一種最簡單的方式,就是動態改變你想要全屏顯示的部件的style,例如position變成absolute,height和width都設置成窗口大小,並且把背景顏色改成全白(為了遮住頁面上其余的元素)。這樣網頁上就只能看到你要突出的部件了,視覺上就等同於全屏。同時利用javascript監聽鍵盤事件,一旦用戶按了ESc退出鍵,就恢復原來的樣子。部分代碼如下:
復制代碼 代碼如下:
document.onkeydown = function (event) {
var e = event || window.event || arguments.callee.caller.arguments[0];
if (e && e.keyCode == 27) { //ESC鍵
$('.navbar-inner').fadeIn(100);
var maintable = document.getElementById("holder");
maintable.style.position = "relative";
maintable.style.height = "100%";
maintable.style.width = "100%";
maintable = document.getElementById("main");
maintable.style.height = "100%";
maintable.style.width = "100%";
maintable.style.left = 0 + "px";
maintable.style.top = 0 + "px";
resizePlots();
}
};
fullScreenClick: function () {
$('.navbar-inner').fadeOut(100);
var maintable = document.getElementById("holder");
maintable.style.position = "absolute";
maintable.style.background = "#fff";
//maintable.style.zIndex = 5;
maintable.style.height = $(window).height() + "px";
maintable.style.width = $(window).width() + "px";
maintable.style.left = 0 + "px";
maintable.style.top = 0 + "px";
maintable = document.getElementById("main");
maintable.style.height = "90%";
maintable.style.width = "90%";
maintable.style.left = $(window).width() * 0.05 + "px";
maintable.style.top = $(window).height() * 0.02 + "px";
resizePlots();
},
但是這樣做有個缺點,就是還需要手工按一下F11來達到真正的全屏。
下面有一種方法不用自己按F11的:
復制代碼 代碼如下:
<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<body >
<button id="btn" > full screen </button>
<div id="content" style="height:500px;width:500px;background:#fff">
<h1>歡迎微博互粉!</h1>
<h2>weibo.com/leavingseason</h2>
<p>相信音樂,相信五月天</p>
</div>
</body>
<script language="JavaScript">
document.getElementById("btn").onclick=function(){
var elem = document.getElementById("content");
requestFullScreen(elem);
};
function requestFullScreen(element) {
var requestMethod = element.requestFullScreen || element.webkitRequestFullScreen || element.mozRequestFullScreen || element.msRequestFullScreen;
if (requestMethod) {
requestMethod.call(element);
} else if (typeof window.ActiveXObject !== "undefined") {
var wscript = new ActiveXObject("WScript.Shell");
if (wscript !== null) {
wscript.SendKeys("{F11}");
}
}
}
</script>
</html>
這個可以支持大部分的浏覽器。但是討厭的IE還是不能支持HTML5的全屏功能,需要模擬按F11這個動作。讀者可以在代碼中看到。
還可以在代碼裡面退出全屏界面:
復制代碼 代碼如下:
function cancelFullScreen(el) {
var requestMethod = el.cancelFullScreen||el.webkitCancelFullScreen||el.mozCancelFullScreen||el.exitFullscreen;
if (requestMethod) { // cancel full screen.
requestMethod.call(el);
} else if (typeof window.ActiveXObject !== "undefined") { // Older IE.
var wscript = new ActiveXObject("WScript.Shell");
if (wscript !== null) {
wscript.SendKeys("{F11}");
}
}
}
關於全屏顯示,我還是很好奇,那麼視頻網站是如何做到對IE等浏覽器都兼容的全屏功能的。如果有誰知道的話,還請分享一下,感激不盡。
updated (2013/09/22)
很多時候,想在全屏切換的時候做一些自定義的事情。可以如下綁定事件:
復制代碼 代碼如下:
document.addEventListener("fullscreenchange", function () {
doit();
}, false);
document.addEventListener("mozfullscreenchange", function () {
doit();
}, false);
document.addEventListener("webkitfullscreenchange", function () {
doit();
}, false);
它會在每次進入或者退出全屏的時候,觸發doit()操作。