paperless-ngx/src-ui/src/app/components/common/toasts/toasts.component.html

<ngb-toast
  *ngFor="let toast of toasts"
  [header]="toast.title" [autohide]="true" [delay]="toast.delay || 5000"
  [class]="toast.classname"
  (hide)="toastService.closeToast(toast)">
  <p>{{toast.content}}</p>
  <p *ngIf="toast.action"><button class="btn btn-sm btn-outline-secondary" (click)="toastService.closeToast(toast); toast.action()">{{toast.actionName}}</button></p>
</ngb-toast>