element 实现行可拖拽的table

element官方提供了table，但是是基于基本功能的，现在来做一个 行可拖拽的table

废话少说，直接上代码

<template>
  <div>
    <el-table
      ref="dragTable"
      :data="list"
      border
      fit
      highlight-current-row
      row-key="date"
      style="width: 100%"
    >
      <el-table-column prop="date" label="日期" align="center"></el-table-column>
      <el-table-column prop="name" label="姓名" align="center"></el-table-column>
      <el-table-column prop="address" label="地址" align="center"></el-table-column>
    </el-table>
  </div>
</template>
 <script>
import Sortable from "sortablejs"; // 引入拖拽js 这个是实现拖拽功能的核心，可以通過npm 安裝，文檔鏈接：http://www.sortablejs.com/options.html

export default {
  data() {
    return {
      list: [
        {
          date: "1111111",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄"
        },
        {
          date: "22222222222",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1517 弄"
        },
        {
          date: "333333333",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1519 弄"
        },
        {
          date: "44444444444",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1516 弄"
        },
        {
          date: "555555555",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1516 弄"
        },
        {
          date: "6666666666",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1516 弄"
        },
        {
          date: "777777777777",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1516 弄"
        },
        {
          date: "888888888",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1516 弄"
        }
      ],
      sortable: null
    };
  },
  mounted() {
    this.setSort();
    console.log("waht？？", this.$refs.dragTable.$el);
  },
  methods: {
    setSort() {
      const el = this.$refs.dragTable.$el.querySelectorAll(
        ".el-table__body-wrapper > table > tbody"
      )[0];
      this.sortable = new Sortable(el, {
        ghostClass: "blue-background-class", // Class name for the drop placeholder,// 抓取的元素的类名，简单来说就是抓取元素的时候给他加一个类名blue-background-class
        setData: function(dataTransfer) {
          console.log("dataTransfer", dataTransfer);
          dataTransfer.setData("Text", "");
        },

        onEnd: evt => {   // console 一下 evt ，你就明白下面为什么这样写
          const targetRow = this.list.splice(evt.oldIndex, 1)[0];
          this.list.splice(evt.newIndex, 0, targetRow);
        }
      });
    }
  }
};
</script>