微信小程序实现列表项展开折叠功能

<view class="list">
  <view class="item" wx:for="{{list}}" wx:key="{{index}}">
    <view class="title" bind:tap="toggleItem">{{item.title}}</view>
    <view class="content" wx:if="{{item.isExpanded}}">
      <!-- 详细信息内容 -->
      <text class="info">{{item.info}}</text>
    </view>
  </view>
</view>

Page({
  data: {
    list: [
      {title: "列表项1", info: "列表项1的详细信息", isExpanded: false},
      {title: "列表项2", info: "列表项2的详细信息", isExpanded: false},
      {title: "列表项3", info: "列表项3的详细信息", isExpanded: false},
      ...
    ],
  },
  
  toggleItem: function(event) {
    var index = event.currentTarget.dataset.index;
    var list = this.data.list;
    list[index].isExpanded = !list[index].isExpanded;
    this.setData({
      list: list
    });
  }
})

.list {
  margin-top: 20rpx;
}

.item {
  padding: 10rpx;
  border-bottom: 1rpx solid #999;
}

.title {
  font-size: 28rpx;
  color: #333;
}

.content {
  margin-top: 10rpx;
  font-size: 26rpx;
  color: #666;
}

.info {
  margin-top: 10rpx;
}