element select all

<template>
  <div id="app">
    <!-- <router-view /> -->
    <!-- <Footer v-show="$route.meta.showFooter" /> -->
    <el-table
      ref="multipleTable"
      :data="tableData"
      tooltip-effect="dark"
      style="width: 100%"
      @select-all="selectAll"
      @select="select"
      row-key="id"
    >
      <el-table-column type="selection" width="55"> </el-table-column>
      <el-table-column label="日期" width="120">
        <template slot-scope="scope">{
    
    {
    
     scope.row.date }}</template>
      </el-table-column>
      <el-table-column prop="name" label="姓名" width="120"> </el-table-column>
      <el-table-column prop="address" label="地址" show-overflow-tooltip>
      </el-table-column>
    </el-table>
    <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="currentPage"
      :page-sizes="[4, 8]"
      :page-size="4"
      layout="total, sizes, prev, pager, next, jumper"
      :total="8"
    >
    </el-pagination>
  </div>
</template>

<script>
export default {
    
    
  data() {
    
    
    return {
    
    
      currentPage: 1,
      tableData: [
        {
    
    
          page: 1,
          id: 1,
          date: "2016-05-03",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
    
    
          page: 1,
          id: 2,
          date: "2016-05-02",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
    
    
          page: 1,
          id: 3,
          date: "2016-05-04",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
    
    
          page: 1,
          id: 4,
          date: "2016-05-01",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
      ],
      multipleSelection: [],
      checkAll: {
    
    },
    };
  },
  methods: {
    
    
    selectAll(val) {
    
    
      if (val.length === this.tableData.length) {
    
    
        this.checkAll = {
    
     [this.currentPage]: true };
        val.forEach((item) => {
    
    
          let index = this.multipleSelection.findIndex(
            (el) => el.id === item.id
          );
          if (index === -1) {
    
    
            this.multipleSelection.push(item);
          }
        });
      } else {
    
    
        this.checkAll = {
    
     [this.currentPage]: false };
        this.multipleSelection = this.multipleSelection.filter(
          (item) => item.page !== this.currentPage
        );
      }
    },
    select(rows, row) {
    
    
      if (this.checkAll[this.currentPage]) {
    
    
        this.multipleSelection = this.multipleSelection.filter(
          (item) => item.id !== row.id
        );
      } else {
    
    
        let index = this.multipleSelection.findIndex(
          (item) => item.id === row.id
        );
        if (index !== -1) {
    
    
          this.multipleSelection.splice(index, 1);
        } else {
    
    
          this.multipleSelection.push(row);
        }
      }
      if (rows.length === this.tableData.length) {
    
    
        this.checkAll = {
    
     [this.currentPage]: true };
      } else {
    
    
        this.checkAll = {
    
     [this.currentPage]: false };
      }
    },
    handleSizeChange(val) {
    
    
      this.checkAll = {
    
     [this.currentPage]: false };
      console.log(`每页 ${
      
      val} 条`);
    },
    handleCurrentChange(val) {
    
    
      this.currentPage = val;
      if (val === 1) {
    
    
        this.tableData = [
          {
    
    
            page: 1,
            id: 1,
            date: "2016-05-03",
            name: "王小虎",
            address: "上海市普陀区金沙江路 1518 弄",
          },
          {
    
    
            page: 1,
            id: 2,
            date: "2016-05-02",
            name: "王小虎",
            address: "上海市普陀区金沙江路 1518 弄",
          },
          {
    
    
            page: 1,
            id: 3,
            date: "2016-05-04",
            name: "王小虎",
            address: "上海市普陀区金沙江路 1518 弄",
          },
          {
    
    
            page: 1,
            id: 4,
            date: "2016-05-01",
            name: "王小虎",
            address: "上海市普陀区金沙江路 1518 弄",
          },
        ];
      } else {
    
    
        this.tableData = [
          {
    
    
            page: 2,
            id: 5,
            date: "2016-05-08",
            name: "王小虎",
            address: "上海市普陀区金沙江路 1518 弄",
          },
          {
    
    
            page: 2,
            id: 6,
            date: "2016-05-06",
            name: "王小虎",
            address: "上海市普陀区金沙江路 1518 弄",
          },
          {
    
    
            page: 2,
            id: 7,
            date: "2016-05-07",
            name: "王小虎",
            address: "上海市普陀区金沙江路 1518 弄",
          },
        ];
      }
      if (this.checkAll[this.currentPage]) {
    
    
        this.$refs.multipleTable.toggleAllSelection();
      } else {
    
    
        this.multipleSelection.forEach((item) => {
    
    
          this.tableData.forEach((el) => {
    
    
            if (item.id === el.id) {
    
    
              this.$nextTick(() => {
    
    
                this.$refs.multipleTable.toggleRowSelection(el);
              });
            }
          });
        });
      }
    },
  },
  // components: {
    
    
  //   Footer
  // }
};
</script>

<style lang="scss"></style>