代码如下：

         // 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
        }

调用示例：

handleFullScreen();