el-table的selection多选表格改为单选

方法一：修改selection逻辑

需求场景: 选择表格数据时，需要控制单条数据的操作按钮是否禁用。

html代码:

<div class="table-wrap">
    <el-table
      ref="multipleTable"
      :data="tableData"
      tooltip-effect="dark"
      style="width: 100%"
      @selection-change="handleSelectionChange"
    >
      <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>
    <div style="margin-top: 20px">
      <!-- <el-button @click="toggleSelection([tableData[1], tableData[2]])"
        >切换第二、第三行的选中状态</el-button
      > -->
      <el-button @click="toggleSelection()">取消选择</el-button>
    </div>
  </div>

js代码:

export default {
  data() {
    return {
      tableData: [
        {
          date: "2016-05-03",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
          date: "2016-05-02",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
          date: "2016-05-04",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
          date: "2016-05-01",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
          date: "2016-05-08",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
          date: "2016-05-06",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
        {
          date: "2016-05-07",
          name: "王小虎",
          address: "上海市普陀区金沙江路 1518 弄",
        },
      ],
      multipleSelection: [], // 多选存储数据
      checkedSelection: {}, // 单选存储数据
    };
  },
  mounted() {
    document.onclick = () => {
      console.log('单选--checkedSelection', this.checkedSelection);
    }
  },
  methods: {
    toggleSelection(rows) {
      if (rows) {
        rows.forEach((row) => {
          this.$refs.multipleTable.toggleRowSelection(row);
        });
      } else {
        this.$refs.multipleTable.clearSelection();
      }
    },
    // 设置单选主要代码
    handleSelectionChange(val) {
      console.log('val--==', val);
      // 默认多选
      // this.multipleSelection = val;
 
      // 单选
      if(val.length == 1){
        let item = val[val.length -1];
        this.checkedSelection = JSON.parse(JSON.stringify(item));
      }
 
      // 单选选中多条时，需要清空所选数据
      if(val.length > 1){
        this.$refs.multipleTable.clearSelection(); // 清空选项
        this.$refs.multipleTable.toggleRowSelection(val.pop()); // 选中最后点击的数据
      }
 
      // 取消选中
      if(val.length == 0){
        this.checkedSelection = {};
      }
    },
  },
};

css代码:

<style lang="less" scoped>
// 禁用table全选按钮
/deep/.el-table__header{
    .el-checkbox{
    display: none;
    }
}
</style>

方法二：增加checkbox列

html代码:

<el-table-column type="selection" width="55">
    <template slot-scope="scope">
        <el-checkbox
            v-model="scope.row.selected"
            :disabled="isDisabled(scope.row)"
            @change="handleSelectionChange(scope.row)"
        />
    </template>
</el-table-column>

js代码：

data() {
    return {
        selectedRow: null
    }
},
methods: {
    isDisabled(row) {
        return this.selectedRow && !row.selected
    },
    handleSelectionChange(rows) {
        this.selectedRow = rows.selected ? rows : null
    },
}

方法三：增加radio列

html代码：

<template>
  <el-table
    :data="tableData"
    highlight-current-row
    @current-change="handleCurrentChange"
    style="width: 100%">
    <el-table-column
      type="radio"
      width="55">
    </el-table-column>
    <el-table-column
      prop="date"
      label="日期"
      width="180">
    </el-table-column>
    <el-table-column
      prop="name"
      label="姓名"
      width="180">
    </el-table-column>
    <el-table-column
      prop="address"
      label="地址">
    </el-table-column>
  </el-table>
</template>

js代码：

export default {
  data() {
    return {
      tableData: [{
        date: '2016-05-02',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1518 弄'
      }, {
        date: '2016-05-04',
        name: '李小虎',
        address: '上海市普陀区金沙江路 1517 弄'
      }, {
        date: '2016-05-01',
        name: '赵小虎',
        address: '上海市普陀区金沙江路 1519 弄'
      }],
      currentRow: null
    };
  },
  methods: {
    handleCurrentChange(val) {
      this.currentRow = val;
    }
  }
};