-
Notifications
You must be signed in to change notification settings - Fork 0
/
non-composed-bubbling-events.html
59 lines (53 loc) · 1.54 KB
/
non-composed-bubbling-events.html
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
<!DOCTYPE html>
<html>
<head>
<title>Event Propagation (bubbles: true, composed: false)</title>
<meta name="author" title="Eugene Kashida" href="mailto:[email protected]">
</head>
<body>
<script>
class MyCustomElement extends HTMLElement {
constructor() {
super();
this._shadowRoot = this.attachShadow({ mode: 'open' });
}
connectedCallback() {
this._shadowRoot.innerHTML = `
<div>
<span></span>
</div>
`;
const span = this._shadowRoot.querySelector('span');
const div = this._shadowRoot.querySelector('div');
const logs = [];
[
span,
div,
this._shadowRoot,
this._shadowRoot.host,
document,
].forEach((elm) => {
elm.addEventListener('foo', (event) => {
logs.push([event.currentTarget, event.target, event.composedPath()]);
});
});
span.dispatchEvent(
new CustomEvent('foo', {
bubbles: true,
composed: false
})
);
// [
// [span, span, [span, div, document-fragment]]
// [div, span, [span, div, document-fragment]]
// [document-fragment, span, [span, div, document-fragment]]
// ]
console.log(logs);
}
}
customElements.define('my-custom-element', MyCustomElement);
var instance = document.createElement('my-custom-element');
document.body.appendChild(instance);
</script>
</body>
</html>