wamr-104.ts

import { Observable } from 'rxjs';
import { delay, retryWhen } from 'rxjs/operators';

observable
  .pipe(
    retryWhen(errors => errors.
      pipe(
        delay(2500)
      )
    )
  )
  .subscribe({
    next: x => console.log(`${x} received`),
    complete: () => console.log('Completed'),
    error: err => console.warn(err)
  });