一、先新建wxs文件subutil.wxs

1、寫過濾器

//return  class
var isClass = function(val) {if (val == 0) {return 'grid-item'} else if (val == 1) {return 'temperature-error-slot'} else if (val == 2) {return 'chargingCycles-error-slot'} else {return 'unrecognized-slot'}
}

2、暴露

module.exports.isClass = isClass;

? ?二、在wxml上引用

1、引入

<wxs src="../../wxs/subutil.wxs" module="tools" />

2、使用

<view 
wx:for="{{box.deviceInfoList}}" 
wx:key="index" 
wx:for-item="info" 
class="{{tools.isClass(info.alarmType)}}">{{info.globalIndex }}
</view>