element-ui表格点击一行展开

转载：https://www.cnblogs.com/xiaochongchong/p/8127282.html

<template>
    <el-table
            :data="tableData5"
            style="width: 100%"
            row-key="id"
            :expand-row-keys="expands"
            @row-click="rowClick">
        <el-table-column type="expand">
            <template slot-scope="props">
                <el-form label-position="left" inline class="demo-table-expand">
                    <el-form-item label="商品名称">
                        <span>{{ props.row.name }}</span>
                    </el-form-item>
                    <el-form-item label="所属店铺">
                        <span>{{ props.row.shop }}</span>
                    </el-form-item>
                    <el-form-item label="商品 ID">
                        <span>{{ props.row.id }}</span>
                    </el-form-item>
                    <el-form-item label="店铺 ID">
                        <span>{{ props.row.shopId }}</span>
                    </el-form-item>
                    <el-form-item label="商品分类">
                        <span>{{ props.row.category }}</span>
                    </el-form-item>
                    <el-form-item label="店铺地址">
                        <span>{{ props.row.address }}</span>
                    </el-form-item>
                    <el-form-item label="商品描述">
                        <span>{{ props.row.desc }}</span>
                    </el-form-item>
                </el-form>
            </template>
        </el-table-column>
        <el-table-column
                label="商品 ID"
                prop="id">
        </el-table-column>
        <el-table-column
                label="商品名称"
                prop="name">
        </el-table-column>
        <el-table-column
                label="描述"
                prop="desc">
        </el-table-column>
    </el-table>
</template>

<style>
    .demo-table-expand {
        font-size: 0;
    }
    .demo-table-expand label {
        width: 90px;
        color: #99a9bf;
    }
    .demo-table-expand .el-form-item {
        margin-right: 0;
        margin-bottom: 0;
        width: 50%;
    }
</style>

<script>
    export default {
        data() {
            return {
                tableData5: [{
                    id: '12987122',
                    name: '好滋好味鸡蛋仔',
                    category: '江浙小吃、小吃零食',
                    desc: '荷兰优质淡奶，奶香浓而不腻',
                    address: '上海市普陀区真北路',
                    shop: '王小虎夫妻店',
                    shopId: '10333'
                }, {
                    id: '12987123',
                    name: '好滋好味鸡蛋仔',
                    category: '江浙小吃、小吃零食',
                    desc: '荷兰优质淡奶，奶香浓而不腻',
                    address: '上海市普陀区真北路',
                    shop: '王小虎夫妻店',
                    shopId: '10333'
                }, {
                    id: '12987125',
                    name: '好滋好味鸡蛋仔',
                    category: '江浙小吃、小吃零食',
                    desc: '荷兰优质淡奶，奶香浓而不腻',
                    address: '上海市普陀区真北路',
                    shop: '王小虎夫妻店',
                    shopId: '10333'
                }, {
                    id: '12987126',
                    name: '好滋好味鸡蛋仔',
                    category: '江浙小吃、小吃零食',
                    desc: '荷兰优质淡奶，奶香浓而不腻',
                    address: '上海市普陀区真北路',
                    shop: '王小虎夫妻店',
                    shopId: '10333'
                }],

                // 要展开的行，数值的元素是row的key值
                expands: []
            }
        },
        methods:{
         //在<table>里，我们已经设置row的key值设置为每行数据id：row-key="id"
            rowClick(row, event, column) {
                Array.prototype.remove = function (val) {
                    let index = this.indexOf(val);
                    if (index > -1) {
                        this.splice(index, 1);
                    }
                };

                if (this.expands.indexOf(row.id) < 0) {
                    this.expands.push(row.id);
                } else {
                    this.expands.remove(row.id);
                }

            }
        }

    }
</script>

主要更改部分：

在<table>中添加：

row-key="id"
:expand-row-keys="expands"
@row-click="rowClick"

实现展开当前行的时候，其他行都能收起来

（即在rowClick函数给expands添加之前，先清空这个数组）

      if (this.expands.indexOf(row.id) < 0) {
        this.expands = [];     // 清空expangds
        this.expands.push(row.id);
      } else {
        this.expands.remove(row.id);
      }