微信小程序 动态绑定事件并实现事件修改样式

<scroll-view class="reportTypeScroll" scroll-x="true" scroll-left="{{toLeftNum}}"> 
 <block wx:for-items="{{reportTypeList}}" wx:key="{{index}}"> 
  <text type="primary"  bindtap="bind{{item.id}}" data-typeid="{{item.id}}" class="{{currentId==item.id?'clickSel':'removeSel'}}">{{item.name}}</text> 
 </block> 
</scroll-view> 

var reportTypeList = [ 
 { name: "日报1", id: "1" }, 
 { name: "目录2", id: "2" }, 
 { name: "季报3", id: "3" }, 
 { name: "月报4", id: "4" }, 
 { name: "日报5", id: "5" }, 
 { name: "目录6", id: "6" }, 
 { name: "季报7", id: "7" }, 
 { name: "月报8", id: "8" }, 
 { name: "日报9", id: "9" }, 
 { name: "目录10", id: "10" }, 
 { name: "季报11", id: "11" }, 
 { name: "月报12", id: "12" }] 
 
var pageObject = { 
 data: { 
  reportTypeList: reportTypeList, 
  num: 0, 
  toLeftNum: 0, 
  itemWidth: 150 
 } 
} 
 
for (var i = 0; i < reportTypeList.length; i++) { 
 (function (item) { 
  pageObject['bind' + item.id] = function (e) { 
   var id = parseInt(e.currentTarget.dataset.typeid) 
 
   this.setData({ 
    currentId: id 
   }) 
  } 
 })(reportTypeList[i]) 
} 
 
Page(pageObject) 

/**index.wxss**/ 
 
.reportTypeScroll { 
 margin: 40px 0px 20px 0px; 
 white-space: nowrap; 
 display: flex; 
} 
 
.clickSel { 
 color: red; 
} 
 
.removeSel { 
 color: black; 
} 
 
text { 
 height: 150rpx; 
 display: inline-block; 
 text-align: center; 
}