firstwebcomponent/test.html at master · anuj24sri/firstwebcomponent · GitHub

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
<!DOCTYPE html>
<html>
<head>
<title>Web Component</title>
</head>
<body>

<h1>Web Component</h1>
<my-app></my-app>
</body>
<script>

const template = document.createElement('template');
template.innerHTML = `
<style>
    :host {
    display: block;
    font-family: sans-serif;
    text-align: center;
    }

    span {

    cursor: pointer;
    }

    ul {
    list-style: none;
    padding: 0;
    }
</style>
<h1>My App</h1>

<input type="text" placeholder="Add a new to do"></input>
<span>&#9997;</span>

<ul id="todos"></ul>
`;

class MyApp extends HTMLElement {
    constructor() {
        super();
        this._shadowRoot = this.attachShadow({ 'mode': 'open' });
        this._shadowRoot.appendChild(template.content.cloneNode(true));
        this.$todoList = this._shadowRoot.querySelector('ul');
    }
}

window.customElements.define('my-app', MyApp);
</script>
</html>