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Discussion on: Observables are promises on steroids

andywer profile image
Andy Wermke

That doesn't make much sense. Why would you want to emit a new cancellation function for every new value?

You shouldn't have this non-standard custom cancellation approach when there is already a standardized one (observable.subscribe(), subscription.unsubscribe()). Keep in mind that emitting functions is generally considered to be an anti-pattern.

Maybe the observable-fns readme lacks a link to some documentation about observables in general… I guess this is one of your first times using observables? (No offense – I'm seriously interested :) )

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patarapolw profile image
Pacharapol Withayasakpunt Author

Yes. Only promises and eventemitters.

Should I start with RxJS?

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andywer profile image
Andy Wermke

Yeah, maybe that's the best to get started. You should definitely start with RxJS's documentation – it's pretty good!

Which library you then use doesn't really matter too much as their APIs are very similar to almost identical.

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patarapolw profile image
Pacharapol Withayasakpunt Author

const terminateSubscription = () =>

Do you actually mean

new Observable((obs) => {
  return terminateSubscription
  // I actually use
  // return () => { isUnsubscribed = true }
})
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andywer profile image
Andy Wermke

Yes, my bad! I updated my code sample accordingly.

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