vue

created() {
    document.addEventListener('click', this.clickOutsideEvent)
},
destroyed() {
    document.removeEventListener('click', this.clickOutsideEvent)
},
methods: {
    clickOutsideEvent(e) {
        // console.log(this.$el.contains(e.target))
        if (!this.$el.contains(e.target)){
            this.handleOperater = false
        }
    }
}

html

//html
<div v-show="isShowDialog">

//js
document.addEventListener('click', (e) => {
  if (!this.$el.contains(e.target)) this.isShowDialog = false;
})