Method slideIn

packages/core/test/acceptance/animation_spec.ts:989–992

(event: AnimationCallbackEvent)

      class TestComponent {
        count = signal(0);
        slideIn(event: AnimationCallbackEvent) {
          this.count.update((c) => (c += 1));
          event.animationComplete();
        }
      }
      TestBed.configureTestingModule({animationsEnabled: true});