CODEWITHSUNDEEP
rxjsangular2-http
benji
benji

Reputation: 2451

Observable finally not getting fired

This works:

this.http.get('/doesntexist1')
  .finally(() => console.log('finally1'))
  .subscribe(() => { });

But this doesn't:

const obs = this.http.get('/doesntexist2');
obs.finally(() => console.log('finally2'))
obs.subscribe(() => { });

Both URL produce a 404.

I run both and I only see "finally1" being displayed in the console, any idea why?

Upvotes: 2

Views: 1651

Answers (1)

bygrace
bygrace

Reputation: 5988

The difference is that in the second example the .finally is not in the same stream as the .subscribe since you aren't chaining them.

Your first example creates this stream:

get -> finally -> subscribe

Your second example creates two branches:

get -> finally
get -> subscribe

The finally wont be executed without a subscription after it.

If you want to build a stream then you need to chain the operators by using the result of the previous operator. It isn't like an in-place operator.

Upvotes: 9

Related Questions