用html5(requestFullscreen) js實現點擊一個按鈕使瀏覽器全屏效果

項目中需要將后台瀏覽器的窗口全屏，也就是我們點擊一個按鈕要實現按F11全屏的效果。 在HTML5中,W3C制定了關於全屏的API，就可以實現全屏幕的效果，也可以讓頁面中的圖片，視頻等全屏目前只有google chrome 15 +, safri5.1+,firfox10+,IE11支持 
查看例子，一睹為快！

全屏：

var docElm = document.documentElement; 
//W3C
if (docElm.requestFullscreen) { 
    docElm.requestFullscreen();
}
//FireFox
else if (docElm.mozRequestFullScreen) { 
    docElm.mozRequestFullScreen();
}
//Chrome等
else if (docElm.webkitRequestFullScreen) { 
    docElm.webkitRequestFullScreen();
}
//IE11
else if (elem.msRequestFullscreen) { 
    elem.msRequestFullscreen();
}

　　退出全屏：

if (document.exitFullscreen) { 
    document.exitFullscreen();
}
else if (document.mozCancelFullScreen) { 
    document.mozCancelFullScreen();
}
else if (document.webkitCancelFullScreen) { 
    document.webkitCancelFullScreen();
}
else if (document.msExitFullscreen) { 
    document.msExitFullscreen();
}

　　事件監聽：

document.addEventListener("fullscreenchange", function () { 
fullscreenState.innerHTML = (document.fullscreen)? "" : "not ";}, false); 

document.addEventListener("mozfullscreenchange", function () { 
fullscreenState.innerHTML = (document.mozFullScreen)? "" : "not ";}, false); 

document.addEventListener("webkitfullscreenchange", function () { 
fullscreenState.innerHTML = (document.webkitIsFullScreen)? "" : "not ";}, false);

document.addEventListener("msfullscreenchange", function () { 
fullscreenState.innerHTML = (document.msFullscreenElement)? "" : "not ";}, false);

　　全屏樣式設置 ：

在瀏覽器全屏的使用我們還可以進行樣式設置

代碼如下:

html:-moz-full-screen { 
    background: red;
}

html:-webkit-full-screen { 
    background: red;
}
 
html:fullscreen {
    background: red;
}