JavaScript 实现浏览器全屏与退出全屏详解及代码示例

<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>js全屏和退出全屏代码</title>
<body>
<!-- requestFullScreen(document.documentElement): 整个网页进入全屏
  requestFullScreen(document.getElementById("video-box")): 指定某块区域全屏
 -->
<button onclick="requestFullScreen(document.documentElement)">全屏显示</button>
<button onclick="exitFull()">退出全屏</button>
</body>
<script type="text/javascript">
function requestFullScreen(element) {
 // 判断各种浏览器，找到正确的方法
 var requestMethod = element.requestFullScreen || //W3C
 element.webkitRequestFullScreen || //Chrome等
 element.mozRequestFullScreen || //FireFox
 element.msRequestFullScreen; //IE11
 if (requestMethod) {
  requestMethod.call(element);
 }
 else if (typeof window.ActiveXObject !== "undefined") {//for Internet Explorer
  var wscript = new ActiveXObject("WScript.Shell");
  if (wscript !== null) {
   wscript.SendKeys("{F11}");
  }
 }
}

function exitFull() {
 // 判断各种浏览器，找到正确的方法
 var exitMethod = document.exitFullscreen || //W3C
 document.mozCancelFullScreen || //Chrome等
 document.webkitExitFullscreen || //FireFox
 document.webkitExitFullscreen; //IE11
 if (exitMethod) {
  exitMethod.call(document);
 }
 else if (typeof window.ActiveXObject !== "undefined") {//for Internet Explorer
  var wscript = new ActiveXObject("WScript.Shell");
  if (wscript !== null) {
   wscript.SendKeys("{F11}");
  }
 }
}
</script>
</html>

var $fullScreen = document.getElementById("js-fullScreen");//按钮 
if ($fullScreen) { 
  $fullScreen.addEventListener("click", function () { 
    var docElm = document.documentElement; 
    if (docElm.requestFullscreen) { 
      docElm.requestFullscreen(); 
    } 
    else if (docElm.msRequestFullscreen) { 
      docElm.msRequestFullscreen(); 
    } 
    else if (docElm.mozRequestFullScreen) { 
      docElm.mozRequestFullScreen(); 
    } 
    else if (docElm.webkitRequestFullScreen) { 
      docElm.webkitRequestFullScreen(); 
    } 
  }, false); 
} 

var $cancelFullScreen = document.getElementById("js-cancelFullScreen"); 
if ($cancelFullScreen) { 
  $cancelFullScreen.addEventListener("click", function () { 
    if (document.exitFullscreen) { 
      document.exitFullscreen(); 
    } 
    else if (document.msExitFullscreen) { 
      document.msExitFullscreen(); 
    } 
    else if (document.mozCancelFullScreen) { 
      document.mozCancelFullScreen(); 
    } 
    else if (document.webkitCancelFullScreen) { 
      document.webkitCancelFullScreen(); 
    } 
  }, false); 
}