Property 'catch' does not exist on type 'Observable'

Question

On the Angular 2 documentation page for using the Http service, there is an example.

getHeroes (): Observable {
  return this.http.get(this.ur         


        

Answer 1

In angular 8:
for catch:
import { catchError } from 'rxjs/operators';

for throw:
import { Observable, throwError } from 'rxjs';

and code should be written like this.

getEmployees(): Observable {
    return this.http.get(this.url).pipe(catchError(this.erroHandler));
  }

  erroHandler(error: HttpErrorResponse) {
    return throwError(error.message || 'server Error');
  }