blob: 469286a3992120157a90c3d058aade3ac56f6a45 (
plain)
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
|
// Recording events
const params = new URLSearchParams(window.location.search);
const uuid = params.get('uuid');
// The recorded events are stored in localStorage rather than global variables
// to catch events fired just before navigating out.
function getPushedItems(key) {
return JSON.parse(localStorage.getItem(key) || '[]');
}
function pushItem(key, value) {
const array = getPushedItems(key);
array.push(value);
localStorage.setItem(key, JSON.stringify(array));
}
window.recordEvent = function(eventName) {
pushItem(uuid + '.observedEvents', eventName);
}
window.getRecordedEvents = function() {
return getPushedItems(uuid + '.observedEvents');
}
// Records events fired on `window` and `document`, with names listed in
// `eventNames`.
function startRecordingEvents(eventNames) {
for (const eventName of eventNames) {
window.addEventListener(eventName, event => {
let result = eventName;
if (event.persisted) {
result += '.persisted';
}
if (eventName === 'visibilitychange') {
result += '.' + document.visibilityState;
}
recordEvent('window.' + result);
});
document.addEventListener(eventName, () => {
let result = eventName;
if (eventName === 'visibilitychange') {
result += '.' + document.visibilityState;
}
recordEvent('document.' + result);
});
}
}
// When a comma-separated list of event names are given as the `events`
// parameter in the URL, start record the events of the given names.
if (params.get('events')) {
startRecordingEvents(params.get('events').split(','));
}
|