How to check empty object in angular template using ngIf

0 votes

I want to check if my object is empty dont render my element, and this is my code:

<div class="comeBack_up" *ngIf="previous_info != {}">
   <a 
      [routerLink]="['Inside_group_page',{'name':previous_info.path | dotTodash }]"
      >
        {{previous_info.title}}
   </a>
</div>

but my code is wrong, what is the best way to do this?

Sep 8, 2020 in Angular by kartik
• 37,510 points
3,956 views

1 answer to this question.

0 votes

Hello @kartik,

Use this:

<div class="comeBack_up" *ngIf="(previous_info | json) != ({} | json)">

or shorter

<div class="comeBack_up" *ngIf="(previous_info | json) != '{}'">

Each {} creates a new instance and ==== comparison of different objects instances always results in false. When they are convert to strings === results to true

Hope it helps!!
Thank you!!

answered Sep 8, 2020 by Niroj
• 82,720 points

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