rxjs-log

rxjs-log.ts

const source = of('World');

// with tap
source.pipe(
  tap(x => console.log(x))
).subscribe(x => {
  this.doSomething(x);
});

// with map
source.pipe(
  map(x => {
    console.log(x);
    return x;
  })
).subscribe(x => {
  this.doSomething(x);
});

// within the 'next' callback - bonus: log errors too
source.subscribe(x => {
  console.log(x);
  this.doSomething(x);
}, err => console.error(err));