<repeat for="{{array}}" key="index" index="index" item="item"> <form report-submit="true" @submit="submit" @reset="reset"> <button form-type="submit" class="form_button"> <view class="nr_price {{state==index?\'active-tag\':\'\'}}" @tap="select_date" data-key=\'{{index}}\'> {{item.price}} </view> </button> </form> </repeat>     .nr_price { margin-top: 29rpx; float: left; width: 164rpx; height: 80rpx; background: #fff; box-shadow: 0px 1px 6px 0px rgba(0, 0, 0, 0.15); border-radius: 10rpx; margin-right: 30rpx; font-size: 30rpx; font-family: PingFang-SC-Regular; font-weight: 400; color: #333333; text-align: center; line-height: 80rpx; } .active-tag { color: #F83E4D; }       state: \'\', select_date(e) { // this.setData({ // state: e.currentTarget.dataset.key, // }); this.state = e.currentTarget.dataset.key this.$apply(); }