@H_301_8@#index.wxml

<view>今天吃啥</view>

<view wx:if="{{condition==1}}">@H_301_8@
饺子
</view>
<view wx:elif="{{condition ==2}}">@H_301_8@
馒头
</view>
<view wx:else> 面条</view>@H_301_8@

#index.js

    data: {

      "condition":Math.floor(Math.random()*3+1@H_301_8@)
    },