Now you can provide attr "wx:key" for a "wx:for" to improve performance.
2017-09-04 17:17
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在创建一个新的微信小程序项目会生成一个默认的helloword，点击头像后，进入一个日志页面，然后在控制台中出现下面提示：
Now you can provide attr "wx:key" for a "wx:for" to improve performance.
这里不要慌，只是一个警告，大意为在在使用了wx:for后，同时添加wx:key能够提示性能
解决方案：
在wx:for后面添加wx:key="key" 即可消除警告
Now you can provide attr "wx:key" for a "wx:for" to improve performance.
这里不要慌，只是一个警告，大意为在在使用了wx:for后，同时添加wx:key能够提示性能
解决方案：
在wx:for后面添加wx:key="key" 即可消除警告
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