Decoded Frontend Angular Interview Hacking ((link)) -

data$ = this.http.get('/api/data').pipe( // The hack: switchMap to a timer that resets on new request switchMap(initialData => timer(0, 10000).pipe( switchMap(() => this.http.get('/api/data')), // Catch errors to keep the stream alive catchError(err => of( error: err.message )) )) );

Too clean.

Modern Angular architecture patterns that remove the need for traditional NgModules . decoded frontend angular interview hacking

Know that Zone.js is what triggers change detection automatically and how to run code "outside" of Angular using NgZone.runOutsideAngular() for performance-heavy tasks. 3. RxJS & State Management data$ = this