1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*******************************************************************************
uBlock Origin - a comprehensive, efficient content blocker
Copyright (C) 2014-present Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/* jshint esversion:11 */
'use strict';
/******************************************************************************/
const normalizeTarget = target => {
if ( typeof target === 'string' ) { return Array.from(qsa$(target)); }
if ( target instanceof Element ) { return [ target ]; }
if ( target === null ) { return []; }
if ( Array.isArray(target) ) { return target; }
return Array.from(target);
};
const makeEventHandler = (selector, callback) => {
return function(event) {
const dispatcher = event.currentTarget;
if (
dispatcher instanceof HTMLElement === false ||
typeof dispatcher.querySelectorAll !== 'function'
) {
return;
}
const receiver = event.target;
const ancestor = receiver.closest(selector);
if (
ancestor === receiver &&
ancestor !== dispatcher &&
dispatcher.contains(ancestor)
) {
callback.call(receiver, event);
}
};
};
/******************************************************************************/
class dom {
static attr(target, attr, value = undefined) {
for ( const elem of normalizeTarget(target) ) {
if ( value === undefined ) {
return elem.getAttribute(attr);
}
if ( value === null ) {
elem.removeAttribute(attr);
} else {
elem.setAttribute(attr, value);
}
}
}
static clear(target) {
for ( const elem of normalizeTarget(target) ) {
while ( elem.firstChild !== null ) {
elem.removeChild(elem.firstChild);
}
}
}
static clone(target) {
const elements = normalizeTarget(target);
if ( elements.length === 0 ) { return null; }
return elements[0].cloneNode(true);
}
static create(a) {
if ( typeof a === 'string' ) {
return document.createElement(a);
}
}
static prop(target, prop, value = undefined) {
for ( const elem of normalizeTarget(target) ) {
if ( value === undefined ) { return elem[prop]; }
elem[prop] = value;
}
}
static text(target, text) {
const targets = normalizeTarget(target);
if ( text === undefined ) {
return targets.length !== 0 ? targets[0].textContent : undefined;
}
for ( const elem of targets ) {
elem.textContent = text;
}
}
static remove(target) {
for ( const elem of normalizeTarget(target) ) {
elem.remove();
}
}
// target, type, callback, [options]
// target, type, subtarget, callback, [options]
static on(target, type, subtarget, callback, options) {
if ( typeof subtarget === 'function' ) {
options = callback;
callback = subtarget;
subtarget = undefined;
if ( typeof options === 'boolean' ) {
options = { capture: true };
}
} else {
callback = makeEventHandler(subtarget, callback);
if ( options === undefined || typeof options === 'boolean' ) {
options = { capture: true };
} else {
options.capture = true;
}
}
const targets = target instanceof Window || target instanceof Document
? [ target ]
: normalizeTarget(target);
for ( const elem of targets ) {
elem.addEventListener(type, callback, options);
}
}
static off(target, type, callback, options) {
if ( typeof callback !== 'function' ) { return; }
if ( typeof options === 'boolean' ) {
options = { capture: true };
}
const targets = target instanceof Window || target instanceof Document
? [ target ]
: normalizeTarget(target);
for ( const elem of targets ) {
elem.removeEventListener(type, callback, options);
}
}
}
dom.cl = class {
static add(target, name) {
for ( const elem of normalizeTarget(target) ) {
elem.classList.add(name);
}
}
static remove(target, ...names) {
for ( const elem of normalizeTarget(target) ) {
elem.classList.remove(...names);
}
}
static toggle(target, name, state) {
let r;
for ( const elem of normalizeTarget(target) ) {
r = elem.classList.toggle(name, state);
}
return r;
}
static has(target, name) {
for ( const elem of normalizeTarget(target) ) {
if ( elem.classList.contains(name) ) {
return true;
}
}
return false;
}
};
/******************************************************************************/
function qs$(a, b) {
if ( typeof a === 'string') {
return document.querySelector(a);
}
if ( a === null ) { return null; }
return a.querySelector(b);
}
function qsa$(a, b) {
if ( typeof a === 'string') {
return document.querySelectorAll(a);
}
if ( a === null ) { return []; }
return a.querySelectorAll(b);
}
dom.root = qs$(':root');
dom.html = document.documentElement;
dom.head = document.head;
dom.body = document.body;
/******************************************************************************/
export { dom, qs$, qsa$ };
|
