vue实现点击出现按钮菜单问题

<template>
  <div class="app-container">
	  <div @click="popup($event, item)">
	  		点击
	  </div>
  	  <!-- 单击菜单 -->
      <popup-menu ref="popup" :menuData="menuData" @menuClick="menuClick(arguments)">
      </popup-menu>
  </div>
 <script>
  import PopupMenu from '@/views/popupMenu';

  export default {
  		data(){
  			return{
  				menuData: [{
		          id: 'edit',
		          name: '编辑'
		        }, {
		          id: 'delete',
		          name: '删除'
		        }], //菜单数据
  			}
  		},
		components: {
      		PopupMenu,
    	},
    	methods: {
    		popup(event, item) {
        		this.$refs.popup.show(event); //调用子组件的show方法，用于显示弹出式菜单，引用组件时，需要 ref="child"
      		},
      		menuClick(args) {
        		// 子组件的方法 @menuClick="menuClick(arguments)" 注意menuClick()里面一定要填写arguments，用于接受子组件的传参
        		let type = args[0];
		        if (type == 'edit') {
		        	console.log('编辑');
		        } else if (type == 'delete') {
		        	console.log('删除');
		        }
      		},
    	}
  }
   </script>
</template>

<template>
  <div v-if="showMenu" class="position-fixed popup-menu flex flex-col" :style="{top:clientY, left:clientX}">
    <div v-for="item in menuData" class="popup-menu-item pointer flex flex-center-cz padding-left-m" :data-id="item.id"
      @click="itemClick">{{item.name}}</div>
  </div>
</template>

<script>
  export default {
    name: 'PopupMenu',
    props: {
      menuData: {},
    },

    data() {
      return {
        showMenu: false,
        clientX: '',
        clientY: '',
      }
    },

    methods: {

      show(event) {
        // console.log("父组件传过来的event", event);
        let x = event.x; //鼠标点击的x坐标
        let y = event.y; //鼠标点击的y坐标
        let menuWidth = 150; //菜单宽度，这个与.popup-menu样式对应的宽度一致
        let menuHeight = this.menuData.length * 30 + 20; //菜单高度，根据菜单项自动计算的高度

        this.clientX = (parseFloat(x) - 10) + "px";
        this.clientY = (parseFloat(y) + 10) + "px";

        let windowWidth = document.documentElement.clientWidth; // 实时屏幕宽度
        let windowHeight = document.documentElement.clientHeight; // 实时屏幕高度

        if (parseFloat(x) + menuWidth > windowWidth) {
          this.clientX = (parseFloat(windowWidth) - menuWidth - 50) + "px";
        }
        if (parseFloat(y) + menuHeight > windowHeight) {
          this.clientY = (parseFloat(windowHeight) - menuHeight - 50) + "px";
        }
        this.showMenu = true;
        event.stopPropagation(); //阻止事件冒泡
        document.addEventListener("click", this.closeMenu, false); // 添加关闭事件
      },
      closeMenu() {
        // console.log("销毁监听事件。");
        document.removeEventListener("click", this.closeMenu, false); //销毁关闭事件
        this.showMenu = false;
      },
      itemClick(event) {
        let id = event.target.getAttribute("data-id"); //获取菜单项id
        this.$emit('menuClick', id); //传参调用父组件事件，让父组件知道是点击到哪个菜单项
      }

    }
  }
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
  .position-fixed {
    position: fixed;
  }

  .popup-menu {

    width: 80px;
    padding: 10px;
    border-radius: 10px;
    background-color: #fff;
    border-style: solid;
    border-width: 1px;
    border-color: rgba(0, 0, 0, .2);
    z-index: 999;
  }

  .popup-menu-item {
    height: 20px;
  }

  .popup-menu-item:hover {
    border-radius: 5px;
    background: rgba(0, 0, 0, .1);
  }
</style>