Class Dir

packages/core/test/render3/reactivity_spec.ts:419–437

      const source = signal('');

      @Directive({
        selector: '[dir]',
      })
      class Dir {
        tpl = inject(TemplateRef);
        vcr = inject(ViewContainerRef);
        cdr = inject(ChangeDetectorRef);
        ctx = {
          $implicit: '',
        };
        ref = this.vcr.createEmbeddedView(this.tpl, this.ctx);

        effectRef = effect(() => {
          if (this.ctx.$implicit !== source()) {
            this.ctx.$implicit = source();
            this.cdr.markForCheck();
          }
        });
      }

      @Component({
        imports: [Dir],