element-ui的table表格勾选高亮当前行（亲测有效，拿过来直接用）_element-ui highlight-selection-row

效果如图： 

html： 

      <el-table
        class="box"
        :data="tableData"
        :height="height"
        tooltip-effect="dark"
        :row-style="selectedHighlight"
        @selection-change="handDrawer"
      >

 methods：

    selectedHighlight ({ row, rowIndex }) {
      if (this.selectRow.includes(rowIndex)) {
        return {
          'background-color': '#15499A'
        }
      }
    },
    // 获取勾中表单
    handDrawer (val) {
      this.buttonList = val
    },

 watch：

  watch: {
    buttonList (data) {
      this.selectRow = []
      if (data.length > 0) {
        data.forEach((item, index) => {
          this.selectRow.push(this.tableData.indexOf(item))
        })
      }
    }
  },

亲测有效！