icons.noData + ' empty');
-        this.legendUpdateDOM();
-        this.tm.last_autorefreshed = Date.now();
-        // this.data_update_every = 30 * 1000;
-        //this.element_chart.style.display = 'none';
-        //if (this.element_legend !== null) this.element_legend.style.display = 'none';
-        //this.tmp.___chartIsHidden___ = true;
-    };
-
-    // ============================================================================================================
-    // PUBLIC FUNCTIONS
-
-    this.error = function (msg) {
-        error(msg);
-    };
-
-    this.setMode = function (m) {
-        if (this.current !== null && this.current.name === m) {
-            return;
-        }
-
-        if (m === 'auto') {
-            this.current = this.auto;
-        } else if (m === 'pan') {
-            this.current = this.pan;
-        } else if (m === 'zoom') {
-            this.current = this.zoom;
-        } else {
-            this.current = this.auto;
-        }
-
-        this.current.force_update_at = 0;
-        this.current.force_before_ms = null;
-        this.current.force_after_ms = null;
-
-        this.tm.last_mode_switch = Date.now();
-    };
-
-    // ----------------------------------------------------------------------------------------------------------------
-    // global selection sync for slaves
-
-    // can the chart participate to the global selection sync as a slave?
-    this.globalSelectionSyncIsEligible = function () {
-        return (
-            this.enabled &&
-            this.library !== null &&
-            typeof this.library.setSelection === 'function' &&
-            this.isVisible() &&
-            this.chart_created
-        );
-    };
-
-    this.setSelection = function (t) {
-        if (typeof this.library.setSelection === 'function') {
-            // this.selected = this.library.setSelection(this, t) === true;
-            this.selected = this.library.setSelection(this, t);
-        } else {
-            this.selected = true;
-        }
-
-        if (this.selected && this.debug) {
-            this.log('selection set to ' + t.toString());
-        }
-
-        if (this.foreignElementSelection !== null) {
-            this.foreignElementSelection.innerText = NETDATA.dateTime.localeDateString(t) + ' ' + NETDATA.dateTime.localeTimeString(t);
-        }
-
-        return this.selected;
-    };
-
-    this.clearSelection = function () {
-        if (this.selected) {
-            if (typeof this.library.clearSelection === 'function') {
-                this.selected = (this.library.clearSelection(this) !== true);
-            } else {
-                this.selected = false;
-            }
-
-            if (this.selected === false && this.debug) {
-                this.log('selection cleared');
-            }
-
-            if (this.foreignElementSelection !== null) {
-                this.foreignElementSelection.innerText = '';
-            }
-
-            this.legendReset();
-        }
-
-        return this.selected;
-    };
-
-    // ----------------------------------------------------------------------------------------------------------------
-
-    // find if a timestamp (ms) is shown in the current chart
-    this.timeIsVisible = function (t) {
-        return (t >= this.data_after && t <= this.data_before);
-    };
-
-    this.calculateRowForTime = function (t) {
-        if (!this.timeIsVisible(t)) {
-            return -1;
-        }
-        return Math.floor((t - this.data_after) / this.data_update_every);
-    };
-
-    // ----------------------------------------------------------------------------------------------------------------
-
-    this.pauseChart = function () {
-        if (!this.paused) {
-            if (this.debug) {
-                this.log('pauseChart()');
-            }
-
-            this.paused = true;
-        }
-    };
-
-    this.unpauseChart = function () {
-        if (this.paused) {
-            if (this.debug) {
-                this.log('unpauseChart()');
-            }
-
-            this.paused = false;
-        }
-    };
-
-    this.resetChart = function (dontClearMaster, dontUpdate) {
-        if (this.debug) {
-            this.log('resetChart(' + dontClearMaster + ', ' + dontUpdate + ') called');
-        }
-
-        if (typeof dontClearMaster === 'undefined') {
-            dontClearMaster = false;
-        }
-
-        if (typeof dontUpdate === 'undefined') {
-            dontUpdate = false;
-        }
-
-        if (dontClearMaster !== true && NETDATA.globalPanAndZoom.isMaster(this)) {
-            if (this.debug) {
-                this.log('resetChart() diverting to clearMaster().');
-            }
-            // this will call us back with master === true
-            NETDATA.globalPanAndZoom.clearMaster();
-            return;
-        }
-
-        this.clearSelection();
-
-        this.tm.pan_and_zoom_seq = 0;
-
-        this.setMode('auto');
-        this.current.force_update_at = 0;
-        this.current.force_before_ms = null;
-        this.current.force_after_ms = null;
-        this.tm.last_autorefreshed = 0;
-        this.paused = false;
-        this.selected = false;
-        this.enabled = true;
-        // this.debug = false;
-
-        // do not update the chart here
-        // or the chart will flip-flop when it is the master
-        // of a selection sync and another chart becomes
-        // the new master
-
-        if (dontUpdate !== true && this.isVisible()) {
-            this.updateChart();
-        }
-    };
-
-    this.updateChartPanOrZoom = function (after, before, callback) {
-        let logme = 'updateChartPanOrZoom(' + after + ', ' + before + '): ';
-        let ret = true;
-
-        NETDATA.globalPanAndZoom.delay();
-        NETDATA.globalSelectionSync.delay();
-
-        if (this.debug) {
-            this.log(logme);
-        }
-
-        if (before < after) {
-            if (this.debug) {
-                this.log(logme + 'flipped parameters, rejecting it.');
-            }
-            return false;
-        }
-
-        if (typeof this.fixed_min_duration === 'undefined') {
-            this.fixed_min_duration = Math.round((this.chartWidth() / 30) * this.chart.update_every * 1000);
-        }
-
-        let min_duration = this.fixed_min_duration;
-        let current_duration = Math.round(this.view_before - this.view_after);
-
-        // round the numbers
-        after = Math.round(after);
-        before = Math.round(before);
-
-        // align them to update_every
-        // stretching them further away
-        after -= after % this.data_update_every;
-        before += this.data_update_every - (before % this.data_update_every);
-
-        // the final wanted duration
-        let wanted_duration = before - after;
-
-        // to allow panning, accept just a point below our minimum
-        if ((current_duration - this.data_update_every) < min_duration) {
-            min_duration = current_duration - this.data_update_every;
-        }
-
-        // we do it, but we adjust to minimum size and return false
-        // when the wanted size is below the current and the minimum
-        // and we zoom
-        if (wanted_duration < current_duration && wanted_duration < min_duration) {
-            if (this.debug) {
-                this.log(logme + 'too small: min_duration: ' + (min_duration / 1000).toString() + ', wanted: ' + (wanted_duration / 1000).toString());
-            }
-
-            min_duration = this.fixed_min_duration;
-
-            let dt = (min_duration - wanted_duration) / 2;
-            before += dt;
-            after -= dt;
-            wanted_duration = before - after;
-            ret = false;
-        }
-
-        let tolerance = this.data_update_every * 2;
-        let movement = Math.abs(before - this.view_before);
-
-        if (Math.abs(current_duration - wanted_duration) <= tolerance && movement <= tolerance && ret) {
-            if (this.debug) {
-                this.log(logme + 'REJECTING UPDATE: current/min duration: ' + (current_duration / 1000).toString() + '/' + (this.fixed_min_duration / 1000).toString() + ', wanted duration: ' + (wanted_duration / 1000).toString() + ', duration diff: ' + (Math.round(Math.abs(current_duration - wanted_duration) / 1000)).toString() + ', movement: ' + (movement / 1000).toString() + ', tolerance: ' + (tolerance / 1000).toString() + ', returning: ' + false);
-            }
-            return false;
-        }
-
-        if (this.current.name === 'auto') {
-            this.log(logme + 'caller called me with mode: ' + this.current.name);
-            this.setMode('pan');
-        }
-
-        if (this.debug) {
-            this.log(logme + 'ACCEPTING UPDATE: current/min duration: ' + (current_duration / 1000).toString() + '/' + (this.fixed_min_duration / 1000).toString() + ', wanted duration: ' + (wanted_duration / 1000).toString() + ', duration diff: ' + (Math.round(Math.abs(current_duration - wanted_duration) / 1000)).toString() + ', movement: ' + (movement / 1000).toString() + ', tolerance: ' + (tolerance / 1000).toString() + ', returning: ' + ret);
-        }
-
-        this.current.force_update_at = Date.now() + NETDATA.options.current.pan_and_zoom_delay;
-        this.current.force_after_ms = after;
-        this.current.force_before_ms = before;
-        NETDATA.globalPanAndZoom.setMaster(this, after, before);
-
-        if (ret && typeof callback === 'function') {
-            callback();
-        }
-
-        return ret;
-    };
-
-    this.updateChartPanOrZoomAsyncTimeOutId = undefined;
-    this.updateChartPanOrZoomAsync = function (after, before, callback) {
-        NETDATA.globalPanAndZoom.delay();
-        NETDATA.globalSelectionSync.delay();
-
-        if (!NETDATA.globalPanAndZoom.isMaster(this)) {
-            this.pauseChart();
-            NETDATA.globalPanAndZoom.setMaster(this, after, before);
-            // NETDATA.globalSelectionSync.stop();
-            NETDATA.globalSelectionSync.setMaster(this);
-        }
-
-        if (this.updateChartPanOrZoomAsyncTimeOutId) {
-            NETDATA.timeout.clear(this.updateChartPanOrZoomAsyncTimeOutId);
-        }
-
-        NETDATA.timeout.set(function () {
-            that.updateChartPanOrZoomAsyncTimeOutId = undefined;
-            that.updateChartPanOrZoom(after, before, callback);
-        }, 0);
-    };
-
-    let _unitsConversionLastUnits = undefined;
-    let _unitsConversionLastUnitsDesired = undefined;
-    let _unitsConversionLastMin = undefined;
-    let _unitsConversionLastMax = undefined;
-    let _unitsConversion = function (value) {
-        return value;
-    };
-    this.unitsConversionSetup = function (min, max) {
-        if (this.units !== _unitsConversionLastUnits
-            || this.units_desired !== _unitsConversionLastUnitsDesired
-            || min !== _unitsConversionLastMin
-            || max !== _unitsConversionLastMax) {
-
-            _unitsConversionLastUnits = this.units;
-            _unitsConversionLastUnitsDesired = this.units_desired;
-            _unitsConversionLastMin = min;
-            _unitsConversionLastMax = max;
-
-            _unitsConversion = NETDATA.unitsConversion.get(this.uuid, min, max, this.units, this.units_desired, this.units_common, function (units) {
-                // console.log('switching units from ' + that.units.toString() + ' to ' + units.toString());
-                that.units_current = units;
-                that.legendSetUnitsString(that.units_current);
-            });
-        }
-    };
-
-    let _legendFormatValueChartDecimalsLastMin = undefined;
-    let _legendFormatValueChartDecimalsLastMax = undefined;
-    let _legendFormatValueChartDecimals = -1;
-    let _intlNumberFormat = null;
-    this.legendFormatValueDecimalsFromMinMax = function (min, max) {
-        if (min === _legendFormatValueChartDecimalsLastMin && max === _legendFormatValueChartDecimalsLastMax) {
-            return;
-        }
-
-        this.unitsConversionSetup(min, max);
-        if (_unitsConversion !== null) {
-            min = _unitsConversion(min);
-            max = _unitsConversion(max);
-
-            if (typeof min !== 'number' || typeof max !== 'number') {
-                return;
-            }
-        }
-
-        _legendFormatValueChartDecimalsLastMin = min;
-        _legendFormatValueChartDecimalsLastMax = max;
-
-        let old = _legendFormatValueChartDecimals;
-
-        if (this.data !== null && this.data.min === this.data.max)
-        // it is a fixed number, let the visualizer decide based on the value
-        {
-            _legendFormatValueChartDecimals = -1;
-        } else if (this.value_decimal_detail !== -1)
-        // there is an override
-        {
-            _legendFormatValueChartDecimals = this.value_decimal_detail;
-        } else {
-            // ok, let's calculate the proper number of decimal points
-            let delta;
-
-            if (min === max) {
-                delta = Math.abs(min);
-            } else {
-                delta = Math.abs(max - min);
-            }
-
-            if (delta > 1000) {
-                _legendFormatValueChartDecimals = 0;
-            } else if (delta > 10) {
-                _legendFormatValueChartDecimals = 1;
-            } else if (delta > 1) {
-                _legendFormatValueChartDecimals = 2;
-            } else if (delta > 0.1) {
-                _legendFormatValueChartDecimals = 2;
-            } else if (delta > 0.01) {
-                _legendFormatValueChartDecimals = 4;
-            } else if (delta > 0.001) {
-                _legendFormatValueChartDecimals = 5;
-            } else if (delta > 0.0001) {
-                _legendFormatValueChartDecimals = 6;
-            } else {
-                _legendFormatValueChartDecimals = 7;
-            }
-        }
-
-        if (_legendFormatValueChartDecimals !== old) {
-            if (_legendFormatValueChartDecimals < 0) {
-                _intlNumberFormat = null;
-            } else {
-                _intlNumberFormat = NETDATA.fastNumberFormat.get(
-                    _legendFormatValueChartDecimals,
-                    _legendFormatValueChartDecimals
-                );
-            }
-        }
-    };
-
-    this.legendFormatValue = function (value) {
-        if (typeof value !== 'number') {
-            return '-';
-        }
-
-        value = _unitsConversion(value);
-
-        if (typeof value !== 'number') {
-            return value;
-        }
-
-        if (_intlNumberFormat !== null) {
-            return _intlNumberFormat.format(value);
-        }
-
-        let dmin, dmax;
-        if (this.value_decimal_detail !== -1) {
-            dmin = dmax = this.value_decimal_detail;
-        } else {
-            dmin = 0;
-            let abs = (value < 0) ? -value : value;
-            if (abs > 1000) {
-                dmax = 0;
-            } else if (abs > 10) {
-                dmax = 1;
-            } else if (abs > 1) {
-                dmax = 2;
-            } else if (abs > 0.1) {
-                dmax = 2;
-            } else if (abs > 0.01) {
-                dmax = 4;
-            } else if (abs > 0.001) {
-                dmax = 5;
-            } else if (abs > 0.0001) {
-                dmax = 6;
-            } else {
-                dmax = 7;
-            }
-        }
-
-        return NETDATA.fastNumberFormat.get(dmin, dmax).format(value);
-    };
-
-    this.legendSetLabelValue = function (label, value) {
-        let series = this.element_legend_childs.series[label];
-        if (typeof series === 'undefined') {
-            return;
-        }
-        if (series.value === null && series.user === null) {
-            return;
-        }
-
-        /*
-        // this slows down firefox and edge significantly
-        // since it requires to use innerHTML(), instead of innerText()
-
-        // if the value has not changed, skip DOM update
-        //if (series.last === value) return;
-
-        let s, r;
-        if (typeof value === 'number') {
-            let v = Math.abs(value);
-            s = r = this.legendFormatValue(value);
-
-            if (typeof series.last === 'number') {
-                if (v > series.last) s += '<i class="fas fa-angle-up" style="width: 8px; text-align: center; overflow: hidden; vertical-align: middle;"></i>';
-                else if (v < series.last) s += '<i class="fas fa-angle-down" style="width: 8px; text-align: center; overflow: hidden; vertical-align: middle;"></i>';
-                else s += '<i class="fas fa-angle-left" style="width: 8px; text-align: center; overflow: hidden; vertical-align: middle;"></i>';
-            }
-            else s += '<i class="fas fa-angle-right" style="width: 8px; text-align: center; overflow: hidden; vertical-align: middle;"></i>';
-
-            series.last = v;
-        }
-        else {
-            if (value === null)
-                s = r = '';
-            else
-                s = r = value;
-
-            series.last = value;
-        }
-        */
-
-        let s = this.legendFormatValue(value);
-
-        // caching: do not update the update to show the same value again
-        if (s === series.last_shown_value) {
-            return;
-        }
-        series.last_shown_value = s;
-
-        if (series.value !== null) {
-            series.value.innerText = s;
-        }
-        if (series.user !== null) {
-            series.user.innerText = s;
-        }
-    };
-
-    this.legendSetDateString = function (date) {
-        if (this.element_legend_childs.title_date !== null && date !== this.tmp.__last_shown_legend_date) {
-            this.element_legend_childs.title_date.innerText = date;
-            this.tmp.__last_shown_legend_date = date;
-        }
-    };
-
-    this.legendSetTimeString = function (time) {
-        if (this.element_legend_childs.title_time !== null && time !== this.tmp.__last_shown_legend_time) {
-            this.element_legend_childs.title_time.innerText = time;
-            this.tmp.__last_shown_legend_time = time;
-        }
-    };
-
-    this.legendSetUnitsString = function (units) {
-        if (this.element_legend_childs.title_units !== null && units !== this.tmp.__last_shown_legend_units) {
-            this.element_legend_childs.title_units.innerText = units;
-            this.tmp.__last_shown_legend_units = units;
-        }
-    };
-
-    this.legendSetDateLast = {
-        ms: 0,
-        date: undefined,
-        time: undefined
-    };
-
-    this.legendSetDate = function (ms) {
-        if (typeof ms !== 'number') {
-            this.legendShowUndefined();
-            return;
-        }
-
-        if (this.legendSetDateLast.ms !== ms) {
-            let d = new Date(ms);
-            this.legendSetDateLast.ms = ms;
-            this.legendSetDateLast.date = NETDATA.dateTime.localeDateString(d);
-            this.legendSetDateLast.time = NETDATA.dateTime.localeTimeString(d);
-        }
-
-        this.legendSetDateString(this.legendSetDateLast.date);
-        this.legendSetTimeString(this.legendSetDateLast.time);
-        this.legendSetUnitsString(this.units_current)
-    };
-
-    this.legendShowUndefined = function () {
-        this.legendSetDateString(this.legendPluginModuleString(false));
-        this.legendSetTimeString(this.chart.context.toString());
-        // this.legendSetUnitsString(' ');
-
-        if (this.data && this.element_legend_childs.series !== null) {
-            let labels = this.data.dimension_names;
-            let i = labels.length;
-            while (i--) {
-                let label = labels[i];
-
-                if (typeof label === 'undefined' || typeof this.element_legend_childs.series[label] === 'undefined') {
-                    continue;
-                }
-                this.legendSetLabelValue(label, null);
-            }
-        }
-    };
-
-    this.legendShowLatestValues = function () {
-        if (this.chart === null) {
-            return;
-        }
-        if (this.selected) {
-            return;
-        }
-
-        if (this.data === null || this.element_legend_childs.series === null) {
-            this.legendShowUndefined();
-            return;
-        }
-
-        let show_undefined = true;
-        if (Math.abs(this.netdata_last - this.view_before) <= this.data_update_every) {
-            show_undefined = false;
-        }
-
-        if (show_undefined) {
-            this.legendShowUndefined();
-            return;
-        }
-
-        this.legendSetDate(this.view_before);
-
-        let labels = this.data.dimension_names;
-        let i = labels.length;
-        while (i--) {
-            let label = labels[i];
-
-            if (typeof label === 'undefined') {
-                continue;
-            }
-            if (typeof this.element_legend_childs.series[label] === 'undefined') {
-                continue;
-            }
-
-            this.legendSetLabelValue(label, this.data.view_latest_values[i]);
-        }
-    };
-
-    this.legendReset = function () {
-        this.legendShowLatestValues();
-    };
-
-    // this should be called just ONCE per dimension per chart
-    this.__chartDimensionColor = function (label) {
-        let c = NETDATA.commonColors.get(this, label);
-
-        // it is important to maintain a list of colors
-        // for this chart only, since the chart library
-        // uses this to assign colors to dimensions in the same
-        // order the dimension are given to it
-        this.colors.push(c);
-
-        return c;
-    };
-
-    this.chartPrepareColorPalette = function () {
-        NETDATA.commonColors.refill(this);
-    };
-
-    // get the ordered list of chart colors
-    // this includes user defined colors
-    this.chartCustomColors = function () {
-        this.chartPrepareColorPalette();
-
-        let colors;
-        if (this.colors_custom.length) {
-            colors = this.colors_custom;
-        } else {
-            colors = this.colors;
-        }
-
-        if (this.debug) {
-            this.log("chartCustomColors() returns:");
-            this.log(colors);
-        }
-
-        return colors;
-    };
-
-    // get the ordered list of chart ASSIGNED colors
-    // (this returns only the colors that have been
-    //  assigned to dimensions, prepended with any
-    // custom colors defined)
-    this.chartColors = function () {
-        this.chartPrepareColorPalette();
-
-        if (this.debug) {
-            this.log("chartColors() returns:");
-            this.log(this.colors);
-        }
-
-        return this.colors;
-    };
-
-    this.legendPluginModuleString = function (withContext) {
-        let str = ' ';
-        let context = '';
-
-        if (typeof this.chart !== 'undefined') {
-            if (withContext && typeof this.chart.context === 'string') {
-                context = this.chart.context;
-            }
-
-            if (typeof this.chart.plugin === 'string' && this.chart.plugin !== '') {
-                str = this.chart.plugin;
-
-                if (str.endsWith(".plugin")) {
-                    str = str.substring(0, str.length - 7);
-                }
-
-                if (typeof this.chart.module === 'string' && this.chart.module !== '') {
-                    str += ':' + this.chart.module;
-                }
-
-                if (withContext && context !== '') {
-                    str += ', ' + context;
-                }
-            }
-            else if (withContext && context !== '') {
-                str = context;
-            }
-        }
-
-        return str;
-    };
-
-    this.legendResolutionTooltip = function () {
-        if (!this.chart) {
-            return '';
-        }
-
-        let collected = this.chart.update_every;
-        let viewed = (this.data) ? this.data.view_update_every : collected;
-
-        if (collected === viewed) {
-            return "resolution " + NETDATA.seconds4human(collected);
-        }
-
-        return "resolution " + NETDATA.seconds4human(viewed) + ", collected every " + NETDATA.seconds4human(collected);
-    };
-
-    this.legendUpdateDOM = function () {
-        let needed = false, dim, keys, len;
-
-        // check that the legend DOM is up to date for the downloaded dimensions
-        if (typeof this.element_legend_childs.series !== 'object' || this.element_legend_childs.series === null) {
-            // this.log('the legend does not have any series - requesting legend update');
-            needed = true;
-        } else if (this.data === null) {
-            // this.log('the chart does not have any data - requesting legend update');
-            needed = true;
-        } else if (typeof this.element_legend_childs.series.labels_key === 'undefined') {
-            needed = true;
-        } else {
-            let labels = this.data.dimension_names.toString();
-            if (labels !== this.element_legend_childs.series.labels_key) {
-                needed = true;
-
-                if (this.debug) {
-                    this.log('NEW LABELS: "' + labels + '" NOT EQUAL OLD LABELS: "' + this.element_legend_childs.series.labels_key + '"');
-                }
-            }
-        }
-
-        if (!needed) {
-            // make sure colors available
-            this.chartPrepareColorPalette();
-
-            // do we have to update the current values?
-            // we do this, only when the visible chart is current
-            if (Math.abs(this.netdata_last - this.view_before) <= this.data_update_every) {
-                if (this.debug) {
-                    this.log('chart is in latest position... updating values on legend...');
-                }
-
-                //let labels = this.data.dimension_names;
-                //let i = labels.length;
-                //while (i--)
-                //  this.legendSetLabelValue(labels[i], this.data.view_latest_values[i]);
-            }
-            return;
-        }
-
-        if (this.colors === null) {
-            // this is the first time we update the chart
-            // let's assign colors to all dimensions
-            if (this.library.track_colors()) {
-                this.colors = [];
-                keys = Object.keys(this.chart.dimensions);
-                len = keys.length;
-                for (let i = 0; i < len; i++) {
-                    NETDATA.commonColors.get(this, this.chart.dimensions[keys[i]].name);
-                }
-            }
-        }
-
-        // we will re-generate the colors for the chart
-        // based on the dimensions this result has data for
-        this.colors = [];
-
-        if (this.debug) {
-            this.log('updating Legend DOM');
-        }
-
-        // mark all dimensions as invalid
-        this.dimensions_visibility.invalidateAll();
-
-        const genLabel = function (state, parent, dim, name, count) {
-            let color = state.__chartDimensionColor(name);
-
-            let user_element = null;
-            let user_id = NETDATA.dataAttribute(state.element, 'show-value-of-' + name.toLowerCase() + '-at', null);
-            if (user_id === null) {
-                user_id = NETDATA.dataAttribute(state.element, 'show-value-of-' + dim.toLowerCase() + '-at', null);
-            }
-            if (user_id !== null) {
-                user_element = document.getElementById(user_id) || null;
-                if (user_element === null) {
-                    state.log('Cannot find element with id: ' + user_id);
-                }
-            }
-
-            state.element_legend_childs.series[name] = {
-                name: document.createElement('span'),
-                value: document.createElement('span'),
-                user: user_element,
-                last: null,
-                last_shown_value: null
-            };
-
-            let label = state.element_legend_childs.series[name];
-
-            // create the dimension visibility tracking for this label
-            state.dimensions_visibility.dimensionAdd(name, label.name, label.value, color);
-
-            let rgb = NETDATA.colorHex2Rgb(color);
-            label.name.innerHTML = '<table class="netdata-legend-name-table-'
-                + state.chart.chart_type
-                + '" style="background-color: '
-                + 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + NETDATA.options.current['color_fill_opacity_' + state.chart.chart_type] + ') !important'
-                + '"><tr class="netdata-legend-name-tr"><td class="netdata-legend-name-td"></td></tr></table>';
-
-            let text = document.createTextNode(' ' + name);
-            label.name.appendChild(text);
-
-            if (count > 0) {
-                parent.appendChild(document.createElement('br'));
-            }
-
-            parent.appendChild(label.name);
-            parent.appendChild(label.value);
-        };
-
-        let content = document.createElement('div');
-
-        if (this.element_chart === null) {
-            this.element_chart = document.createElement('div');
-            this.element_chart.id = this.library_name + '-' + this.uuid + '-chart';
-            this.element.appendChild(this.element_chart);
-
-            if (this.hasLegend()) {
-                this.element_chart.className = 'netdata-chart-with-legend-right netdata-' + this.library_name + '-chart-with-legend-right';
-            } else {
-                this.element_chart.className = ' netdata-chart netdata-' + this.library_name + '-chart';
-            }
-        }
-
-        if (this.hasLegend()) {
-            if (this.element_legend === null) {
-                this.element_legend = document.createElement('div');
-                this.element_legend.className = 'netdata-chart-legend netdata-' + this.library_name + '-legend';
-                this.element.appendChild(this.element_legend);
-            } else {
-                this.element_legend.innerHTML = '';
-            }
-
-            this.element_legend_childs = {
-                content: content,
-                resize_handler: null,
-                toolbox: null,
-                toolbox_left: null,
-                toolbox_right: null,
-                toolbox_reset: null,
-                toolbox_zoomin: null,
-                toolbox_zoomout: null,
-                toolbox_volume: null,
-                title_date: document.createElement('span'),
-                title_time: document.createElement('span'),
-                title_units: document.createElement('span'),
-                perfect_scroller: document.createElement('div'),
-                series: {}
-            };
-
-            if (NETDATA.options.current.legend_toolbox && this.library.toolboxPanAndZoom !== null) {
-                this.element_legend_childs.toolbox = document.createElement('div');
-                this.element_legend_childs.toolbox_left = document.createElement('div');
-                this.element_legend_childs.toolbox_right = document.createElement('div');
-                this.element_legend_childs.toolbox_reset = document.createElement('div');
-                this.element_legend_childs.toolbox_zoomin = document.createElement('div');
-                this.element_legend_childs.toolbox_zoomout = document.createElement('div');
-                this.element_legend_childs.toolbox_volume = document.createElement('div');
-
-                const getPanAndZoomStep = function (event) {
-                    if (event.ctrlKey) {
-                        return NETDATA.options.current.pan_and_zoom_factor * NETDATA.options.current.pan_and_zoom_factor_multiplier_control;
-                    } else if (event.shiftKey) {
-                        return NETDATA.options.current.pan_and_zoom_factor * NETDATA.options.current.pan_and_zoom_factor_multiplier_shift;
-                    } else if (event.altKey) {
-                        return NETDATA.options.current.pan_and_zoom_factor * NETDATA.options.current.pan_and_zoom_factor_multiplier_alt;
-                    } else {
-                        return NETDATA.options.current.pan_and_zoom_factor;
-                    }
-                };
-
-                this.element_legend_childs.toolbox.className += ' netdata-legend-toolbox';
-                this.element.appendChild(this.element_legend_childs.toolbox);
-
-                this.element_legend_childs.toolbox_left.className += ' netdata-legend-toolbox-button';
-                this.element_legend_childs.toolbox_left.innerHTML = NETDATA.icons.left;
-                this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_left);
-                this.element_legend_childs.toolbox_left.onclick = function (e) {
-                    e.preventDefault();
-
-                    let step = (that.view_before - that.view_after) * getPanAndZoomStep(e);
-                    let before = that.view_before - step;
-                    let after = that.view_after - step;
-                    if (after >= that.netdata_first) {
-                        that.library.toolboxPanAndZoom(that, after, before);
-                    }
-                };
-                if (NETDATA.options.current.show_help) {
-                    $(this.element_legend_childs.toolbox_left).popover({
-                        container: "body",
-                        animation: false,
-                        html: true,
-                        trigger: 'hover',
-                        placement: 'bottom',
-                        delay: {
-                            show: NETDATA.options.current.show_help_delay_show_ms,
-                            hide: NETDATA.options.current.show_help_delay_hide_ms
-                        },
-                        title: 'Pan Left',
-                        content: 'Pan the chart to the left. You can also <b>drag it</b> with your mouse or your finger (on touch devices).<br/><small>Help can be disabled from the settings.</small>'
-                    });
-                }
-
-                this.element_legend_childs.toolbox_reset.className += ' netdata-legend-toolbox-button';
-                this.element_legend_childs.toolbox_reset.innerHTML = NETDATA.icons.reset;
-                this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_reset);
-                this.element_legend_childs.toolbox_reset.onclick = function (e) {
-                    e.preventDefault();
-                    NETDATA.resetAllCharts(that);
-                };
-                if (NETDATA.options.current.show_help) {
-                    $(this.element_legend_childs.toolbox_reset).popover({
-                        container: "body",
-                        animation: false,
-                        html: true,
-                        trigger: 'hover',
-                        placement: 'bottom',
-                        delay: {
-                            show: NETDATA.options.current.show_help_delay_show_ms,
-                            hide: NETDATA.options.current.show_help_delay_hide_ms
-                        },
-                        title: 'Chart Reset',
-                        content: 'Reset all the charts to their default auto-refreshing state. You can also <b>double click</b> the chart contents with your mouse or your finger (on touch devices).<br/><small>Help can be disabled from the settings.</small>'
-                    });
-                }
-
-                this.element_legend_childs.toolbox_right.className += ' netdata-legend-toolbox-button';
-                this.element_legend_childs.toolbox_right.innerHTML = NETDATA.icons.right;
-                this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_right);
-                this.element_legend_childs.toolbox_right.onclick = function (e) {
-                    e.preventDefault();
-                    let step = (that.view_before - that.view_after) * getPanAndZoomStep(e);
-                    let before = that.view_before + step;
-                    let after = that.view_after + step;
-                    if (before <= that.netdata_last) {
-                        that.library.toolboxPanAndZoom(that, after, before);
-                    }
-                };
-                if (NETDATA.options.current.show_help) {
-                    $(this.element_legend_childs.toolbox_right).popover({
-                        container: "body",
-                        animation: false,
-                        html: true,
-                        trigger: 'hover',
-                        placement: 'bottom',
-                        delay: {
-                            show: NETDATA.options.current.show_help_delay_show_ms,
-                            hide: NETDATA.options.current.show_help_delay_hide_ms
-                        },
-                        title: 'Pan Right',
-                        content: 'Pan the chart to the right. You can also <b>drag it</b> with your mouse or your finger (on touch devices).<br/><small>Help can be disabled from the settings.</small>'
-                    });
-                }
-
-                this.element_legend_childs.toolbox_zoomin.className += ' netdata-legend-toolbox-button';
-                this.element_legend_childs.toolbox_zoomin.innerHTML = NETDATA.icons.zoomIn;
-                this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_zoomin);
-                this.element_legend_childs.toolbox_zoomin.onclick = function (e) {
-                    e.preventDefault();
-                    let dt = ((that.view_before - that.view_after) * (getPanAndZoomStep(e) * 0.8) / 2);
-                    let before = that.view_before - dt;
-                    let after = that.view_after + dt;
-                    that.library.toolboxPanAndZoom(that, after, before);
-                };
-                if (NETDATA.options.current.show_help) {
-                    $(this.element_legend_childs.toolbox_zoomin).popover({
-                        container: "body",
-                        animation: false,
-                        html: true,
-                        trigger: 'hover',
-                        placement: 'bottom',
-                        delay: {
-                            show: NETDATA.options.current.show_help_delay_show_ms,
-                            hide: NETDATA.options.current.show_help_delay_hide_ms
-                        },
-                        title: 'Chart Zoom In',
-                        content: 'Zoom in the chart. You can also press SHIFT and select an area of the chart, or press SHIFT or ALT and use the mouse wheel or 2-finger touchpad scroll to zoom in or out.<br/><small>Help can be disabled from the settings.</small>'
-                    });
-                }
-
-                this.element_legend_childs.toolbox_zoomout.className += ' netdata-legend-toolbox-button';
-                this.element_legend_childs.toolbox_zoomout.innerHTML = NETDATA.icons.zoomOut;
-                this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_zoomout);
-                this.element_legend_childs.toolbox_zoomout.onclick = function (e) {
-                    e.preventDefault();
-                    let dt = (((that.view_before - that.view_after) / (1.0 - (getPanAndZoomStep(e) * 0.8)) - (that.view_before - that.view_after)) / 2);
-                    let before = that.view_before + dt;
-                    let after = that.view_after - dt;
-
-                    that.library.toolboxPanAndZoom(that, after, before);
-                };
-                if (NETDATA.options.current.show_help) {
-                    $(this.element_legend_childs.toolbox_zoomout).popover({
-                        container: "body",
-                        animation: false,
-                        html: true,
-                        trigger: 'hover',
-                        placement: 'bottom',
-                        delay: {
-                            show: NETDATA.options.current.show_help_delay_show_ms,
-                            hide: NETDATA.options.current.show_help_delay_hide_ms
-                        },
-                        title: 'Chart Zoom Out',
-                        content: 'Zoom out the chart. You can also press SHIFT or ALT and use the mouse wheel, or 2-finger touchpad scroll to zoom in or out.<br/><small>Help can be disabled from the settings.</small>'
-                    });
-                }
-
-                //this.element_legend_childs.toolbox_volume.className += ' netdata-legend-toolbox-button';
-                //this.element_legend_childs.toolbox_volume.innerHTML = '<i class="fas fa-sort-amount-down"></i>';
-                //this.element_legend_childs.toolbox_volume.title = 'Visible Volume';
-                //this.element_legend_childs.toolbox.appendChild(this.element_legend_childs.toolbox_volume);
-                //this.element_legend_childs.toolbox_volume.onclick = function(e) {
-                //e.preventDefault();
-                //alert('clicked toolbox_volume on ' + that.id);
-                //}
-            }
-
-            if (NETDATA.options.current.resize_charts) {
-                this.element_legend_childs.resize_handler = document.createElement('div');
-
-                this.element_legend_childs.resize_handler.className += " netdata-legend-resize-handler";
-                this.element_legend_childs.resize_handler.innerHTML = NETDATA.icons.resize;
-                this.element.appendChild(this.element_legend_childs.resize_handler);
-                if (NETDATA.options.current.show_help) {
-                    $(this.element_legend_childs.resize_handler).popover({
-                        container: "body",
-                        animation: false,
-                        html: true,
-                        trigger: 'hover',
-                        placement: 'bottom',
-                        delay: {
-                            show: NETDATA.options.current.show_help_delay_show_ms,
-                            hide: NETDATA.options.current.show_help_delay_hide_ms
-                        },
-                        title: 'Chart Resize',
-                        content: 'Drag this point with your mouse or your finger (on touch devices), to resize the chart vertically. You can also <b>double click it</b> or <b>double tap it</b> to reset between 2 states: the default and the one that fits all the values.<br/><small>Help can be disabled from the settings.</small>'
-                    });
-                }
-
-                // mousedown event
-                this.element_legend_childs.resize_handler.onmousedown =
-                    function (e) {
-                        that.resizeHandler(e);
-                    };
-
-                // touchstart event
-                this.element_legend_childs.resize_handler.addEventListener('touchstart', function (e) {
-                    that.resizeHandler(e);
-                }, false);
-            }
-
-            if (this.chart) {
-                this.element_legend_childs.title_date.title = this.legendPluginModuleString(true);
-                this.element_legend_childs.title_time.title = this.legendResolutionTooltip();
-            }
-
-            this.element_legend_childs.title_date.className += " netdata-legend-title-date";
-            this.element_legend.appendChild(this.element_legend_childs.title_date);
-            this.tmp.__last_shown_legend_date = undefined;
-
-            this.element_legend.appendChild(document.createElement('br'));
-
-            this.element_legend_childs.title_time.className += " netdata-legend-title-time";
-            this.element_legend.appendChild(this.element_legend_childs.title_time);
-            this.tmp.__last_shown_legend_time = undefined;
-
-            this.element_legend.appendChild(document.createElement('br'));
-
-            this.element_legend_childs.title_units.className += " netdata-legend-title-units";
-            this.element_legend_childs.title_units.innerText = this.units_current;
-            this.element_legend.appendChild(this.element_legend_childs.title_units);
-            this.tmp.__last_shown_legend_units = undefined;
-
-            this.element_legend.appendChild(document.createElement('br'));
-
-            this.element_legend_childs.perfect_scroller.className = 'netdata-legend-series';
-            this.element_legend.appendChild(this.element_legend_childs.perfect_scroller);
-
-            content.className = 'netdata-legend-series-content';
-            this.element_legend_childs.perfect_scroller.appendChild(content);
-
-            this.element_legend_childs.content = content;
-
-            if (NETDATA.options.current.show_help) {
-                $(content).popover({
-                    container: "body",
-                    animation: false,
-                    html: true,
-                    trigger: 'hover',
-                    placement: 'bottom',
-                    title: 'Chart Legend',
-                    delay: {
-                        show: NETDATA.options.current.show_help_delay_show_ms,
-                        hide: NETDATA.options.current.show_help_delay_hide_ms
-                    },
-                    content: 'You can click or tap on the values or the labels to select dimensions. By pressing SHIFT or CONTROL, you can enable or disable multiple dimensions.<br/><small>Help can be disabled from the settings.</small>'
-                });
-            }
-        } else {
-            this.element_legend_childs = {
-                content: content,
-                resize_handler: null,
-                toolbox: null,
-                toolbox_left: null,
-                toolbox_right: null,
-                toolbox_reset: null,
-                toolbox_zoomin: null,
-                toolbox_zoomout: null,
-                toolbox_volume: null,
-                title_date: null,
-                title_time: null,
-                title_units: null,
-                perfect_scroller: null,
-                series: {}
-            };
-        }
-
-        if (this.data) {
-            this.element_legend_childs.series.labels_key = this.data.dimension_names.toString();
-            if (this.debug) {
-                this.log('labels from data: "' + this.element_legend_childs.series.labels_key + '"');
-            }
-
-            for (let i = 0, len = this.data.dimension_names.length; i < len; i++) {
-                genLabel(this, content, this.data.dimension_ids[i], this.data.dimension_names[i], i);
-            }
-        } else {
-            let tmp = [];
-            keys = Object.keys(this.chart.dimensions);
-            for (let i = 0, len = keys.length; i < len; i++) {
-                dim = keys[i];
-                tmp.push(this.chart.dimensions[dim].name);
-                genLabel(this, content, dim, this.chart.dimensions[dim].name, i);
-            }
-            this.element_legend_childs.series.labels_key = tmp.toString();
-            if (this.debug) {
-                this.log('labels from chart: "' + this.element_legend_childs.series.labels_key + '"');
-            }
-        }
-
-        // create a hidden div to be used for hidding
-        // the original legend of the chart library
-        let el = document.createElement('div');
-        if (this.element_legend !== null) {
-            this.element_legend.appendChild(el);
-        }
-        el.style.display = 'none';
-
-        this.element_legend_childs.hidden = document.createElement('div');
-        el.appendChild(this.element_legend_childs.hidden);
-
-        if (this.element_legend_childs.perfect_scroller !== null) {
-            Ps.initialize(this.element_legend_childs.perfect_scroller, {
-                wheelSpeed: 0.2,
-                wheelPropagation: true,
-                swipePropagation: true,
-                minScrollbarLength: null,
-                maxScrollbarLength: null,
-                useBothWheelAxes: false,
-                suppressScrollX: true,
-                suppressScrollY: false,
-                scrollXMarginOffset: 0,
-                scrollYMarginOffset: 0,
-                theme: 'default'
-            });
-            Ps.update(this.element_legend_childs.perfect_scroller);
-        }
-
-        this.legendShowLatestValues();
-    };
-
-    this.hasLegend = function () {
-        if (typeof this.tmp.___hasLegendCache___ !== 'undefined') {
-            return this.tmp.___hasLegendCache___;
-        }
-
-        let leg = false;
-        if (this.library && this.library.legend(this) === 'right-side') {
-            leg = true;
-        }
-
-        this.tmp.___hasLegendCache___ = leg;
-        return leg;
-    };
-
-    this.legendWidth = function () {
-        return (this.hasLegend()) ? 140 : 0;
-    };
-
-    this.legendHeight = function () {
-        return $(this.element).height();
-    };
-
-    this.chartWidth = function () {
-        return $(this.element).width() - this.legendWidth();
-    };
-
-    this.chartHeight = function () {
-        return $(this.element).height();
-    };
-
-    this.chartPixelsPerPoint = function () {
-        // force an options provided detail
-        let px = this.pixels_per_point;
-
-        if (this.library && px < this.library.pixels_per_point(this)) {
-            px = this.library.pixels_per_point(this);
-        }
-
-        if (px < NETDATA.options.current.pixels_per_point) {
-            px = NETDATA.options.current.pixels_per_point;
-        }
-
-        return px;
-    };
-
-    this.needsRecreation = function () {
-        let ret = (
-            this.chart_created &&
-            this.library &&
-            this.library.autoresize() === false &&
-            this.tm.last_resized < NETDATA.options.last_page_resize
-        );
-
-        if (this.debug) {
-            this.log('needsRecreation(): ' + ret.toString() + ', chart_created = ' + this.chart_created.toString());
-        }
-
-        return ret;
-    };
-
-    this.chartDataUniqueID = function () {
-        return this.id + ',' + this.library_name + ',' + this.dimensions + ',' + this.chartURLOptions(true);
-    };
-
-    this.chartURLOptions = function (isForUniqueId) {
-        let ret = '';
-
-        if (this.override_options !== null) {
-            ret = this.override_options.toString();
-        } else {
-            ret = this.library.options(this);
-        }
-
-        if (this.append_options !== null) {
-            ret += '%7C' + this.append_options.toString();
-        }
-
-        ret += '%7C' + 'jsonwrap';
-
-        // always add `nonzero` when it's used to create a chartDataUniqueID
-        // we cannot just remove `nonzero` because of backwards compatibility with old snapshots
-        if (isForUniqueId || NETDATA.options.current.eliminate_zero_dimensions) {
-            ret += '%7C' + 'nonzero';
-        }
-
-        return ret;
-    };
-
-    this.chartURL = function () {
-        let after, before, points_multiplier = 1;
-        if (NETDATA.globalPanAndZoom.isActive()) {
-            if (this.current.force_before_ms !== null && this.current.force_after_ms !== null) {
-                this.tm.pan_and_zoom_seq = 0;
-
-                before = Math.round(this.current.force_before_ms / 1000);
-                after = Math.round(this.current.force_after_ms / 1000);
-                this.view_after = after * 1000;
-                this.view_before = before * 1000;
-
-                if (NETDATA.options.current.pan_and_zoom_data_padding) {
-                    this.requested_padding = Math.round((before - after) / 2);
-                    after -= this.requested_padding;
-                    before += this.requested_padding;
-                    this.requested_padding *= 1000;
-                    points_multiplier = 2;
-                }
-
-                this.current.force_before_ms = null;
-                this.current.force_after_ms = null;
-            } else {
-                this.tm.pan_and_zoom_seq = NETDATA.globalPanAndZoom.seq;
-
-                after = Math.round(NETDATA.globalPanAndZoom.force_after_ms / 1000);
-                before = Math.round(NETDATA.globalPanAndZoom.force_before_ms / 1000);
-                this.view_after = after * 1000;
-                this.view_before = before * 1000;
-
-                this.requested_padding = null;
-                points_multiplier = 1;
-            }
-        } else {
-            this.tm.pan_and_zoom_seq = 0;
-
-            before = this.before;
-            after = this.after;
-            this.view_after = after * 1000;
-            this.view_before = before * 1000;
-
-            this.requested_padding = null;
-            points_multiplier = 1;
-        }
-
-        this.requested_after = after * 1000;
-        this.requested_before = before * 1000;
-
-        let data_points;
-        if (NETDATA.options.force_data_points !== 0) {
-            data_points = NETDATA.options.force_data_points;
-            this.data_points = data_points;
-        } else {
-            this.data_points = this.points || Math.round(this.chartWidth() / this.chartPixelsPerPoint());
-            data_points = this.data_points * points_multiplier;
-        }
-
-        // build the data URL
-        this.data_url = this.host + this.chart.data_url;
-        this.data_url += "&format=" + this.library.format();
-        this.data_url += "&points=" + (data_points).toString();
-        this.data_url += "&group=" + this.method;
-        this.data_url += "&gtime=" + this.gtime;
-        this.data_url += "&options=" + this.chartURLOptions();
-
-        if (after) {
-            this.data_url += "&after=" + after.toString();
-        }
-
-        if (before) {
-            this.data_url += "&before=" + before.toString();
-        }
-
-        if (this.dimensions) {
-            this.data_url += "&dimensions=" + this.dimensions;
-        }
-
-        if (NETDATA.options.debug.chart_data_url || this.debug) {
-            this.log('chartURL(): ' + this.data_url + ' WxH:' + this.chartWidth() + 'x' + this.chartHeight() + ' points: ' + data_points.toString() + ' library: ' + this.library_name);
-        }
-    };
-
-    this.redrawChart = function () {
-        if (this.data !== null) {
-            this.updateChartWithData(this.data);
-        }
-    };
-
-    this.updateChartWithData = function (data) {
-        if (this.debug) {
-            this.log('updateChartWithData() called.');
-        }
-
-        // this may force the chart to be re-created
-        resizeChart();
-
-        this.data = data;
-
-        let started = Date.now();
-        let view_update_every = data.view_update_every * 1000;
-
-        if (this.data_update_every !== view_update_every) {
-            if (this.element_legend_childs.title_time) {
-                this.element_legend_childs.title_time.title = this.legendResolutionTooltip();
-            }
-        }
-
-        // if the result is JSON, find the latest update-every
-        this.data_update_every = view_update_every;
-        this.data_after = data.after * 1000;
-        this.data_before = data.before * 1000;
-        this.netdata_first = data.first_entry * 1000;
-        this.netdata_last = data.last_entry * 1000;
-        this.data_points = data.points;
-
-        data.state = this;
-
-        if (NETDATA.options.current.pan_and_zoom_data_padding && this.requested_padding !== null) {
-            if (this.view_after < this.data_after) {
-                // console.log('adjusting view_after from ' + this.view_after + ' to ' + this.data_after);
-                this.view_after = this.data_after;
-            }
-
-            if (this.view_before > this.data_before) {
-                // console.log('adjusting view_before from ' + this.view_before + ' to ' + this.data_before);
-                this.view_before = this.data_before;
-            }
-        } else {
-            this.view_after = this.data_after;
-            this.view_before = this.data_before;
-        }
-
-        if (this.debug) {
-            this.log('UPDATE No ' + this.updates_counter + ' COMPLETED');
-
-            if (this.current.force_after_ms) {
-                this.log('STATUS: forced    : ' + (this.current.force_after_ms / 1000).toString() + ' - ' + (this.current.force_before_ms / 1000).toString());
-            } else {
-                this.log('STATUS: forced    : unset');
-            }
-
-            this.log('STATUS: requested : ' + (this.requested_after / 1000).toString() + ' - ' + (this.requested_before / 1000).toString());
-            this.log('STATUS: downloaded: ' + (this.data_after / 1000).toString() + ' - ' + (this.data_before / 1000).toString());
-            this.log('STATUS: rendered  : ' + (this.view_after / 1000).toString() + ' - ' + (this.view_before / 1000).toString());
-            this.log('STATUS: points    : ' + (this.data_points).toString());
-        }
-
-        if (this.data_points === 0) {
-            noDataToShow();
-            return;
-        }
-
-        if (this.updates_since_last_creation >= this.library.max_updates_to_recreate()) {
-            if (this.debug) {
-                this.log('max updates of ' + this.updates_since_last_creation.toString() + ' reached. Forcing re-generation.');
-            }
-
-            init('force');
-            return;
-        }
-
-        // check and update the legend
-        this.legendUpdateDOM();
-
-        if (this.chart_created && typeof this.library.update === 'function') {
-            if (this.debug) {
-                this.log('updating chart...');
-            }
-
-            if (!callChartLibraryUpdateSafely(data)) {
-                return;
-            }
-        } else {
-            if (this.debug) {
-                this.log('creating chart...');
-            }
-
-            if (!callChartLibraryCreateSafely(data)) {
-                return;
-            }
-        }
-
-        if (this.isVisible()) {
-            hideMessage();
-            this.legendShowLatestValues();
-        } else {
-            this.__redraw_on_unhide = true;
-
-            if (this.debug) {
-                this.log("drawn while not visible");
-            }
-        }
-
-        if (this.selected) {
-            NETDATA.globalSelectionSync.stop();
-        }
-
-        // update the performance counters
-        let now = Date.now();
-        this.tm.last_updated = now;
-
-        // don't update last_autorefreshed if this chart is
-        // forced to be updated with global PanAndZoom
-        if (NETDATA.globalPanAndZoom.isActive()) {
-            this.tm.last_autorefreshed = 0;
-        } else {
-            if (NETDATA.options.current.parallel_refresher && NETDATA.options.current.concurrent_refreshes && typeof this.force_update_every !== 'number') {
-                this.tm.last_autorefreshed = now - (now % this.data_update_every);
-            } else {
-                this.tm.last_autorefreshed = now;
-            }
-        }
-
-        this.refresh_dt_ms = now - started;
-        NETDATA.options.auto_refresher_fast_weight += this.refresh_dt_ms;
-
-        if (this.refresh_dt_element !== null) {
-            this.refresh_dt_element.innerText = this.refresh_dt_ms.toString();
-        }
-
-        if (this.foreignElementBefore !== null) {
-            this.foreignElementBefore.innerText = NETDATA.dateTime.localeDateString(this.view_before) + ' ' + NETDATA.dateTime.localeTimeString(this.view_before);
-        }
-
-        if (this.foreignElementAfter !== null) {
-            this.foreignElementAfter.innerText = NETDATA.dateTime.localeDateString(this.view_after) + ' ' + NETDATA.dateTime.localeTimeString(this.view_after);
-        }
-
-        if (this.foreignElementDuration !== null) {
-            this.foreignElementDuration.innerText = NETDATA.seconds4human(Math.floor((this.view_before - this.view_after) / 1000) + 1);
-        }
-
-        if (this.foreignElementUpdateEvery !== null) {
-            this.foreignElementUpdateEvery.innerText = NETDATA.seconds4human(Math.floor(this.data_update_every / 1000));
-        }
-    };
-
-    this.getSnapshotData = function (key) {
-        if (this.debug) {
-            this.log('updating from snapshot: ' + key);
-        }
-
-        if (typeof netdataSnapshotData.data[key] === 'undefined') {
-            this.log('snapshot does not include data for key "' + key + '"');
-            return null;
-        }
-
-        if (typeof netdataSnapshotData.data[key] !== 'string') {
-            this.log('snapshot data for key "' + key + '" is not string');
-            return null;
-        }
-
-        let uncompressed;
-        try {
-            uncompressed = netdataSnapshotData.uncompress(netdataSnapshotData.data[key]);
-
-            if (uncompressed === null) {
-                this.log('uncompressed snapshot data for key ' + key + ' is null');
-                return null;
-            }
-
-            if (typeof uncompressed === 'undefined') {
-                this.log('uncompressed snapshot data for key ' + key + ' is undefined');
-                return null;
-            }
-        } catch (e) {
-            this.log('decompression of snapshot data for key ' + key + ' failed');
-            console.log(e);
-            uncompressed = null;
-        }
-
-        if (typeof uncompressed !== 'string') {
-            this.log('uncompressed snapshot data for key ' + key + ' is not string');
-            return null;
-        }
-
-        let data;
-        try {
-            data = JSON.parse(uncompressed);
-        } catch (e) {
-            this.log('parsing snapshot data for key ' + key + ' failed');
-            console.log(e);
-            data = null;
-        }
-
-        return data;
-    };
-
-    this.updateChart = function (callback) {
-        if (this.debug) {
-            this.log('updateChart()');
-        }
-
-        if (this.fetching_data) {
-            if (this.debug) {
-                this.log('updateChart(): I am already updating...');
-            }
-
-            if (typeof callback === 'function') {
-                return callback(false, 'already running');
-            }
-
-            return;
-        }
-
-        // due to late initialization of charts and libraries
-        // we need to check this too
-        if (!this.enabled) {
-            if (this.debug) {
-                this.log('updateChart(): I am not enabled');
-            }
-
-            if (typeof callback === 'function') {
-                return callback(false, 'not enabled');
-            }
-
-            return;
-        }
-
-        if (!canBeRendered()) {
-            if (this.debug) {
-                this.log('updateChart(): cannot be rendered');
-            }
-
-            if (typeof callback === 'function') {
-                return callback(false, 'cannot be rendered');
-            }
-
-            return;
-        }
-
-        if (that.dom_created !== true) {
-            if (this.debug) {
-                this.log('updateChart(): creating DOM');
-            }
-
-            createDOM();
-        }
-
-        if (this.chart === null) {
-            if (this.debug) {
-                this.log('updateChart(): getting chart');
-            }
-
-            return this.getChart(function () {
-                return that.updateChart(callback);
-            });
-        }
-
-        if (!this.library.initialized) {
-            if (this.library.enabled) {
-                if (this.debug) {
-                    this.log('updateChart(): initializing chart library');
-                }
-
-                return this.library.initialize(function () {
-                    return that.updateChart(callback);
-                });
-            } else {
-                error('chart library "' + this.library_name + '" is not available.');
-
-                if (typeof callback === 'function') {
-                    return callback(false, 'library not available');
-                }
-
-                return;
-            }
-        }
-
-        this.clearSelection();
-        this.chartURL();
-
-        NETDATA.statistics.refreshes_total++;
-        NETDATA.statistics.refreshes_active++;
-
-        if (NETDATA.statistics.refreshes_active > NETDATA.statistics.refreshes_active_max) {
-            NETDATA.statistics.refreshes_active_max = NETDATA.statistics.refreshes_active;
-        }
-
-        let ok = false;
-        this.fetching_data = true;
-
-        if (netdataSnapshotData !== null) {
-            let key = this.chartDataUniqueID();
-            let data = this.getSnapshotData(key);
-            if (data !== null) {
-                ok = true;
-                data = NETDATA.xss.checkData('/api/v1/data', data, this.library.xssRegexIgnore);
-                this.updateChartWithData(data);
-            } else {
-                ok = false;
-                error('cannot get data from snapshot for key: "' + key + '"');
-                that.tm.last_autorefreshed = Date.now();
-            }
-
-            NETDATA.statistics.refreshes_active--;
-            this.fetching_data = false;
-
-            if (typeof callback === 'function') {
-                callback(ok, 'snapshot');
-            }
-
-            return;
-        }
-
-        if (this.debug) {
-            this.log('updating from ' + this.data_url);
-        }
-
-        this.xhr = $.ajax({
-            url: this.data_url,
-            cache: false,
-            async: true,
-            headers: {
-                'Cache-Control': 'no-cache, no-store',
-                'Pragma': 'no-cache'
-            },
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function (data) {
-                data = NETDATA.xss.checkData('/api/v1/data', data, that.library.xssRegexIgnore);
-
-                that.xhr = undefined;
-                that.retries_on_data_failures = 0;
-                ok = true;
-
-                if (that.debug) {
-                    that.log('data received. updating chart.');
-                }
-
-                that.updateChartWithData(data);
-            })
-            .fail(function (msg) {
-                that.xhr = undefined;
-
-                if (msg.statusText !== 'abort') {
-                    that.retries_on_data_failures++;
-                    if (that.retries_on_data_failures > NETDATA.options.current.retries_on_data_failures) {
-                        // that.log('failed ' + that.retries_on_data_failures.toString() + ' times - giving up');
-                        that.retries_on_data_failures = 0;
-                        error('data download failed for url: ' + that.data_url);
-                    }
-                    else {
-                        that.tm.last_autorefreshed = Date.now();
-                        // that.log('failed ' + that.retries_on_data_failures.toString() + ' times, but I will retry');
-                    }
-                }
-            })
-            .always(function () {
-                that.xhr = undefined;
-
-                NETDATA.statistics.refreshes_active--;
-                that.fetching_data = false;
-
-                if (typeof callback === 'function') {
-                    return callback(ok, 'download');
-                }
-            });
-    };
-
-    const __isVisible = function () {
-        let ret = true;
-
-        if (NETDATA.options.current.update_only_visible !== false) {
-            // tolerance is the number of pixels a chart can be off-screen
-            // to consider it as visible and refresh it as if was visible
-            let tolerance = 0;
-
-            that.tm.last_visible_check = Date.now();
-
-            let rect = that.element.getBoundingClientRect();
-
-            let screenTop = window.scrollY;
-            let screenBottom = screenTop + window.innerHeight;
-
-            let chartTop = rect.top + screenTop;
-            let chartBottom = chartTop + rect.height;
-
-            ret = !(rect.width === 0 || rect.height === 0 || chartBottom + tolerance < screenTop || chartTop - tolerance > screenBottom);
-        }
-
-        if (that.debug) {
-            that.log('__isVisible(): ' + ret);
-        }
-
-        return ret;
-    };
-
-    this.isVisible = function (nocache) {
-        // this.log('last_visible_check: ' + this.tm.last_visible_check + ', last_page_scroll: ' + NETDATA.options.last_page_scroll);
-
-        // caching - we do not evaluate the charts visibility
-        // if the page has not been scrolled since the last check
-        if ((typeof nocache !== 'undefined' && nocache)
-            || typeof this.tmp.___isVisible___ === 'undefined'
-            || this.tm.last_visible_check <= NETDATA.options.last_page_scroll) {
-            this.tmp.___isVisible___ = __isVisible();
-            if (this.tmp.___isVisible___) {
-                this.unhideChart();
-            } else {
-                this.hideChart();
-            }
-        }
-
-        if (this.debug) {
-            this.log('isVisible(' + nocache + '): ' + this.tmp.___isVisible___);
-        }
-
-        return this.tmp.___isVisible___;
-    };
-
-    this.isAutoRefreshable = function () {
-        return (this.current.autorefresh);
-    };
-
-    this.canBeAutoRefreshed = function () {
-        if (!this.enabled) {
-            if (this.debug) {
-                this.log('canBeAutoRefreshed() -> not enabled');
-            }
-
-            return false;
-        }
-
-        if (this.running) {
-            if (this.debug) {
-                this.log('canBeAutoRefreshed() -> already running');
-            }
-
-            return false;
-        }
-
-        if (this.library === null || this.library.enabled === false) {
-            error('charting library "' + this.library_name + '" is not available');
-            if (this.debug) {
-                this.log('canBeAutoRefreshed() -> chart library ' + this.library_name + ' is not available');
-            }
-
-            return false;
-        }
-
-        if (!this.isVisible()) {
-            if (NETDATA.options.debug.visibility || this.debug) {
-                this.log('canBeAutoRefreshed() -> not visible');
-            }
-
-            return false;
-        }
-
-        let now = Date.now();
-
-        if (this.current.force_update_at !== 0 && this.current.force_update_at < now) {
-            if (this.debug) {
-                this.log('canBeAutoRefreshed() -> timed force update - allowing this update');
-            }
-
-            this.current.force_update_at = 0;
-            return true;
-        }
-
-        if (!this.isAutoRefreshable()) {
-            if (this.debug) {
-                this.log('canBeAutoRefreshed() -> not auto-refreshable');
-            }
-
-            return false;
-        }
-
-        // allow the first update, even if the page is not visible
-        if (NETDATA.options.page_is_visible === false && this.updates_counter && this.updates_since_last_unhide) {
-            if (NETDATA.options.debug.focus || this.debug) {
-                this.log('canBeAutoRefreshed() -> not the first update, and page does not have focus');
-            }
-
-            return false;
-        }
-
-        if (this.needsRecreation()) {
-            if (this.debug) {
-                this.log('canBeAutoRefreshed() -> needs re-creation.');
-            }
-
-            return true;
-        }
-
-        if (NETDATA.options.auto_refresher_stop_until >= now) {
-            if (this.debug) {
-                this.log('canBeAutoRefreshed() -> stopped until is in future.');
-            }
-
-            return false;
-        }
-
-        // options valid only for autoRefresh()
-        if (NETDATA.globalPanAndZoom.isActive()) {
-            if (NETDATA.globalPanAndZoom.shouldBeAutoRefreshed(this)) {
-                if (this.debug) {
-                    this.log('canBeAutoRefreshed(): global panning: I need an update.');
-                }
-
-                return true;
-            }
-            else {
-                if (this.debug) {
-                    this.log('canBeAutoRefreshed(): global panning: I am already up to date.');
-                }
-
-                return false;
-            }
-        }
-
-        if (this.selected) {
-            if (this.debug) {
-                this.log('canBeAutoRefreshed(): I have a selection in place.');
-            }
-
-            return false;
-        }
-
-        if (this.paused) {
-            if (this.debug) {
-                this.log('canBeAutoRefreshed(): I am paused.');
-            }
-
-            return false;
-        }
-
-        let data_update_every = this.data_update_every;
-        if (typeof this.force_update_every === 'number') {
-            data_update_every = this.force_update_every;
-        }
-
-        if (now - this.tm.last_autorefreshed >= data_update_every) {
-            if (this.debug) {
-                this.log('canBeAutoRefreshed(): It is time to update me. Now: ' + now.toString() + ', last_autorefreshed: ' + this.tm.last_autorefreshed + ', data_update_every: ' + data_update_every + ', delta: ' + (now - this.tm.last_autorefreshed).toString());
-            }
-
-            return true;
-        }
-
-        return false;
-    };
-
-    this.autoRefresh = function (callback) {
-        let state = that;
-
-        if (state.canBeAutoRefreshed() && state.running === false) {
-            state.running = true;
-            state.updateChart(function () {
-                state.running = false;
-
-                if (typeof callback === 'function') {
-                    return callback();
-                }
-            });
-        } else {
-            if (typeof callback === 'function') {
-                return callback();
-            }
-        }
-    };
-
-    this.__defaultsFromDownloadedChart = function (chart) {
-        this.chart = chart;
-        this.chart_url = chart.url;
-        this.data_update_every = chart.update_every * 1000;
-        this.data_points = Math.round(this.chartWidth() / this.chartPixelsPerPoint());
-        this.tm.last_info_downloaded = Date.now();
-
-        if (this.title === null) {
-            this.title = chart.title;
-        }
-
-        if (this.units === null) {
-            this.units = chart.units;
-            this.units_current = this.units;
-        }
-    };
-
-    // fetch the chart description from the netdata server
-    this.getChart = function (callback) {
-        this.chart = NETDATA.chartRegistry.get(this.host, this.id);
-        if (this.chart) {
-            this.__defaultsFromDownloadedChart(this.chart);
-
-            if (typeof callback === 'function') {
-                return callback();
-            }
-        } else if (netdataSnapshotData !== null) {
-            // console.log(this);
-            // console.log(NETDATA.chartRegistry);
-            NETDATA.error(404, 'host: ' + this.host + ', chart: ' + this.id);
-            error('chart not found in snapshot');
-
-            if (typeof callback === 'function') {
-                return callback();
-            }
-        } else {
-            this.chart_url = "/api/v1/chart?chart=" + this.id;
-
-            if (this.debug) {
-                this.log('downloading ' + this.chart_url);
-            }
-
-            $.ajax({
-                url: this.host + this.chart_url,
-                cache: false,
-                async: true,
-                xhrFields: {withCredentials: true} // required for the cookie
-            })
-                .done(function (chart) {
-                    chart = NETDATA.xss.checkOptional('/api/v1/chart', chart);
-
-                    chart.url = that.chart_url;
-                    that.__defaultsFromDownloadedChart(chart);
-                    NETDATA.chartRegistry.add(that.host, that.id, chart);
-                })
-                .fail(function () {
-                    NETDATA.error(404, that.chart_url);
-                    error('chart not found on url "' + that.chart_url + '"');
-                })
-                .always(function () {
-                    if (typeof callback === 'function') {
-                        return callback();
-                    }
-                });
-        }
-    };
-
-    // ============================================================================================================
-    // INITIALIZATION
-
-    initDOM();
-    init('fast');
-};
-
-NETDATA.resetAllCharts = function (state) {
-    // first clear the global selection sync
-    // to make sure no chart is in selected state
-    NETDATA.globalSelectionSync.stop();
-
-    // there are 2 possibilities here
-    // a. state is the global Pan and Zoom master
-    // b. state is not the global Pan and Zoom master
-
-    // let master = true;
-    // if (NETDATA.globalPanAndZoom.isMaster(state) === false) {
-    //     master = false;
-    // }
-    const master = NETDATA.globalPanAndZoom.isMaster(state);
-
-    // clear the global Pan and Zoom
-    // this will also refresh the master
-    // and unblock any charts currently mirroring the master
-    NETDATA.globalPanAndZoom.clearMaster();
-
-    // if we were not the master, reset our status too
-    // this is required because most probably the mouse
-    // is over this chart, blocking it from auto-refreshing
-    if (master === false && (state.paused || state.selected)) {
-        state.resetChart();
-    }
-};
-
-// get or create a chart state, given a DOM element
-NETDATA.chartState = function (element) {
-    let self = $(element);
-
-    let state = self.data('netdata-state-object') || null;
-    if (state === null) {
-        state = new chartState(element);
-        self.data('netdata-state-object', state);
-    }
-    return state;
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-// Library functions
-
-// Load a script without jquery
-// This is used to load jquery - after it is loaded, we use jquery
-NETDATA._loadjQuery = function (callback) {
-    if (typeof jQuery === 'undefined') {
-        if (NETDATA.options.debug.main_loop) {
-            console.log('loading ' + NETDATA.jQuery);
-        }
-
-        let script = document.createElement('script');
-        script.type = 'text/javascript';
-        script.async = true;
-        script.src = NETDATA.jQuery;
-
-        // script.onabort = onError;
-        script.onerror = function () {
-            NETDATA.error(101, NETDATA.jQuery);
-        };
-        if (typeof callback === "function") {
-            script.onload = function () {
-                $ = jQuery;
-                return callback();
-            };
-        }
-
-        let s = document.getElementsByTagName('script')[0];
-        s.parentNode.insertBefore(script, s);
-    }
-    else if (typeof callback === "function") {
-        $ = jQuery;
-        return callback();
-    }
-};
-
-NETDATA._loadCSS = function (filename) {
-    // don't use jQuery here
-    // styles are loaded before jQuery
-    // to eliminate showing an unstyled page to the user
-
-    let fileref = document.createElement("link");
-    fileref.setAttribute("rel", "stylesheet");
-    fileref.setAttribute("type", "text/css");
-    fileref.setAttribute("href", filename);
-
-    if (typeof fileref !== 'undefined') {
-        document.getElementsByTagName("head")[0].appendChild(fileref);
-    }
-};
-
-// user function to signal us the DOM has been
-// updated.
-NETDATA.updatedDom = function () {
-    NETDATA.options.updated_dom = true;
-};
-
-NETDATA.ready = function (callback) {
-    NETDATA.options.pauseCallback = callback;
-};
-
-NETDATA.pause = function (callback) {
-    if (typeof callback === 'function') {
-        if (NETDATA.options.pause) {
-            return callback();
-        } else {
-            NETDATA.options.pauseCallback = callback;
-        }
-    }
-};
-
-NETDATA.unpause = function () {
-    NETDATA.options.pauseCallback = null;
-    NETDATA.options.updated_dom = true;
-    NETDATA.options.pause = false;
-};
-
-// ----------------------------------------------------------------------------------------------------------------
-
-// this is purely sequential charts refresher
-// it is meant to be autonomous
-NETDATA.chartRefresherNoParallel = function (index, callback) {
-    let targets = NETDATA.intersectionObserver.targets();
-
-    if (NETDATA.options.debug.main_loop) {
-        console.log('NETDATA.chartRefresherNoParallel(' + index + ')');
-    }
-
-    if (NETDATA.options.updated_dom) {
-        // the dom has been updated
-        // get the dom parts again
-        NETDATA.parseDom(callback);
-        return;
-    }
-    if (index >= targets.length) {
-        if (NETDATA.options.debug.main_loop) {
-            console.log('waiting to restart main loop...');
-        }
-
-        NETDATA.options.auto_refresher_fast_weight = 0;
-        callback();
-    } else {
-        let state = targets[index];
-
-        if (NETDATA.options.auto_refresher_fast_weight < NETDATA.options.current.fast_render_timeframe) {
-            if (NETDATA.options.debug.main_loop) {
-                console.log('fast rendering...');
-            }
-
-            if (state.isVisible()) {
-                NETDATA.timeout.set(function () {
-                    state.autoRefresh(function () {
-                        NETDATA.chartRefresherNoParallel(++index, callback);
-                    });
-                }, 0);
-            } else {
-                NETDATA.chartRefresherNoParallel(++index, callback);
-            }
-        } else {
-            if (NETDATA.options.debug.main_loop) {
-                console.log('waiting for next refresh...');
-            }
-            NETDATA.options.auto_refresher_fast_weight = 0;
-
-            NETDATA.timeout.set(function () {
-                state.autoRefresh(function () {
-                    NETDATA.chartRefresherNoParallel(++index, callback);
-                });
-            }, NETDATA.options.current.idle_between_charts);
-        }
-    }
-};
-
-NETDATA.chartRefresherWaitTime = function () {
-    return NETDATA.options.current.idle_parallel_loops;
-};
-
-// the default refresher
-NETDATA.chartRefresherLastRun = 0;
-NETDATA.chartRefresherRunsAfterParseDom = 0;
-NETDATA.chartRefresherTimeoutId = undefined;
-
-NETDATA.chartRefresherReschedule = function () {
-    if (NETDATA.options.current.async_on_scroll) {
-        if (NETDATA.chartRefresherTimeoutId) {
-            NETDATA.timeout.clear(NETDATA.chartRefresherTimeoutId);
-        }
-        NETDATA.chartRefresherTimeoutId = NETDATA.timeout.set(NETDATA.chartRefresher, NETDATA.options.current.onscroll_worker_duration_threshold);
-        //console.log('chartRefresherReschedule()');
-    }
-};
-
-NETDATA.chartRefresher = function () {
-    // console.log('chartRefresher() begin ' + (Date.now() - NETDATA.chartRefresherLastRun).toString() + ' ms since last run');
-
-    if (NETDATA.options.page_is_visible === false
-        && NETDATA.options.current.stop_updates_when_focus_is_lost
-        && NETDATA.chartRefresherLastRun > NETDATA.options.last_page_resize
-        && NETDATA.chartRefresherLastRun > NETDATA.options.last_page_scroll
-        && NETDATA.chartRefresherRunsAfterParseDom > 10
-    ) {
-        setTimeout(
-            NETDATA.chartRefresher,
-            NETDATA.options.current.idle_lost_focus
-        );
-
-        // console.log('chartRefresher() page without focus, will run in ' + NETDATA.options.current.idle_lost_focus.toString() + ' ms, ' + NETDATA.chartRefresherRunsAfterParseDom.toString());
-        return;
-    }
-    NETDATA.chartRefresherRunsAfterParseDom++;
-
-    let now = Date.now();
-    NETDATA.chartRefresherLastRun = now;
-
-    if (now < NETDATA.options.on_scroll_refresher_stop_until) {
-        NETDATA.chartRefresherTimeoutId = NETDATA.timeout.set(
-            NETDATA.chartRefresher,
-            NETDATA.chartRefresherWaitTime()
-        );
-
-        // console.log('chartRefresher() end1 will run in ' + NETDATA.chartRefresherWaitTime().toString() + ' ms');
-        return;
-    }
-
-    if (now < NETDATA.options.auto_refresher_stop_until) {
-        NETDATA.chartRefresherTimeoutId = NETDATA.timeout.set(
-            NETDATA.chartRefresher,
-            NETDATA.chartRefresherWaitTime()
-        );
-
-        // console.log('chartRefresher() end2 will run in ' + NETDATA.chartRefresherWaitTime().toString() + ' ms');
-        return;
-    }
-
-    if (NETDATA.options.pause) {
-        // console.log('auto-refresher is paused');
-        NETDATA.chartRefresherTimeoutId = NETDATA.timeout.set(
-            NETDATA.chartRefresher,
-            NETDATA.chartRefresherWaitTime()
-        );
-
-        // console.log('chartRefresher() end3 will run in ' + NETDATA.chartRefresherWaitTime().toString() + ' ms');
-        return;
-    }
-
-    if (typeof NETDATA.options.pauseCallback === 'function') {
-        // console.log('auto-refresher is calling pauseCallback');
-
-        NETDATA.options.pause = true;
-        NETDATA.options.pauseCallback();
-        NETDATA.chartRefresher();
-
-        // console.log('chartRefresher() end4 (nested)');
-        return;
-    }
-
-    if (!NETDATA.options.current.parallel_refresher) {
-        // console.log('auto-refresher is calling chartRefresherNoParallel(0)');
-        NETDATA.chartRefresherNoParallel(0, function () {
-            NETDATA.chartRefresherTimeoutId = NETDATA.timeout.set(
-                NETDATA.chartRefresher,
-                NETDATA.options.current.idle_between_loops
-            );
-        });
-        // console.log('chartRefresher() end5 (no parallel, nested)');
-        return;
-    }
-
-    if (NETDATA.options.updated_dom) {
-        // the dom has been updated
-        // get the dom parts again
-        // console.log('auto-refresher is calling parseDom()');
-        NETDATA.parseDom(NETDATA.chartRefresher);
-        // console.log('chartRefresher() end6 (parseDom)');
-        return;
-    }
-
-    if (!NETDATA.globalSelectionSync.active()) {
-        let parallel = [];
-        let targets = NETDATA.intersectionObserver.targets();
-        let len = targets.length;
-        let state;
-        while (len--) {
-            state = targets[len];
-            if (state.running || state.isVisible() === false) {
-                continue;
-            }
-
-            if (!state.library.initialized) {
-                if (state.library.enabled) {
-                    state.library.initialize(NETDATA.chartRefresher);
-                    //console.log('chartRefresher() end6 (library init)');
-                    return;
-                }
-                else {
-                    state.error('chart library "' + state.library_name + '" is not enabled.');
-                }
-            }
-
-            if (NETDATA.scrollUp) {
-                parallel.unshift(state);
-            } else {
-                parallel.push(state);
-            }
-        }
-
-        len = parallel.length;
-        while (len--) {
-            state = parallel[len];
-            // console.log('auto-refresher executing in parallel for ' + parallel.length.toString() + ' charts');
-            // this will execute the jobs in parallel
-
-            if (!state.running) {
-                NETDATA.timeout.set(state.autoRefresh, 0);
-            }
-        }
-        //else {
-        //    console.log('auto-refresher nothing to do');
-        //}
-    }
-
-    // run the next refresh iteration
-    NETDATA.chartRefresherTimeoutId = NETDATA.timeout.set(
-        NETDATA.chartRefresher,
-        NETDATA.chartRefresherWaitTime()
-    );
-
-    //console.log('chartRefresher() completed in ' + (Date.now() - now).toString() + ' ms');
-};
-
-NETDATA.parseDom = function (callback) {
-    //console.log('parseDom()');
-
-    NETDATA.options.last_page_scroll = Date.now();
-    NETDATA.options.updated_dom = false;
-    NETDATA.chartRefresherRunsAfterParseDom = 0;
-
-    let targets = $('div[data-netdata]'); //.filter(':visible');
-
-    if (NETDATA.options.debug.main_loop) {
-        console.log('DOM updated - there are ' + targets.length + ' charts on page.');
-    }
-
-    NETDATA.intersectionObserver.globalReset();
-    NETDATA.options.targets = [];
-    let len = targets.length;
-    while (len--) {
-        // the initialization will take care of sizing
-        // and the "loading..." message
-        let state = NETDATA.chartState(targets[len]);
-        NETDATA.options.targets.push(state);
-        NETDATA.intersectionObserver.observe(state);
-    }
-
-    if (NETDATA.globalChartUnderlay.isActive()) {
-        NETDATA.globalChartUnderlay.setup();
-    } else {
-        NETDATA.globalChartUnderlay.clear();
-    }
-
-    if (typeof callback === 'function') {
-        return callback();
-    }
-};
-
-// this is the main function - where everything starts
-NETDATA.started = false;
-NETDATA.start = function () {
-    // this should be called only once
-
-    if (NETDATA.started) {
-        console.log('netdata is already started');
-        return;
-    }
-
-    NETDATA.started = true;
-    NETDATA.options.page_is_visible = true;
-
-    $(window).blur(function () {
-        if (NETDATA.options.current.stop_updates_when_focus_is_lost) {
-            NETDATA.options.page_is_visible = false;
-            if (NETDATA.options.debug.focus) {
-                console.log('Lost Focus!');
-            }
-        }
-    });
-
-    $(window).focus(function () {
-        if (NETDATA.options.current.stop_updates_when_focus_is_lost) {
-            NETDATA.options.page_is_visible = true;
-            if (NETDATA.options.debug.focus) {
-                console.log('Focus restored!');
-            }
-        }
-    });
-
-    if (typeof document.hasFocus === 'function' && !document.hasFocus()) {
-        if (NETDATA.options.current.stop_updates_when_focus_is_lost) {
-            NETDATA.options.page_is_visible = false;
-            if (NETDATA.options.debug.focus) {
-                console.log('Document has no focus!');
-            }
-        }
-    }
-
-    // bootstrap tab switching
-    $('a[data-toggle="tab"]').on('shown.bs.tab', NETDATA.onscroll);
-
-    // bootstrap modal switching
-    let $modal = $('.modal');
-    $modal.on('hidden.bs.modal', NETDATA.onscroll);
-    $modal.on('shown.bs.modal', NETDATA.onscroll);
-
-    // bootstrap collapse switching
-    let $collapse = $('.collapse');
-    $collapse.on('hidden.bs.collapse', NETDATA.onscroll);
-    $collapse.on('shown.bs.collapse', NETDATA.onscroll);
-
-    NETDATA.parseDom(NETDATA.chartRefresher);
-
-    // Alarms initialization
-    setTimeout(NETDATA.alarms.init, 1000);
-
-    // Registry initialization
-    setTimeout(NETDATA.registry.init, netdataRegistryAfterMs);
-
-    if (typeof netdataCallback === 'function') {
-        netdataCallback();
-    }
-};
-
-NETDATA.globalReset = function () {
-    NETDATA.intersectionObserver.globalReset();
-    NETDATA.globalSelectionSync.globalReset();
-    NETDATA.globalPanAndZoom.globalReset();
-    NETDATA.chartRegistry.globalReset();
-    NETDATA.commonMin.globalReset();
-    NETDATA.commonMax.globalReset();
-    NETDATA.commonColors.globalReset();
-    NETDATA.unitsConversion.globalReset();
-    NETDATA.options.targets = [];
-    NETDATA.parseDom();
-    NETDATA.unpause();
-};
-
-// Registry of netdata hosts
-
-NETDATA.alarms = {
-    onclick: null,                  // the callback to handle the click - it will be called with the alarm log entry
-    chart_div_offset: -50,          // give that space above the chart when scrolling to it
-    chart_div_id_prefix: 'chart_',  // the chart DIV IDs have this prefix (they should be NETDATA.name2id(chart.id))
-    chart_div_animation_duration: 0,// the duration of the animation while scrolling to a chart
-
-    ms_penalty: 0,                  // the time penalty of the next alarm
-    ms_between_notifications: 500,  // firefox moves the alarms off-screen (above, outside the top of the screen)
-                                    // if alarms are shown faster than: one per 500ms
-
-    update_every: 10000,            // the time in ms between alarm checks
-
-    notifications: false,           // when true, the browser supports notifications (may not be granted though)
-    last_notification_id: 0,        // the id of the last alarm_log we have raised an alarm for
-    first_notification_id: 0,       // the id of the first alarm_log entry for this session
-                                    // this is used to prevent CLEAR notifications for past events
-    // notifications_shown: [],
-
-    server: null,                   // the server to connect to for fetching alarms
-    current: null,                  // the list of raised alarms - updated in the background
-
-    // a callback function to call every time the list of raised alarms is refreshed
-    callback: (typeof netdataAlarmsActiveCallback === 'function') ? netdataAlarmsActiveCallback : null,
-
-    // a callback function to call every time a notification is shown
-    // the return value is used to decide if the notification will be shown
-    notificationCallback: (typeof netdataAlarmsNotifCallback === 'function') ? netdataAlarmsNotifCallback : null,
-
-    recipients: null,               // the list (array) of recipients to show alarms for, or null
-
-    recipientMatches: function (to_string, wanted_array) {
-        if (typeof wanted_array === 'undefined' || wanted_array === null || Array.isArray(wanted_array) === false) {
-            return true;
-        }
-
-        let r = ' ' + to_string.toString() + ' ';
-        let len = wanted_array.length;
-        while (len--) {
-            if (r.indexOf(' ' + wanted_array[len] + ' ') >= 0) {
-                return true;
-            }
-        }
-
-        return false;
-    },
-
-    activeForRecipients: function () {
-        let active = {};
-        let data = NETDATA.alarms.current;
-
-        if (typeof data === 'undefined' || data === null) {
-            return active;
-        }
-
-        for (let x in data.alarms) {
-            if (!data.alarms.hasOwnProperty(x)) {
-                continue;
-            }
-
-            let alarm = data.alarms[x];
-            if ((alarm.status === 'WARNING' || alarm.status === 'CRITICAL') && NETDATA.alarms.recipientMatches(alarm.recipient, NETDATA.alarms.recipients)) {
-                active[x] = alarm;
-            }
-        }
-
-        return active;
-    },
-
-    notify: function (entry) {
-        // console.log('alarm ' + entry.unique_id);
-
-        if (entry.updated) {
-            // console.log('alarm ' + entry.unique_id + ' has been updated by another alarm');
-            return;
-        }
-
-        let value_string = entry.value_string;
-
-        if (NETDATA.alarms.current !== null) {
-            // get the current value_string
-            let t = NETDATA.alarms.current.alarms[entry.chart + '.' + entry.name];
-            if (typeof t !== 'undefined' && entry.status === t.status && typeof t.value_string !== 'undefined') {
-                value_string = t.value_string;
-            }
-        }
-
-        let name = entry.name.replace(/_/g, ' ');
-        let status = entry.status.toLowerCase();
-        let title = name + ' = ' + value_string.toString();
-        let tag = entry.alarm_id;
-        let icon = 'images/banner-icon-144x144.png';
-        let interaction = false;
-        let data = entry;
-        let show = true;
-
-        // console.log('alarm ' + entry.unique_id + ' ' + entry.chart + '.' + entry.name + ' is ' +  entry.status);
-
-        switch (entry.status) {
-            case 'REMOVED':
-                show = false;
-                break;
-
-            case 'UNDEFINED':
-                return;
-
-            case 'UNINITIALIZED':
-                return;
-
-            case 'CLEAR':
-                if (entry.unique_id < NETDATA.alarms.first_notification_id) {
-                    // console.log('alarm ' + entry.unique_id + ' is not current');
-                    return;
-                }
-                if (entry.old_status === 'UNINITIALIZED' || entry.old_status === 'UNDEFINED') {
-                    // console.log('alarm' + entry.unique_id + ' switch to CLEAR from ' + entry.old_status);
-                    return;
-                }
-                if (entry.no_clear_notification) {
-                    // console.log('alarm' + entry.unique_id + ' is CLEAR but has no_clear_notification flag');
-                    return;
-                }
-                title = name + ' back to normal (' + value_string.toString() + ')';
-                icon = 'images/check-mark-2-128-green.png';
-                interaction = false;
-                break;
-
-            case 'WARNING':
-                if (entry.old_status === 'CRITICAL') {
-                    status = 'demoted to ' + entry.status.toLowerCase();
-                }
-
-                icon = 'images/alert-128-orange.png';
-                interaction = false;
-                break;
-
-            case 'CRITICAL':
-                if (entry.old_status === 'WARNING') {
-                    status = 'escalated to ' + entry.status.toLowerCase();
-                }
-
-                icon = 'images/alert-128-red.png';
-                interaction = true;
-                break;
-
-            default:
-                console.log('invalid alarm status ' + entry.status);
-                return;
-        }
-
-        // filter recipients
-        if (show) {
-            show = NETDATA.alarms.recipientMatches(entry.recipient, NETDATA.alarms.recipients);
-        }
-
-        /*
-        // cleanup old notifications with the same alarm_id as this one
-        // it does not seem to work on any web browser - so notifications cannot be removed
-
-        let len = NETDATA.alarms.notifications_shown.length;
-        while (len--) {
-            let n = NETDATA.alarms.notifications_shown[len];
-            if (n.data.alarm_id === entry.alarm_id) {
-                console.log('removing old alarm ' + n.data.unique_id);
-
-                // close the notification
-                n.close.bind(n);
-
-                // remove it from the array
-                NETDATA.alarms.notifications_shown.splice(len, 1);
-                len = NETDATA.alarms.notifications_shown.length;
-            }
-        }
-        */
-
-        if (show) {
-            if (typeof NETDATA.alarms.notificationCallback === 'function') {
-                show = NETDATA.alarms.notificationCallback(entry);
-            }
-
-            if (show) {
-                setTimeout(function () {
-                    // show this notification
-                    // console.log('new notification: ' + title);
-                    let n = new Notification(title, {
-                        body: entry.hostname + ' - ' + entry.chart + ' (' + entry.family + ') - ' + status + ': ' + entry.info,
-                        tag: tag,
-                        requireInteraction: interaction,
-                        icon: NETDATA.serverStatic + icon,
-                        data: data
-                    });
-
-                    n.onclick = function (event) {
-                        event.preventDefault();
-                        NETDATA.alarms.onclick(event.target.data);
-                    };
-
-                    // console.log(n);
-                    // NETDATA.alarms.notifications_shown.push(n);
-                    // console.log(entry);
-                }, NETDATA.alarms.ms_penalty);
-
-                NETDATA.alarms.ms_penalty += NETDATA.alarms.ms_between_notifications;
-            }
-        }
-    },
-
-    scrollToChart: function (chart_id) {
-        if (typeof chart_id === 'string') {
-            let offset = $('#' + NETDATA.alarms.chart_div_id_prefix + NETDATA.name2id(chart_id)).offset();
-            if (typeof offset !== 'undefined') {
-                $('html, body').animate({scrollTop: offset.top + NETDATA.alarms.chart_div_offset}, NETDATA.alarms.chart_div_animation_duration);
-                return true;
-            }
-        }
-        return false;
-    },
-
-    scrollToAlarm: function (alarm) {
-        if (typeof alarm === 'object') {
-            let ret = NETDATA.alarms.scrollToChart(alarm.chart);
-
-            if (ret && NETDATA.options.page_is_visible === false) {
-                window.focus();
-            }
-            //    alert('netdata dashboard will now scroll to chart: ' + alarm.chart + '\n\nThis alarm opened to bring the browser window in front of the screen. Click on the dashboard to prevent it from appearing again.');
-        }
-
-    },
-
-    notifyAll: function () {
-        // console.log('FETCHING ALARM LOG');
-        NETDATA.alarms.get_log(NETDATA.alarms.last_notification_id, function (data) {
-            // console.log('ALARM LOG FETCHED');
-
-            if (data === null || typeof data !== 'object') {
-                console.log('invalid alarms log response');
-                return;
-            }
-
-            if (data.length === 0) {
-                console.log('received empty alarm log');
-                return;
-            }
-
-            // console.log('received alarm log of ' + data.length + ' entries, from ' + data[data.length - 1].unique_id.toString() + ' to ' + data[0].unique_id.toString());
-
-            data.sort(function (a, b) {
-                if (a.unique_id > b.unique_id) {
-                    return -1;
-                }
-                if (a.unique_id < b.unique_id) {
-                    return 1;
-                }
-                return 0;
-            });
-
-            NETDATA.alarms.ms_penalty = 0;
-
-            let len = data.length;
-            while (len--) {
-                if (data[len].unique_id > NETDATA.alarms.last_notification_id) {
-                    NETDATA.alarms.notify(data[len]);
-                }
-                //else
-                //    console.log('ignoring alarm (older) with id ' + data[len].unique_id.toString());
-            }
-
-            NETDATA.alarms.last_notification_id = data[0].unique_id;
-
-            if (typeof netdataAlarmsRemember === 'undefined' || netdataAlarmsRemember) {
-                NETDATA.localStorageSet('last_notification_id', NETDATA.alarms.last_notification_id, null);
-            }
-            // console.log('last notification id = ' + NETDATA.alarms.last_notification_id);
-        })
-    },
-
-    check_notifications: function () {
-        // returns true if we should fire 1+ notifications
-
-        if (NETDATA.alarms.notifications !== true) {
-            // console.log('web notifications are not available');
-            return false;
-        }
-
-        if (Notification.permission !== 'granted') {
-            // console.log('web notifications are not granted');
-            return false;
-        }
-
-        if (typeof NETDATA.alarms.current !== 'undefined' && typeof NETDATA.alarms.current.alarms === 'object') {
-            // console.log('can do alarms: old id = ' + NETDATA.alarms.last_notification_id + ' new id = ' + NETDATA.alarms.current.latest_alarm_log_unique_id);
-
-            if (NETDATA.alarms.current.latest_alarm_log_unique_id > NETDATA.alarms.last_notification_id) {
-                // console.log('new alarms detected');
-                return true;
-            }
-            //else console.log('no new alarms');
-        }
-        // else console.log('cannot process alarms');
-
-        return false;
-    },
-
-    get: function (what, callback) {
-        $.ajax({
-            url: NETDATA.alarms.server + '/api/v1/alarms?' + what.toString(),
-            async: true,
-            cache: false,
-            headers: {
-                'Cache-Control': 'no-cache, no-store',
-                'Pragma': 'no-cache'
-            },
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function (data) {
-                data = NETDATA.xss.checkOptional('/api/v1/alarms', data /*, '.*\.(calc|calc_parsed|warn|warn_parsed|crit|crit_parsed)$' */);
-
-                if (NETDATA.alarms.first_notification_id === 0 && typeof data.latest_alarm_log_unique_id === 'number') {
-                    NETDATA.alarms.first_notification_id = data.latest_alarm_log_unique_id;
-                }
-
-                if (typeof callback === 'function') {
-                    return callback(data);
-                }
-            })
-            .fail(function () {
-                NETDATA.error(415, NETDATA.alarms.server);
-
-                if (typeof callback === 'function') {
-                    return callback(null);
-                }
-            });
-    },
-
-    update_forever: function () {
-        if (netdataShowAlarms !== true || netdataSnapshotData !== null) {
-            return;
-        }
-
-        NETDATA.alarms.get('active', function (data) {
-            if (data !== null) {
-                NETDATA.alarms.current = data;
-
-                if (NETDATA.alarms.check_notifications()) {
-                    NETDATA.alarms.notifyAll();
-                }
-
-                if (typeof NETDATA.alarms.callback === 'function') {
-                    NETDATA.alarms.callback(data);
-                }
-
-                // Health monitoring is disabled on this netdata
-                if (data.status === false) {
-                    return;
-                }
-            }
-
-            setTimeout(NETDATA.alarms.update_forever, NETDATA.alarms.update_every);
-        });
-    },
-
-    get_log: function (last_id, callback) {
-        // console.log('fetching all log after ' + last_id.toString());
-        $.ajax({
-            url: NETDATA.alarms.server + '/api/v1/alarm_log?after=' + last_id.toString(),
-            async: true,
-            cache: false,
-            headers: {
-                'Cache-Control': 'no-cache, no-store',
-                'Pragma': 'no-cache'
-            },
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function (data) {
-                data = NETDATA.xss.checkOptional('/api/v1/alarm_log', data);
-
-                if (typeof callback === 'function') {
-                    return callback(data);
-                }
-            })
-            .fail(function () {
-                NETDATA.error(416, NETDATA.alarms.server);
-
-                if (typeof callback === 'function') {
-                    return callback(null);
-                }
-            });
-    },
-
-    init: function () {
-        NETDATA.alarms.server = NETDATA.fixHost(NETDATA.serverDefault);
-
-        if (typeof netdataAlarmsRemember === 'undefined' || netdataAlarmsRemember) {
-            NETDATA.alarms.last_notification_id =
-                NETDATA.localStorageGet('last_notification_id', NETDATA.alarms.last_notification_id, null);
-        }
-
-        if (NETDATA.alarms.onclick === null) {
-            NETDATA.alarms.onclick = NETDATA.alarms.scrollToAlarm;
-        }
-
-        if (typeof netdataAlarmsRecipients !== 'undefined' && Array.isArray(netdataAlarmsRecipients)) {
-            NETDATA.alarms.recipients = netdataAlarmsRecipients;
-        }
-
-        if (netdataShowAlarms) {
-            NETDATA.alarms.update_forever();
-
-            if ('Notification' in window) {
-                // console.log('notifications available');
-                NETDATA.alarms.notifications = true;
-
-                if (Notification.permission === 'default') {
-                    Notification.requestPermission();
-                }
-            }
-        }
-    }
-};
-
-// Registry of netdata hosts
-
-NETDATA.registry = {
-    server: null,         // the netdata registry server
-    isCloudEnabled: false,// is netdata.cloud functionality enabled?
-    cloudBaseURL: null,   // the netdata cloud base url
-    person_guid: null,    // the unique ID of this browser / user
-    machine_guid: null,   // the unique ID the netdata server that served dashboard.js
-    hostname: 'unknown',  // the hostname of the netdata server that served dashboard.js
-    machines: null,       // the user's other URLs
-    machines_array: null, // the user's other URLs in an array
-    person_urls: null,
-    anonymous_statistics_checked: false,
-    MASKED_DATA: "***",
-
-    isUsingGlobalRegistry: function() {
-        return NETDATA.registry.server == "https://registry.my-netdata.io";
-    },
-
-    isRegistryEnabled: function() {
-        return !(NETDATA.registry.isUsingGlobalRegistry() || isSignedIn())
-    },
-
-    parsePersonUrls: function (person_urls) {
-        NETDATA.registry.person_urls = person_urls;
-
-        if (person_urls) {
-            NETDATA.registry.machines = {};
-            NETDATA.registry.machines_array = [];
-
-            let apu = person_urls;
-            let i = apu.length;
-            while (i--) {
-                if (typeof NETDATA.registry.machines[apu[i][0]] === 'undefined') {
-                    // console.log('adding: ' + apu[i][4] + ', ' + ((now - apu[i][2]) / 1000).toString());
-
-                    let obj = {
-                        guid: apu[i][0],
-                        url: apu[i][1],
-                        last_t: apu[i][2],
-                        accesses: apu[i][3],
-                        name: apu[i][4],
-                        alternate_urls: []
-                    };
-                    obj.alternate_urls.push(apu[i][1]);
-
-                    NETDATA.registry.machines[apu[i][0]] = obj;
-                    NETDATA.registry.machines_array.push(obj);
-                } else {
-                    // console.log('appending: ' + apu[i][4] + ', ' + ((now - apu[i][2]) / 1000).toString());
-
-                    let pu = NETDATA.registry.machines[apu[i][0]];
-                    if (pu.last_t < apu[i][2]) {
-                        pu.url = apu[i][1];
-                        pu.last_t = apu[i][2];
-                        pu.name = apu[i][4];
-                    }
-                    pu.accesses += apu[i][3];
-                    pu.alternate_urls.push(apu[i][1]);
-                }
-            }
-        }
-
-        if (typeof netdataRegistryCallback === 'function') {
-            netdataRegistryCallback(NETDATA.registry.machines_array);
-        }
-    },
-
-    init: function () {
-        if (netdataRegistry !== true) {
-            return;
-        }
-
-        NETDATA.registry.hello(NETDATA.serverDefault, function (data) {
-            if (data) {
-                NETDATA.registry.server = data.registry;
-                if (data.cloud_base_url !== "") {
-                    NETDATA.registry.isCloudEnabled = true;
-                    NETDATA.registry.cloudBaseURL = data.cloud_base_url;
-                } else {
-                    NETDATA.registry.isCloudEnabled = false;
-                    NETDATA.registry.cloudBaseURL = "";
-                }
-                NETDATA.registry.machine_guid = data.machine_guid;
-                NETDATA.registry.hostname = data.hostname;
-                if (!NETDATA.registry.anonymous_statistics_checked) {
-                    NETDATA.registry.anonymous_statistics_checked=true;
-                    if (data.anonymous_statistics) {
-                        (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
-                                new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
-                            j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=false;j.src=
-                            'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
-                        })(window,document,'script','dataLayer','GTM-N6CBMJD');
-                        dataLayer.push({"anonymous_statistics" : "true", "machine_guid" : data.machine_guid});
-                    }
-                }
-                NETDATA.registry.access(2, function (person_urls) {
-                    NETDATA.registry.parsePersonUrls(person_urls);
-                });    
-            }
-        });
-    },
-
-    hello: function (host, callback) {
-        host = NETDATA.fixHost(host);
-
-        // send HELLO to a netdata server:
-        // 1. verifies the server is reachable
-        // 2. responds with the registry URL, the machine GUID of this netdata server and its hostname
-        $.ajax({
-            url: host + '/api/v1/registry?action=hello',
-            async: true,
-            cache: false,
-            headers: {
-                'Cache-Control': 'no-cache, no-store',
-                'Pragma': 'no-cache'
-            },
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function (data) {
-                data = NETDATA.xss.checkOptional('/api/v1/registry?action=hello', data);
-
-                if (typeof data.status !== 'string' || data.status !== 'ok') {
-                    NETDATA.error(408, host + ' response: ' + JSON.stringify(data));
-                    data = null;
-                }
-
-                if (typeof callback === 'function') {
-                    return callback(data);
-                }
-            })
-            .fail(function () {
-                NETDATA.error(407, host);
-
-                if (typeof callback === 'function') {
-                    return callback(null);
-                }
-            });
-    },
-
-    access: function (max_redirects, callback) {
-        let name = NETDATA.registry.MASKED_DATA;
-        let url = NETDATA.registry.MASKED_DATA;
-
-        if (!NETDATA.registry.isUsingGlobalRegistry()) {
-            // If the user is using a private registry keep sending identifiable
-            // data.
-            name = NETDATA.registry.hostname;
-            url = NETDATA.serverDefault;
-        } 
-
-        console.log("ACCESS", name, url);
-
-        // send ACCESS to a netdata registry:
-        // 1. it lets it know we are accessing a netdata server (its machine GUID and its URL)
-        // 2. it responds with a list of netdata servers we know
-        // the registry identifies us using a cookie it sets the first time we access it
-        // the registry may respond with a redirect URL to send us to another registry
-        $.ajax({
-            url: NETDATA.registry.server + '/api/v1/registry?action=access&machine=' + NETDATA.registry.machine_guid + '&name=' + encodeURIComponent(name) + '&url=' + encodeURIComponent(url), // + '&visible_url=' + encodeURIComponent(document.location),
-            async: true,
-            cache: false,
-            headers: {
-                'Cache-Control': 'no-cache, no-store',
-                'Pragma': 'no-cache'
-            },
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function (data) {
-                data = NETDATA.xss.checkAlways('/api/v1/registry?action=access', data);
-
-                let redirect = null;
-                if (typeof data.registry === 'string') {
-                    redirect = data.registry;
-                }
-
-                if (typeof data.status !== 'string' || data.status !== 'ok') {
-                    NETDATA.error(409, NETDATA.registry.server + ' responded with: ' + JSON.stringify(data));
-                    data = null;
-                }
-
-                if (data === null) {
-                    if (redirect !== null && max_redirects > 0) {
-                        NETDATA.registry.server = redirect;
-                        NETDATA.registry.access(max_redirects - 1, callback);
-                    }
-                    else {
-                        if (typeof callback === 'function') {
-                            return callback(null);
-                        }
-                    }
-                } else {
-                    if (typeof data.person_guid === 'string') {
-                        NETDATA.registry.person_guid = data.person_guid;
-                    }
-
-                    if (typeof callback === 'function') {
-                        const urls = data.urls.filter((u) => u[1] !== NETDATA.registry.MASKED_DATA);
-                        return callback(urls);
-                    }
-                }
-            })
-            .fail(function () {
-                NETDATA.error(410, NETDATA.registry.server);
-
-                if (typeof callback === 'function') {
-                    return callback(null);
-                }
-            });
-    },
-
-    delete: function (delete_url, callback) {
-        // send DELETE to a netdata registry:
-        $.ajax({
-            url: NETDATA.registry.server + '/api/v1/registry?action=delete&machine=' + NETDATA.registry.machine_guid + '&name=' + encodeURIComponent(NETDATA.registry.hostname) + '&url=' + encodeURIComponent(NETDATA.serverDefault) + '&delete_url=' + encodeURIComponent(delete_url),
-            async: true,
-            cache: false,
-            headers: {
-                'Cache-Control': 'no-cache, no-store',
-                'Pragma': 'no-cache'
-            },
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function (data) {
-                data = NETDATA.xss.checkAlways('/api/v1/registry?action=delete', data);
-
-                if (typeof data.status !== 'string' || data.status !== 'ok') {
-                    NETDATA.error(411, NETDATA.registry.server + ' responded with: ' + JSON.stringify(data));
-                    data = null;
-                }
-
-                if (typeof callback === 'function') {
-                    return callback(data);
-                }
-            })
-            .fail(function () {
-                NETDATA.error(412, NETDATA.registry.server);
-
-                if (typeof callback === 'function') {
-                    return callback(null);
-                }
-            });
-    },
-
-    search: function (machine_guid, callback) {
-        // SEARCH for the URLs of a machine:
-        $.ajax({
-            url: NETDATA.registry.server + '/api/v1/registry?action=search&machine=' + NETDATA.registry.machine_guid + '&name=' + encodeURIComponent(NETDATA.registry.hostname) + '&url=' + encodeURIComponent(NETDATA.serverDefault) + '&for=' + machine_guid,
-            async: true,
-            cache: false,
-            headers: {
-                'Cache-Control': 'no-cache, no-store',
-                'Pragma': 'no-cache'
-            },
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function (data) {
-                data = NETDATA.xss.checkAlways('/api/v1/registry?action=search', data);
-
-                if (typeof data.status !== 'string' || data.status !== 'ok') {
-                    NETDATA.error(417, NETDATA.registry.server + ' responded with: ' + JSON.stringify(data));
-                    data = null;
-                }
-
-                if (typeof callback === 'function') {
-                    return callback(data);
-                }
-            })
-            .fail(function () {
-                NETDATA.error(418, NETDATA.registry.server);
-
-                if (typeof callback === 'function') {
-                    return callback(null);
-                }
-            });
-    },
-
-    switch: function (new_person_guid, callback) {
-        // impersonate
-        $.ajax({
-            url: NETDATA.registry.server + '/api/v1/registry?action=switch&machine=' + NETDATA.registry.machine_guid + '&name=' + encodeURIComponent(NETDATA.registry.hostname) + '&url=' + encodeURIComponent(NETDATA.serverDefault) + '&to=' + new_person_guid,
-            async: true,
-            cache: false,
-            headers: {
-                'Cache-Control': 'no-cache, no-store',
-                'Pragma': 'no-cache'
-            },
-            xhrFields: {withCredentials: true} // required for the cookie
-        })
-            .done(function (data) {
-                data = NETDATA.xss.checkAlways('/api/v1/registry?action=switch', data);
-
-                if (typeof data.status !== 'string' || data.status !== 'ok') {
-                    NETDATA.error(413, NETDATA.registry.server + ' responded with: ' + JSON.stringify(data));
-                    data = null;
-                }
-
-                if (typeof callback === 'function') {
-                    return callback(data);
-                }
-            })
-            .fail(function () {
-                NETDATA.error(414, NETDATA.registry.server);
-
-                if (typeof callback === 'function') {
-                    return callback(null);
-                }
-            });
-    }
-};
-
-// Load required JS libraries and CSS
-
-NETDATA.requiredJs = [
-    {
-        url: NETDATA.serverStatic + 'lib/bootstrap-3.3.7.min.js',
-        async: false,
-        isAlreadyLoaded: function () {
-            // check if bootstrap is loaded
-            if (typeof $().emulateTransitionEnd === 'function') {
-                return true;
-            } else {
-                return typeof netdataNoBootstrap !== 'undefined' && netdataNoBootstrap;
-            }
-        }
-    },
-    {
-        url: NETDATA.serverStatic + 'lib/fontawesome-all-5.0.1.min.js',
-        async: true,
-        isAlreadyLoaded: function () {
-            return typeof netdataNoFontAwesome !== 'undefined' && netdataNoFontAwesome;
-        }
-    },
-    {
-        url: NETDATA.serverStatic + 'lib/perfect-scrollbar-0.6.15.min.js',
-        isAlreadyLoaded: function () {
-            return false;
-        }
-    }
-];
-
-NETDATA.requiredCSS = [
-    {
-        url: NETDATA.themes.current.bootstrap_css,
-        isAlreadyLoaded: function () {
-            return typeof netdataNoBootstrap !== 'undefined' && netdataNoBootstrap;
-        }
-    },
-    {
-        url: NETDATA.themes.current.dashboard_css,
-        isAlreadyLoaded: function () {
-            return false;
-        }
-    }
-];
-
-NETDATA.loadedRequiredJs = 0;
-NETDATA.loadRequiredJs = function (index, callback) {
-    if (index >= NETDATA.requiredJs.length) {
-        if (typeof callback === 'function') {
-            return callback();
-        }
-        return;
-    }
-
-    if (NETDATA.requiredJs[index].isAlreadyLoaded()) {
-        NETDATA.loadedRequiredJs++;
-        NETDATA.loadRequiredJs(++index, callback);
-        return;
-    }
-
-    if (NETDATA.options.debug.main_loop) {
-        console.log('loading ' + NETDATA.requiredJs[index].url);
-    }
-
-    let async = true;
-    if (typeof NETDATA.requiredJs[index].async !== 'undefined' && NETDATA.requiredJs[index].async === false) {
-        async = false;
-    }
-
-    $.ajax({
-        url: NETDATA.requiredJs[index].url,
-        cache: true,
-        dataType: "script",
-        xhrFields: {withCredentials: true} // required for the cookie
-    })
-        .done(function () {
-            if (NETDATA.options.debug.main_loop) {
-                console.log('loaded ' + NETDATA.requiredJs[index].url);
-            }
-        })
-        .fail(function () {
-            alert('Cannot load required JS library: ' + NETDATA.requiredJs[index].url);
-        })
-        .always(function () {
-            NETDATA.loadedRequiredJs++;
-
-            // if (async === false)
-            if (!async) {
-                NETDATA.loadRequiredJs(++index, callback);
-            }
-        });
-
-    // if (async === true)
-    if (async) {
-        NETDATA.loadRequiredJs(++index, callback);
-    }
-};
-
-NETDATA.loadRequiredCSS = function (index) {
-    if (index >= NETDATA.requiredCSS.length) {
-        return;
-    }
-
-    if (NETDATA.requiredCSS[index].isAlreadyLoaded()) {
-        NETDATA.loadRequiredCSS(++index);
-        return;
-    }
-
-    if (NETDATA.options.debug.main_loop) {
-        console.log('loading ' + NETDATA.requiredCSS[index].url);
-    }
-
-    NETDATA._loadCSS(NETDATA.requiredCSS[index].url);
-    NETDATA.loadRequiredCSS(++index);
-};
-
-// Boot it!
-
-if (typeof netdataPrepCallback === 'function') {
-    netdataPrepCallback();
-}
-
-NETDATA.errorReset();
-NETDATA.loadRequiredCSS(0);
-
-NETDATA._loadjQuery(function () {
-    NETDATA.loadRequiredJs(0, function () {
-        if (typeof $().emulateTransitionEnd !== 'function') {
-            // bootstrap is not available
-            NETDATA.options.current.show_help = false;
-        }
-
-        if (typeof netdataDontStart === 'undefined' || !netdataDontStart) {
-            if (NETDATA.options.debug.main_loop) {
-                console.log('starting chart refresh thread');
-            }
-
-            NETDATA.start();
-        }
-    });
-});
-})(window, document, (typeof jQuery === 'function')?jQuery:undefined);