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<html>
<head></head>
<body></body>
<script>
window.addEventListener('DOMContentLoaded', () => {
const shadow = document.body.attachShadow({mode: 'open'});
shadow.append(document.createElement('div'));
const style = document.createElement('style');
style.textContent = `
div {
position: absolute;
top: 0;
left: 0;
width: 200px;
height: 100px;
background-color: red;
animation-name: z-spin;
animation-duration: 5s;
animation-iteration-count: infinite;
animation-timing-function: linear;
}
@keyframes z-spin {
0% { transform: rotateZ(0deg); }
100% { transform: rotateZ(360deg); }
}
`;
shadow.append(style);
}, false);
</script>
</html>