<body>
<div id="doc"></div>
<div id="model"></div>
<script>
let a = 0;
if ('orientation' in screen) {
document.getElementById('doc').textContent = `屏幕旋转了${a}次.`;
document.getElementById('model').textContent = `当前为${screen.orientation.type}模式！`;
screen.orientation.addEventListener('change', function () {// 监听屏幕的旋转
a++;
document.getElementById('doc').textContent = `屏幕旋转了${a}次.`;
if (screen.orientation.type.startsWith('landscape')) {
document.getElementById('model').textContent = `当前为横屏模式！`;
} else {
document.getElementById('model').textContent = `当前为纵向模式！`;
}
});
}
</script>
</body>
screen.orientation.lock 开发者主动切换 landscape 和 portrait 模式
对应的 screen.orientation.unlock();
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<html class="no-js">
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<html lang="zh-cmn-Hans">
<head>
<meta charset="utf-8">
<title>video 全屏体验</title>
<link rel="shortcut icon" type="image/ico" href="" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<!--移动端视图-->
<meta name="renderer" content="webkit" />
<meta name="keywords" content="ajanuw" />
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<meta name="description" content="ajanuw, b,c" />
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<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<meta http-equiv="Pragma" content="no-cache" />
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<meta http-equiv="Window-target" content="_top" />
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<meta http-equiv="content-Type" content="text/html;charset=utf-8" />
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<meta http-equiv="Content-Language" content="zh-cn" />
<!--显示语言的设定-->
<meta http-equiv="imagetoolbar" content="false" />
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<link rel="icon" sizes="192x192" href="https://pic.cnblogs.com/avatar/1053296/20171128213246.png" />
<link rel="apple-touch-icon" href="https://pic.cnblogs.com/avatar/1053296/20171128213246.png" />
<meta name="msapplication-square310x310logo" content="https://pic.cnblogs.com/avatar/1053296/20171128213246.png" />
<meta name="theme-color" content="#ff4081" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<!-- Chrome, Firefox OS and Opera -->
<link rel="apple-touch-startup-image" href="https://pic.cnblogs.com/avatar/1053296/20171128213246.png" />
<style>
.full-img {
max- 100%;
}
</style>
</head>
<body>
<!--[if lt IE 8]> <h3>请升级你的浏览器，或更换主浏览器！！!</h3> <![endif]-->
<img class="full-img" src="http://per.kelantu.com/photos/1515232896-FnIf9c57Hf1-l7DUdBwlXdN1bcLv-orij0?e=3153600000&token=CT86R8zZYVXDyHWEWFoMX4pz0ksOzxtKCaC80si4:HcaTgLGmJ6IbOt_d9ZGOQIqtv6g="
alt="">
<div class="doc"></div>
<script>
let img = document.querySelector('.full-img');
img.addEventListener('click', function (e) {
if (document.requestFullscreen) {
// 存在全屏 元素就退出全屏
document.exitFullscreen();
} else {
requestFullscreenImage();
lockScreenInLandscape();
}
}, false);
function requestFullscreenImage() {
if (img.requestFullscreen) {
img.requestFullscreen();
} else {
img.webkitRequestFullscreen();
}
}
function lockScreenInLandscape() {
if (!('orientation' in screen)) {
return;
}
// 判断当前 设备是 竖屏还是 横屏
// portrait 竖屏
// landscape 横屏
if (matchMedia('(orientation: portrait) and (max-device- 768px)').matches) {
// 竖屏就变 横屏
screen.orientation.lock('landscape').then(function () {
setTimeout(()=>{
screen.orientation.unlock();
// document.exitFullscreen();
document.webkitExitFullscreen()
}, 2000);
});
}
}
</script>
</body>
</html>