vue-列表下详情的展开与折叠案例

<div class="arrow" :class="{'open':showDetail === index}"></div>
.arrow{
 position absolute
 width: 0.6rem;
 height: 0.3rem;
  2.0rem
 right 0.8rem
 background url(../../../assets/images/icon_up.png) no-repeat
 background-size: 100% 100%
 transition: transform 0.3s
 -webkit-transition: transform 0.3s
 &.open{
 transform : rotate(-180deg)
 }
}

<transition-group class="expert-detail" tag="div" mode="">
 <div v-for="i in 1" :key="i" class="detail" :ref="`stateopen${index}`" v-show="showDetail===index">
...
 </div>
</transition-group>

// 展开与折叠
// 分析
// 1，showDetail默认为-1，第一次任意点击B，当前B对象展开，showDetail=index=n，此时有两种情况
// 情况1,点击B，showDetail===index，B关闭，showDetail=-1
// 情况2，点击B以外的其他对象C，先关闭B，在打开当前对象C
foldAndUnfold(index,item){
 if(this.showDetail===index){//两次点击的对象相同，关闭
 this.showDetail = -1
 }else{//点击的对象不同，先关闭前一对象，再打开当前对象
 this.showDetail = index
 }
}

<!-- 注意el-table 上加一个 ref="table" -->
 <el-table ref="table" :data="list" border style="width: 100%; margin-:20px; min-height:700px">
  <el-table-column align="center" label="编号">
  <template slot-scope="scope">
   <span>{{ id }}</span>
  </template>
  </el-table-column>
 
  <el-table-column align="center" label="姓名">
  <template slot-scope="scope">
   <span>{{ name }}</span>
  </template>
  </el-table-column>
 
  <el-table-column label="操作" width="300" align="center" prop="operation">
  <template slot-scope="scope">
   <el-button plain @click="toogleExpand(scope.row)">详情</el-button>
  </template>
  </el-table-column>
 
  <!-- 展开部分 -->
  <el-table-column type="expand" width="1">
  <template slot-scope="props">
   <el-form label-position="left" inline class="demo-table-expand">
   <!-- 参数列表 -->
   <el-form-item label="1111" label-width="100%">
    aaa
   </el-form-item>
   </el-form>
 
  </template>
  </el-table-column>
 </el-table>

 <script>
 export default {
  data() {
  return {
   list: [{
   id: '1',
   name: '王小1',
   }, {
   id: '2',
   name: '王小2',
   }, {
   id: '3',
   name: '王小3',
   }, {
   id: '4',
   name: '王小4',
   }]
  }
  },
  
  methods: {
  // 展开行效果
  toogleExpand(row) {
   const $table = this.$refs.table
   // 注意，这里的 this.list 是上面 data 中的 list
   // 通过比对数据与行里的数据，对展开行进行控制，获取对应值
   this.list.map((item) => {
   if (row.id !== item.id) {
    $table.toggleRowExpansion(item, false)
   }
   })
   $table.toggleRowExpansion(row)
  },
  }
 }
 </script>

<style>
 / 展开行样式 /
 .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: 100%;
 }
 .el-form-item__content {
 width: 100%;
 }
 / 隐藏上方表格多余部分 /
 .undefined.el-table__expand-column {
 display: none;
 }
 / 隐藏上方表格多余部分 /
 .el-table_1_column_8 .el-table--border td, .el-table--border th, .el-table__body-wrapper .el-table--border.is-scrolling-left~.el-table__fixed {
 border-right: 0px solid #ebeef5
 }
</style>