el-tree右鍵菜單組件

/*********************** ContextMenu 使用說明************************************/

<jb-context-menu ref="contextMenu" class="right-menu"
                 :target="contextMenuTarget"
                 :show="contextMenuVisible"
                 @update:show="(show) => contextMenuVisible = show">
  <a href="javascript:;" @click="handleAddNode">增加</a>
  <a :class="disModify" href="javascript:;" @click="handleModifyNode">修改</a>
  <a :class="disDelete" href="javascript:;" @click="handleDeleteNode">刪除</a>
</jb-context-menu>

// 當節點鼠標右鍵點擊時觸發該事件
// event--事件（判斷位置），data--該節點對應的數據屬性，
// node -- 節點對應的Node self--節點組件本身
handleRightClick (event, data, node, self) {
  this.contextMenuVisible = true
  this.$refs.contextMenu.setPos(event.x, event.y)
},

.right-menu
  position fixed
  background #fff
  border solid 1px rgba(0, 0, 0, .2)
  border-radius 3px
  z-index 999
  display none
  box-shadow 0 0.5em 1em 0 rgba(0, 0, 0, .1)
  a
    width 75px
    height 28px
    line-height 28px
    text-align left
    display block
    color #1a1a1a
    text-decoration none
    padding 2px 20px
    &:hover
      background #42b983
      color #fff

/*********************** ContextMenu 組件定義************************************/
<template>
  <div :style="style" style="display: block;" v-show="show"
       @mousedown.stop
       @contextmenu.prevent>
    <slot></slot>
  </div>
</template>

<script>
export default {
  name: 'context-menu',
  props: {
    target: null,
    show: Boolean
  },
  data () {
    return {
      triggerShowFn: Function,
      triggerHideFn: Function,
      x: null,
      y: null,
      style: {},
      binded: false
    }
  },
  watch: {
    show (show) {
      if (show) {
        this.bindHideEvents()
      } else {
        this.unbindHideEvents()
      }
    },
    target (target) {
      this.bindEvents()
    }
  },
  methods: {
    // 初始化事件
    bindEvents () {
      this.$nextTick(() => {
        if (!this.target || this.binded) {
          return
        }
        this.triggerShowFn = this.contextMenuHandler.bind(this)
        this.target.addEventListener('contextmenu', this.triggerShowFn)
        this.binded = true
      })
    },

    // 取消綁定事件
    unbindEvents () {
      if (!this.target) {
        return
      }
      this.target.removeEventListener('contextmenu', this.triggerShowFn)
    },

    // 綁定隱藏菜單事件
    bindHideEvents () {
      this.triggerHideFn = this.clickDocumentHandler.bind(this)
      document.addEventListener('mousedown', this.triggerHideFn)
      document.addEventListener('mousewheel', this.triggerHideFn)
    },

    // 取消綁定隱藏菜單事件
    unbindHideEvents () {
      document.removeEventListener('mousedown', this.triggerHideFn)
      document.removeEventListener('mousewheel', this.triggerHideFn)
    },

    // 鼠標按壓事件處理器
    clickDocumentHandler (e) {
      this.$emit('update:show', false)
    },

    // 右鍵事件事件處理
    contextMenuHandler (e) {
      this.x = e.clientX
      this.y = e.clientY
      this.layout()
      this.$emit('update:show', true)
      e.preventDefault()
    },

    // 布局
    layout () {
      this.style = {
        left: this.x + 'px',
        top: this.y + 'px'
      }
    },
    setPos (x, y) {
      this.x = x
      this.y = y
      this.layout()
    }
  },
  mounted () {
    this.bindEvents()
  }
}
</script>