详解element-ui表格中勾选checkbox，高亮当前行

    <el-table
     @selection-change="handleSelectionChange"
    >

    tableData: [{
     id:0,
     date: '2016-05-03',
     name: '王小虎',
     address: '上海市普陀区金沙江路 1518 弄'
    }

   handleSelectionChange(val) {
    var arr = [];
    val.forEach((val, index) => {
　　　　　　this.tableData.forEach((v, i) => {
　　　　　　　// id 是每一行的数据id
      if(val.id == v.id){
       // console.log(i);
       arr.push(i)
      }
     })
    })  
    this.multipleSelection = arr;
   }

    <el-table
     @selection-change="handleSelectionChange"
     :row-class-name="rowStyle"
    >

        this.multipleSelection.forEach((v)=>{
     if(rowIndex === v){
      return 'rowStyle'
     }
    })

   rowStyle({row, rowIndex}){
    let arr = this.multipleSelection;
    for(let i = 0; i < arr.length; i++){
     if(rowIndex === arr[i]){
      return 'rowStyle'
     }
    } 
   }

</style>
 .rowStyle{
  background-color:red!important;
 }
</style>

  .el-table{
   width: 1163px; 
   margin: 0 auto;
   .el-table__body{
    tr:hover>td{
     background-color:rgba(238,250,249,1)!important;
    }
   }
  }