微信小程式中如何在wx：for裡判斷具體哪一個頁面跳轉

//wx：for循環選項

<view class='function_container'>

<view class='function_item' bindtap ='readData' wx:for="{{functions}}" wx:for-index="idx​​"  wx:for-item="function">

<image class='function_img' src ='{{function.pic_url}}' mode='aspectFit' />

<view data-id="{{function.id}}" class='function_name'>{{function .name}}</view>

</view>

#</view>

//js

#page({

data:{

functions: [

{

#"name": "庫存",

"pic_url": '. ./image/half-star.png',

},

{

"name": "報表",

"pic_url": '../image/half-star.png'

},

{

"name": "商品管理",

"pic_url ": '../image/half-star.png'

},

{

"name": "訂購",

" pic_url": '../image/half-star.png'

},

#{

"name": "機票",

"pic_url": '../image/half-star.png'

},

{

"name": "火車票",

"pic_url": '../image/half-star.png'

},

{

"name": "手機儲值",

"pic_url": '../image/half-star.png'

#},

{

"name": "水電煤" ,

"pic_url": '../image/half-star.png'

#}

]

#},

}

})

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