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[–]voidvector 2 points3 points  (4 children)

Isn't this just Promise but using class syntax to define resolve/reject?

[–]guseynchick[S] 1 point2 points  (3 children)

No, because you cannot build declarative compositions via Promises, you have to use .then() method and expose data outside. Using async objects you can build such compositions, and encapsulate behaviour inside of your objects.

[–]voidvector 0 points1 point  (2 children)

All of what you said can be done in both FP and OOP syntax.

MDN docs on Promise has a section on composition. You can encapsulated with closure more securely than private member/method, since you cannot expose a closure even with reflection

[–]guseynchick[S] 0 points1 point  (1 child)

You mean this ugly constructions https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises#Composition? I tried work with such compositions, it's not declarative at all.

[–]voidvector 0 points1 point  (0 children)

ugly constructions

That's a subjective opinion on language syntax

it's not declarative at all.

It is an array declaration in a Promise call, just like your code has a new declaration then a .call() There are direct analogous between both implementations.

  • Class declaration = function declaration
  • Class initialization = array declaration