解决了VUE在浏览器全屏下监听不到Esc键盘事件

说明：

1. 实测可以在谷歌、火狐、360 浏览器使用

2. 解决了在浏览器全屏下监听不到键盘Esc事件

3. 解决了取消全屏和全屏的同步问题，ESC按键下可以同步

4. 以下是完整的代码，

                

                    
                        
                    
                

//
data() {
                return {
              
                fullscreen: false,
               
            }
        },

created(){
			let that = this
			window.onresize = function(){
				if(!that.checkFull()){
					// 退出全屏后要执行的动作
					console.log("退出全屏")
					that.fullscreen = false;
				}
			}
		},

 methods:{
		checkFull(){
		//判断浏览器是否处于全屏状态 （需要考虑兼容问题）
		//火狐浏览器
		var isFull = document.mozFullScreen||
		document.fullScreen ||
		//谷歌浏览器及Webkit内核浏览器
		document.webkitIsFullScreen ||
		document.webkitRequestFullScreen ||
		document.mozRequestFullScreen ||
		document.msFullscreenEnabled
		if(isFull === undefined) {
        isFull = false
        }
        return isFull;

	},

// 全屏事件
            handleFullScreen(){
                let element = document.documentElement;
                if (this.fullscreen) {
                    if (document.exitFullscreen) {
                        document.exitFullscreen();
                    } else if (document.webkitCancelFullScreen) {
                        document.webkitCancelFullScreen();
                    } else if (document.mozCancelFullScreen) {
                        document.mozCancelFullScreen();
                    } else if (document.msExitFullscreen) {
                        document.msExitFullscreen();
                    }
                } else {
                    if (element.requestFullscreen) {
                        element.requestFullscreen();
                    } else if (element.webkitRequestFullScreen) {
                        element.webkitRequestFullScreen();
                    } else if (element.mozRequestFullScreen) {
                        element.mozRequestFullScreen();
                    } else if (element.msRequestFullscreen) {
                        // IE11
                        element.msRequestFullscreen();
                    }
                }
                this.fullscreen = !this.fullscreen;
            },

}