<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
html,
body {
padding: 0;
margin: 0;
100%;
height: 100%;
background: green;
}
</style>
</head>
<body>
<button id="btn">button</button>
<p id="">这是一个段落</p>
<script type="text/javascript">
var btn = document.querySelector('#btn');
btn.addEventListener('click', function(e) {
if (document.body.RequestFullscreen) {
document.body.RequestFullscreen();
} else if (document.body.webkitRequestFullscreen) {
document.body.webkitRequestFullscreen();
} else {
console.log('不支持')
}
// e.preventDefault()
})
</script>
</body>
</html>
点击按钮将会全屏，esc退出全屏