background-size get's ignored with ngStyle Angular2

Question

When I inspect the element in Chrome I get the display: block; but background-size: cover; is nowhere.

Do you have an idea what could cause this?

This is my code:

 <div class="image-slides" [ngStyle]="{'background': 'linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url(' + (items | async)?.img_paths[0]+ ') center center no-repeat','display': 'block', 'background-size': 'cover'}">
   <ion-icon class="back-icon" (click)="goBack()" color="light" name="ios-arrow-round-back"></ion-icon>
   <ion-icon class="fav-icon" color="light" name="star"></ion-icon>
   <h1>Hello {{(items | async)?.name}}</h1>
 </div>

Answer 1

您应该像这样在url(' + (items | async)?.img_paths[0]+ ') ：

[ngStyle]="{'background': 'linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url(\' + (items | async)?.img_paths[0]+ \') center center no-repeat','display': 'block', 'background-size': 'cover'}"