Ionic toolbar dynamically change background image

Hi,

I have problem whit adding a background image dynamically to toolbar.
I try whit:

HTML
 <ion-toolbar  [ngStyle]="mainBackground" [ngClass]="color == 53 ? 'pet' : 'not-pet'" class="single-header-bg">

TS:
  this.mainBackground: {
                    background: 'url(' image/url ')',
}

This returns


but i need to get --background, i try to insert in to TS --background but then it doesn’t appear at all.


2.

HTML 
<ion-toolbar  [style.background]="bgImage" [ngClass]="color == 53 ? 'pet' : 'not-pet'" class="single-header-bg">

TS
 this.bgImage = 'url(' image/url ')',

This doesn’t return nothing, i just see on web some one make this work for a background-color.

Thank you for your help :wink: