vue 全屏（无需安装插件）

template中写

 <div class="btn-fullscreen" @click="handleFullScreen">
           <el-tooltip effect="dark" :content="fullscreen ? `取消全屏`:`全屏`" placement="bottom">
              <i class="el-icon-rank"></i>
           </el-tooltip>
</div>

script中写

data(){
return {
fullscreen: false
}
}  

methods中写

// 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;
}