角度4:* ng如果具有多个条件 [英] angular 4: *ngIf with multiple conditions

问题描述

我有点困惑.如果结果有以下几种情况之一，则需要隐藏块.但是似乎无法正常工作...

I'm confused a bit. I need to hide block if result have one of several cases. But seems it not working correctly...

<div *ngIf="currentStatus !== 'open' || currentStatus !== 'reopen' ">

    <p padding text-center class="text-notification">{{message}}</p>

</div>

它只是在其他条件下出现了.它既不适用于1个条件，也不适用于2个条件.也尝试了 * ngIf ="currentStatus！==('open'||'reopen')" ，但仅对1种情况有效.

It's just appeared with other condition. It doesn't work neither 1 condition nor for 2. Also tried *ngIf="currentStatus !== ('open' || 'reopen') " but it's works ok only for 1 case.

推荐答案

除了冗余的)，此表达式始终为 true ，因为 currentStatus 将始终符合以下两个条件之一:

Besides the redundant ) this expression will always be true because currentStatus will always match one of these two conditions:

currentStatus !== 'open' || currentStatus !== 'reopen'

也许您是指其中之一

!(currentStatus === 'open' || currentStatus === 'reopen')
(currentStatus !== 'open' && currentStatus !== 'reopen')

这篇关于角度4:* ng如果具有多个条件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！