"dependencies": {
 "element-ui": "^1.3.4",
 "less": "^2.7.2",
 "less-loader": "^4.0.4",
 "vue": "^2.3.3",
 "vue-router": "^2.3.1",
 "vuedraggable": "^2.11.0"
 },

import draggable from 'vuedraggable'

components: {
　　draggable
},

<draggable v-model="tags" :move="getdata" @update="datadragEnd">
  <transition-group>
   <div v-for="element in tags" :key="element.id">
    {{element.name}}
   </div>
  </transition-group>
</draggable>

 methods: {
  getdata (evt) {
  console.log(evt.draggedContext.element.id)
  },
  datadragEnd (evt) {
  console.log('拖动前的索引 :' + evt.oldIndex)
  console.log('拖动后的索引 :' + evt.newIndex)
  console.log(this.tags)
  }
 }