Improve

src/app/services/dom/wait-for-dom.service.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { WaitForDomService } from './wait-for-dom.service';
+
+describe('WaitForDomService', () => {
+  let service: WaitForDomService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(WaitForDomService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

src/app/services/dom/wait-for-dom.service.ts

@@ -0,0 +1,24 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class WaitForDomService {
+
+  selectorString = ""
+  constructor() { }
+
+  selector({ selector, callback }) {
+
+    function _try() {
+      if (!document.querySelector(selector)) {
+        window.requestAnimationFrame(_try);
+      } else {
+        callback()
+      }
+    };
+
+    _try()
+
+  }
+}