javascript - How to check empty object in angular 2 template using *ngIf -

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i want check if object empty dont render element, , code:

<div class="comeback_up" *ngif="previous_info != {}">    <a        [routerlink]="['inside_group_page',{'name':previous_info.path | dottodash }]"       >         {{previous_info.title}}    </a> </div>

but code wrong, best way this?

this should want:

<div class="comeback_up" *ngif="(previous_info | json) != ({} | json)">

or shorter

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

each {} creates new instance , ==== comparison of different objects instances results in false. when convert strings === results true

plunker example


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