el-table單擊某行，背景色改變：

<el-table
  highlight-current-row="true"
  @row-click="openDetails"
>
</el-table>

<script>
    methods: {
        openDetails(row) {
               this.crud.selections = [];
              this.crud.selections.push(row);
              this.$refs.table.clearSelection();
              this.$refs.table.toggleRowSelection(row);
}
    }
</script>

<style>
    /* 用來設置當前頁面element全局table 選中某行時的背景色*/
    /deep/ .el-table__body tr.current-row>td{
      background-color: #E7F6F5 !important;
    }
</style>

單擊效果：