Experiment

src/app/directives/virtual-scroller-content/virtual-scroll.directive.ts

@@ -0,0 +1,26 @@
+import {Directive, Input} from '@angular/core';
+import {ScrollerContentOptions} from 'primeng/scroller';
+
+interface CoolScrollerContentOptions<T extends object> extends ScrollerContentOptions {
+  items?: T[];
+}
+
+interface TableRowTemplateContext<T extends object> {
+  $implicit: T;
+  options: CoolScrollerContentOptions<T>;
+}
+
+@Directive({
+  selector: 'ng-template[appVirtualScroll]'
+})
+export class VirtualScrollDirective<T extends object>{
+
+  @Input('appVirtualScroll') items!: T[];
+
+  static ngTemplateContextGuard<E extends object>(
+    _dir: VirtualScrollDirective<E>,
+    _ctx: unknown
+  ): _ctx is TableRowTemplateContext<E> {
+    return true;
+  }
+}