微信小程序中wx-if的用法

<view wx-if="false">我隐藏了</view>

<view wx-if="true">我隐藏了</view>

>wx:if用来判断

<view wx:if="{{length >19}}">20</view>

<view wx:elif="{{length >16}}">15</view>

<view wx:else>0</view>

<view wx:if="{{ !a }}">逻辑非</view>

<view wx:if="{{ a || b }}">逻辑或</view>

<view wx:if="{{ a &&b }}">逻辑与</view>

1

2

3

wx:if else 的判断

<view wx:if="{{ a >5 }}">6</view>

<view wx:elif="{{ a <5 }}">4</view>

<view wx:else>5</view>