element 右键菜单

<template>
  <div id="dropMenu"
       :style="style"
       style="display: block;"
       v-show="show"
       @mousedown.stop   <!--阻止冒泡事件-->
       @contextmenu.prevent><!--阻止右键的默认事件-->
    <slot></slot>
  </div>
</template>
<script>
export default {
  data() {
    return {
      triggerShowFn: () => {},
      triggerHideFn: () => {},
      x: null,
      y: null,
      style: {},
      binded: false
    }
  },
  props: {
    target: null,
    show: Boolean
  },
  mounted() {
    this.bindEvents()
  },
  watch: {
    show(show) {
      if (show) {
        this.bindHideEvents()
      } else {
        this.unbindHideEvents()
      }
    },
    target(target) {
      this.bindEvents()
    }
  },
  methods: {
    // 初始化事件
    bindEvents() {
      this.$nextTick(() => {
        var that = this
        if (!this.target || this.binded) return
        this.triggerShowFn = this.contextMenuHandler.bind(this)
        this.target.addEventListener(‘contextmenu‘, this.triggerShowFn)
        //this.binded = true
      })
    },
    // 取消绑定事件
    unbindEvents() {
      if (!this.target) return
      this.target.removeEventListener(‘contextmenu‘, this.triggerShowFn)
    },
    // 绑定隐藏菜单事件
    bindHideEvents() {
      this.triggerHideFn = this.clickDocumentHandler.bind(this)
      document.addEventListener(‘mousedown‘, this.triggerHideFn)
      document.addEventListener(‘mousewheel‘, this.triggerHideFn)
    },
    // 取消绑定隐藏菜单事件
    unbindHideEvents() {
      document.removeEventListener(‘mousedown‘, this.triggerHideFn)
      document.removeEventListener(‘mousewheel‘, this.triggerHideFn)
    },
    // 鼠标按压事件处理器
    clickDocumentHandler(e) {
      this.$emit(‘update:show‘, false) //隐藏
    },
    // 右键事件事件处理
    contextMenuHandler(e) {
      e.target.click()//这个是因为我需要获取tree节点的数据，所以我通过点击事件去获取数据
      this.x = e.clientX - 240
      this.y = e.clientY - 110
      this.layout()
      this.$emit(‘update:show‘, true)  //显示
      e.preventDefault()
      e.stopPropagation()

      this.$emit(‘targetElement‘, e.target) //我还要获取右键的DOM元素进行操作
    },
    // 布局
    layout() {
      this.style = {
        left: this.x + ‘px‘,
        top: this.y + ‘px‘
      }
    }
  }
}
</script>
<style lang="scss">
#dropMenu {
  position: absolute;
  margin: 0;
  padding: 0;
  width: 80px;
  height: auto;
  border: 1px solid #ccc;
  border-radius: 4px;
  ul {
    list-style: none;
    margin: 0;
    padding: 0;
    li {
      width: 100%;
      text-align: center;
      height: 30px;
      line-height: 30px;
      background: #eee;
      margin-bottom: 1px;
      cursor: pointer;
    }
  }
}
</style>

 <menu-context :target="contextMenuTarget"
                        :show="isShowDrop"
                        @update:show="(show) => isShowDrop = show"
                        @targetElement="getTargetElement">
            <ul>
　　　　　　　　<!--按需展示按钮-->
              <li @click="deleteOne"
                  v-show="isShowDelete">删除</li>
              <li @click="add"
                  v-show="isShowAdd">添加</li>
              <li @click="editNode"
                  v-show="isShowEdit">编辑</li>
              <li @click="linkModels"
                  v-show="isShowLink">关联</li>
              <li @click="move"
                  v-show="isShowMove">转移</li>
            </ul>
          </menu-context>

 mounted() {
　　//dom加载完，进行目标dom的设置，直接在data中赋值，会找不到dom
    this.contextMenuTarget = document.querySelector(‘#modelTree‘)
  },

methods: {
    getTargetElement(v) {
      this.targetElement = v
    },
    deleteOne() {
      var that = this
      var nodeIds = [this.thisformdata.nodeId]
      this.$confirm(‘此操作将删除该节点及其子节点, 是否继续?‘, ‘提示‘, {
        confirmButtonText: ‘确定‘,
        cancelButtonText: ‘取消‘,
        type: ‘warning‘,
        center: true
      })
        .then(() => {
          deleteTreeNode(that.spaceTreeId, nodeIds).then(function(res) {
            console.log(‘deleteTreeNode‘, res)
            if (res.success) {
              that.$message(‘删除成功！‘)
              that.refreshSpaceTree()
            }
          })
        })
        .catch(() => {})
    },
    add() {
      this.append(this.thisformdata)
      this.isShowDrop = false
    },
    editNode() {
      var data = this.thisformdata
      var str = "<input type=‘text‘ name=‘label‘ value=‘" + data.name + "‘>"
      var e = window.event
      var text = this.targetElement
      text.innerHTML = str
      this.isShowDrop = false
      text.lastChild.onblur = function() {
        data.name = text.lastChild.value
        text.innerHTML = text.lastChild.value
        var that = this
        var space = {
          nodeId: data.nodeId,
          orgnazitionalTreeID: data.orgnazitionalTreeID,
          parentNodeId: data.parentNodeId,
          name: data.name,
          nodeType: data.nodeType
        }
        //发送请求修改内容=>?有问题明天要修改
        modifyTreeNode(data.orgnazitionalTreeID, space).then(function(res) {
          console.log(‘modifyTreeNode‘, res)
        })
      }
    },
    move() {
      if (this.thisformdata.nodeType == 0) {
        this.$refs.modelLinkSpace.Open([this.thisformdata])
      }
      this.isShowDrop = false
    },
    linkModels() {
      this.linkModel({}, this.thisformdata)
    },
    handleNodeClick(data) {
      console.log(‘handleNodeClick‘, data)
      // !核心 : 节点数据被获得
      this.thisformdata = data
　　　　//按需展示不同的按钮
      if (data.nodeType == 1 && !data.children) {
        this.isShowAdd = true
        this.isShowLink = true
        this.isShowMove = true
      } else if (data.nodeType == 0) {
        this.isShowAdd = false
        this.isShowLink = false
        this.isShowMove = true
      } else if (data.nodeType == 1 && data.children && data.children[0].nodeType == 0) {
        this.isShowAdd = false
        this.isShowLink = true
        this.isShowMove = true
      } else if (data.nodeType == 1 && data.children && data.children[0].nodeType == 1) {
        this.isShowAdd = true
        this.isShowLink = false
        this.isShowMove = false
      }
    },