element-ui实现表格el-table展开行

　　项目开发中，遇到个详情页面，展示项过多，在屏幕上展示出现过长的横向滚动条，用户体验度不高，跟产品协商，由产品列出优先展示项，剩下部分折叠

　　标红属性:

　　　　row-click: 当某一行点击时触发

　　　　row-key: 行数据的key,用于优化talbe的渲染

　　　　expand-row-keys: 可通过这个属性设置表格的当前展开行(必需row-key属性)

　　　　expand-change:  用于某一行点击展开或者关闭时触发(展开行时，第二个属性为expandedRows，关闭行时，第二个属性为expanded)

<template> 
 <el-table :data="tableData" style=" 100%" @row-click="rowClick" :row-key='getRowKeys' :expand-row-keys="expands" @expand-change="expandChange" ref="tableList">
    <el-table-column type="expand">
      <template slot-scope="props">
        <el-form label-position="right" inline class="demo-table-expand" align="right">
          <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>
<script>
export default {
  data() {
    return {
      tableData: [
        {
          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"+'<br>'+"asfdasfafasdfasdfas",
          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",
        },
      ],
      expands: []
    };
  },
  methods: {
    rowClick(row){//点击行时展开收起
      this.$refs.tableList.toggleRowExpansion(row);
    },
    expandChange(row,expandedRows){//
      let that = this;
      if(expandedRows.length){//此时展开
        that.expands = [];
        if(row){
          that.expands.push(row.id);
        }
      }else{//折叠
        that.expands = [];
      }
    },
    getRowKeys(row){//行数据的key，用于优化table的渲染
      return row.id;
    }
  }
};
</script>
<style scoped>
.demo-table-expand {
  font-size: 0;
}
.demo-table-expand .el-form-item {
  margin-right: 0;
  margin-bottom: 0;
   50%;
}
</style>
<style>//在添加scoped时未生效

.demo-table-expand .label{
  150px;
  color: #99a9bf;
}

</style>

注：代码及数据由官网获取更改

后续问题：

　　列表中存在操作按钮列，点击操作按钮时，同时会触发row-click

问题解决:

<el-button type="warning" size="mini" circle icon="el-icon-question" @click.stop="diagnose"></el-button>