Don't understand the result of Promise API

Asked Oct 13 '16 at 18:10

Active Oct 13 '16 at 18:11

Viewed 19 times

I'm trying to get my head around the Promise API, and struggling.

This is what I've tried so far:

const myPromise = () => {
   return new Promise( (resolve, reject) => {
      var name = 'John'
      if (name === 'John') {
         resolve(name)
      }
      else reject('Anonymous')
   })
}

Then when I console.log(myPromise()), I get...

Promise {[[PromiseStatus]]: "resolved", [[PromiseValue]]: "John"}

I would expect to get John back from this. As it stands, I don't know how to handle the data. Can anyone point out where I'm going wrong?

edited Oct 13 '16 at 18:11

Daniel A. White

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asked Oct 13 '16 at 18:10

Paulos3000

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1

you can't block a call in javascript. – Daniel A. White Oct 13 '16 at 18:11
1

I don't know what that means. Can you explain? – Paulos3000 Oct 13 '16 at 18:12
1

meaning once you go async, you can't go back. – Daniel A. White Oct 13 '16 at 18:12
1

'Go back'? Sorry this is all new territory for me, would appreciate if you can give a bit more detail? – Paulos3000 Oct 13 '16 at 18:13
1

a promise represents the *eventual* result of an async operation, not the result itself. – Daniel A. White Oct 13 '16 at 18:14
You have to wait for the response, right? You wanna do something like `myFunc().then(successFunction(response){ // do stuff}, errorFunction(err){// do stuff})` – Jeremy Jackson Oct 13 '16 at 18:16
You want `myPromise.then(console.log)`. Returning a promise from a function will return a promise object, not make the function magically wait until the promise settles. – Bergi Oct 13 '16 at 18:16

Don't understand the result of Promise API

0 Answers0