​x
 
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
/* Safari 语法 */
:-webkit-full-screen {
  background-color: yellow;
}
​
/* IE11 语法 */
:-ms-fullscreen {
  background-color: yellow;
}
​
/* Standard 语法 */
:fullscreen {
  background-color: yellow;
}
​
/* 设置按钮的样式 */
button {
  padding: 20px;
  font-size: 20px;
}
</style>
</head>
<body>
​
<h1>全屏模式</h1>
<p>单击“打开全屏模式”按钮以全屏模式打开此页面。通过单击键盘上的“Esc”键或使用“关闭全屏模式”按钮将其关闭。</p>
​
<button onclick="openFullscreen();">打开全屏模式</button>
<button onclick="closeFullscreen();">关闭全屏模式</button>
​
<script>
// 使用 JavaScript 在全屏模式中打开页面
var elem = document.documentElement;
function openFullscreen() {
  if (elem.requestFullscreen) {
    elem.requestFullscreen();
  } else if (elem.webkitRequestFullscreen) { /* Safari */
    elem.webkitRequestFullscreen();
  } else if (elem.msRequestFullscreen) { /* IE11 */
    elem.msRequestFullscreen();
  }
}
​
function closeFullscreen() {
  if (document.exitFullscreen) {
    document.exitFullscreen();
  } else if (document.webkitExitFullscreen) { /* Safari */
    document.webkitExitFullscreen();
  } else if (document.msExitFullscreen) { /* IE11 */
    document.msExitFullscreen();
  }
}
</script>
​
<p>注释：Internet Explorer 10 以及更早的版本不支持全面模式。</p>
​
</body>
</html>
​