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

Question

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

Answer 1

A bit of a lengthier way (if interested in it):

In your typescript code do this:

this.objectLength = Object.keys(this.previous_info).length != 0;

And in the template:

ngIf="objectLength != 0"