methods: {

　　　　// 全屏 点击按钮
        allping(){
        this.status = true;
        this.enterFullscreen();
        },
       // 缩小 点击按钮
       narrow(){
       this.status = false;
       this.exitFullscreen();
      },

// 进入全屏方法

        enterFullscreen() {

            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(docElm.msRequestFullscreen) {

                docElm.msRequestFullscreen();

            }

        },

        // 退出全屏方法

        exitFullscreen() {

            //W3C

            if (document.exitFullscreen) {

                document.exitFullscreen();

            }

            //FireFox

            else if (document.mozCancelFullScreen) {

                document.mozCancelFullScreen();

            }

            //Chrome等

            else if (document.webkitCancelFullScreen) {

                document.webkitCancelFullScreen();

            }

            //IE11

            else if (document.msExitFullscreen) {

                document.msExitFullscreen();

            }

        },

        // 判断当前页面是否全屏

    getFullScreenStatus() {

      this.status = !!(

        document.fullscreen ||

        document.mozFullScreen ||

        document.webkitIsFullScreen ||

        document.webkitFullScreen ||

        document.msFullScreen

      );

    },

},

mounted() {
// 监听浏览器全屏事件
let that = this;
document.addEventListener("fullscreenchange", function() {
that.getFullScreenStatus();
});

document.addEventListener("mozfullscreenchange", function() {
that.getFullScreenStatus();
});

document.addEventListener("webkitfullscreenchange", function() {
that.getFullScreenStatus();
});

document.addEventListener("msfullscreenchange", function() {
that.getFullScreenStatus();
});

},