封装Html5 Fullscreen API
进入，退出全屏或是否全屏事件：
// Webkit (works in Safari5.1 and Chrome 15)
element.webkitRequestFullScreen();
document.webkitCancelFullScreen();
测试环境chrome39支持document.webkitExitFullscreen()
document.webkitIsFullScreen
// Firefox 10+
element.mozRequestFullScreen();
document.mozCancelFullScreen();
document.mozFullScreen
//ie11
element.msRequestFullscreen();
document.msExitFullscreen();
// W3C 提议
element.requestFullscreen();
document.exitFullscreen();
document.fullscreen
接下来封装代码：
!function(w,d){
var fs={
supportsFullScreen:false,
isFullScreen:false,
requestFullScreen:'',
exitFullScreen:'',
fullscreenchange:'',
prefix:''
},
aP=['webkit','moz','ms'], //opera 15 支持全屏是webkit内核
len=aP.length,
i=0;
if(d.exitFullscreen){
fs.supportsFullScreen=true
}else{
for(; i<len; i++){
if(d[aP[i]+'ExitFullscreen'] || d[aP[i]+'CancelFullScreen']){
fs.supportsFullScreen=true;
fs.prefix=aP[i];
break
}
}
}
if(fs.supportsFullScreen){
var p=fs.prefix;
fs.fullscreenchange=function(fn){
d.addEventListener(p=='ms' ? 'MSFullscreenChange' : p+'fullscreenchange',function(){
fn && fn()
},false)
};
fs.fullscreenchange(function(){
fs.isFullScreen=(function(p){
switch (p) {
case '':
return d.fullscreen;
case 'webkit':
return d.webkitIsFullScreen;
case 'moz':
return d.mozFullScreen;
case 'ms':
return d.msFullscreenElement ? true : false
}
})(p)
});
fs.requestFullScreen=function(elem){
var elem=elem || d.documentElement;
try{
p ? elem[p+'RequestFullScreen']() : elem.requestFullScreen() //chrome，ff，标准
}catch(e){
elem[p+'RequestFullscreen']() //elem.msRequestFullscreen
}
};
fs.exitFullScreen=function(){
try{
p ? d[p+'ExitFullscreen']() : d.exitFullscreen() //ie，新版chrome或标准
}catch(e){
d[p+'CancelFullScreen']() //老版chrome 火狐
}
}
}
w.fs=fs
}(window,document);
使用方法：
<body>
<p id="launch">进入全屏</p>
</body>
var oBtn=document.getElementById('launch');
oBtn.onclick=function(){
if(fs.supportsFullScreen){
fs.isFullScreen ?
(fs.exitFullScreen(), this.innerHTML='进入全屏') :
(fs.requestFullScreen(), this.innerHTML='退出全屏')
}else{
alert('Sorry: Your browser does not support fullScreen preview.')
}
};
fs.fullscreenchange(function(){
oBtn.innerHTML = fs.isFullScreen ? '退出全屏' : '进入全屏'
})
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