vue中点击屏幕其他区域关闭自定义div弹出框

mounted: function () {
    let that = this;
    $(document).on('click', function (e) {
        let dom = $('.myDiv')[0]; // 自定义div的class

        if (dom) {
            // 如果点击的区域不在自定义dom范围
            if (!dom.contains((e.target))) {
                that.showMyDiv = false;
            }
        } 
    });
},
beforeDestroy() {
    $(document).off('click');
}