Vue.Draggable实现交换位置

copyList(){
   this.copyList=this.list.slice(0)
}

const item=this.copyList[oldIndex]
this.copyList.splice(oldIndex, 1, this.copyList[newIndex]);
this.copyList.splice(newIndex, 1, item);

this.list=this.copyList
this.copyList = this.list.slice(0);

import draggable from "@/vuedraggable";
let id = 1;
export default {
  name: "simple",
  display: "Simple",
  order: 0,
  components: {
    draggable,
  },
  data() {
    return {
      enabled: true,
      list: [{ name: "a" }, { name: "b" }, { name: "c" }],
      dragging: false,
      index: 0,
      copyList: [],
    };
  },
  computed: {
    draggingInfo() {
      return this.dragging ? "under drag" : "";
    },
  },
  created() {
    this.copyList = this.list.slice(0);
  },
  methods: {
    add: function () {
      this.list.push({ name: "Juan " + id, id: id++ });
    },
    replace: function () {
      this.list = [{ name: "Edgard", id: id++ }];
    },
    end({ oldIndex, newIndex }) {
      const item = this.copyList[oldIndex];
      this.copyList.splice(oldIndex, 1, this.copyList[newIndex]);
      this.copyList.splice(newIndex, 1, item);
      this.list = this.copyList;
      this.copyList = this.list.slice(0);
    },
  }
};

<draggable
        :list="list"
        :disabled="!enabled"
        class="list-group"
        ghost-class="ghost"
        :move="checkMove"
        @end="end"
        @sort="sort"
        @update="update"
        @start="start"
      >
  <div class="list-group-item" v-for="element in list" :key="element.name">{{ element.name }}</div>
</draggable>