table组件批量操作

<el-table
        :key="tableKey"
        :data="list"
        v-loading="listLoading"
        element-loading-text
        fit
        highlight-current-row
        size="small"
        @selection-change="handleSelectionChange"
      >
        <el-table-column type="selection" width="30"></el-table-column>
handleSelectionChange(val) {
      this.multipleSelection = val
    },
multipleSelection: [],
this.ids = []
          for (const i in this.multipleSelection) {
            this.ids.push(this.multipleSelection[i].id)
          }