报错：Now you can provide attr `wx:key` for a `wx:for` to improve performance

文章目录

问题
报错
解决办法

问题

在小程序开发时出现缺少wx：key的错误

报错

Now you can provide attr wx:key for a wx:for to improve performance

解决办法

在使用wx:for遍历的时候，未绑定key值
绑定方法：wx:key="index"或wx:key="this"

<!--wxml-->
<view wx:for="{{array}}" wx:key="index"> {{index}}-{{item}}</view>

// page.js
Page({data: {array: [1, 2, 3, 4, 5]}
})

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报错：Now you can provide attr `wx:key` for a `wx:for` to improve performance

文章目录

问题

报错

解决办法

报错：Now you can provide attr `wx:key` for a `wx:for` to improve performance相关推荐

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