小弟想做个样式更改的,但不知为啥三元运算没结果出来 求大佬指导
hxml
<scroll-view class="left_content" scroll-y> <view class="cata_name {{num==cur_num? 'active' : ' '}}" wx:for="{{catagory_left_list}}" wx:for-item="cata_item" wx:key="cata" data-num="{{index}}" bindtap="changePage">{{cata_item.cat_name}}</view> </scroll-view>
js
data: { catagory_left_list:[], catagory_right_list:[], cur_num:0 }changePage:function(e){ console.log(e) let index = e.currentTarget.dataset.num; this.setData({ cur_num:index, catagory_right_list:this.catas[e.currentTarget.dataset.num].children }) }
{{index==cur_num?'active':''}}