Added Edit + Create comment funtionality

src/app/directives/ng-let-directive.ts

@@ -0,0 +1,34 @@
+import {
+  Directive,
+  Input,
+  OnInit,
+  TemplateRef,
+  ViewContainerRef
+} from '@angular/core';
+
+export class NgLetContext {
+  $implicit: any = undefined;
+  ngLet: any = undefined;
+}
+
+@Directive({
+  // tslint:disable-next-line:directive-selector
+  selector: '[ngLet]'
+})
+export class NgLetDirective implements OnInit {
+  private readonly _context = new NgLetContext();
+
+  @Input()
+  set ngLet(value: any) {
+    this._context.$implicit = this._context.ngLet = value;
+  }
+
+  constructor(
+    private readonly _vcr: ViewContainerRef,
+    private readonly _templateRef: TemplateRef<NgLetContext>
+  ) { }
+
+  ngOnInit(): void {
+    this._vcr.createEmbeddedView(this._templateRef, this._context);
+  }
+}