gns3-web-ui/src/main.ts

import '@angular/compiler';
import { ApplicationRef, enableProdMode } from '@angular/core';
import { enableDebugTools } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/app.module';
import { environment } from './environments/environment';

if (environment.production) {
  enableProdMode();
}

platformBrowserDynamic()
  .bootstrapModule(AppModule)
  .then((moduleRef) => {
    const applicationRef = moduleRef.injector.get(ApplicationRef);
    const componentRef = applicationRef.components[0];
    // allows to run `ng.profiler.timeChangeDetection();`
    enableDebugTools(componentRef);
  })
  .catch((err) => console.log(err));