sidenav-angular/src/app/sidenav/sidenav-drawer/sidenav-drawer.component.html

<div class="sidenav-drawer">
  <ul>
    <ng-content></ng-content>
	</ul>
	<div *ngIf="urlBackground" class="sidenav-background" [style.background-image]="'url(' + urlBackground + ')'"></div>
</div>