JavaScript全屏和退出全屏事件总结（附代码）

window.isflsgrn = false;//ie11以下是否进入全屏标志，true为全屏状态，false为非全屏状态
 window.ieIsfSceen = false;//ie11是否进入全屏标志，true为全屏状态，false为非全屏状态
 //跨浏览器返回当前 document 是否进入了可以请求全屏模式的状态
 function fullscreenEnable(){
 var isFullscreen = document.fullscreenEnabled ||
 window.fullScreen ||
 document.mozFullscreenEnabled ||
 document.webkitIsFullScreen;
 return isFullscreen;
 }
 //全屏
 var fScreen = function(){
 var docElm = document.documentElement;
 if (docElm.requestFullscreen) {
 docElm.requestFullscreen();
 }
 else if (docElm.msRequestFullscreen) {
 docElm.msRequestFullscreen();
 ieIsfSceen = true;
 }
 else if (docElm.mozRequestFullScreen) {
 docElm.mozRequestFullScreen();
 }
 else if (docElm.webkitRequestFullScreen) {
 docElm.webkitRequestFullScreen();
 }else {//对不支持全屏API浏览器的处理，隐藏不需要显示的元素
 window.parent.hideTopBottom();
 isflsgrn = true;
 $("#fsbutton").text("退出全屏");
 }
 }
 //退出全屏
 var cfScreen = function(){
 if (document.exitFullscreen) {
 document.exitFullscreen();
 }
 else if (document.msExitFullscreen) {
 document.msExitFullscreen();
 }
 else if (document.mozCancelFullScreen) {
 document.mozCancelFullScreen();
 }
 else if (document.webkitCancelFullScreen) {
 document.webkitCancelFullScreen();
 }else {
 window.parent.showTopBottom();
 isflsgrn = false;
 $("#fsbutton").text("全屏");
 }
 }
 //全屏按钮点击事件
 $("#fsbutton").click(function(){
 var isfScreen = fullscreenEnable();
 if(!isfScreen && isflsgrn == false){
 if (ieIsfSceen == true) {
 document.msExitFullscreen();
 ieIsfSceen = false;
 return;
 }
 fScreen();
 }else{
 cfScreen();
 }
 })
 //键盘操作
 $(document).keydown(function (event) {
 if(event.keyCode == 27 && ieIsfSceen == true){
 ieIsfSceen = false;
 }
 });
 //监听状态变化
 if (window.addEventListener) {
 document.addEventListener('fullscreenchange', function(){ 
 if($("#fsbutton").text() == "全屏"){
 $("#fsbutton").text("退出全屏"); 
 }else{
 $("#fsbutton").text("全屏");
 }
 });
 document.addEventListener('webkitfullscreenchange', function(){ 
 if($("#fsbutton").text() == "全屏"){
 $("#fsbutton").text("退出全屏"); 
 }else{
 $("#fsbutton").text("全屏");
 }
 });
 document.addEventListener('mozfullscreenchange', function(){ 
 if($("#fsbutton").text() == "全屏"){
 $("#fsbutton").text("退出全屏"); 
 }else{
 $("#fsbutton").text("全屏");
 }
 });
 document.addEventListener('MSFullscreenChange', function(){ 
 if($("#fsbutton").text() == "全屏"){
 $("#fsbutton").text("退出全屏"); 
 }else{
 $("#fsbutton").text("全屏");
 }
 });
 }