what-is-javascript-promise/

[utterances-bot]

What is a Promise in JavaScript?

The post that I had wanted to read myself to understand promises.

https://dmitripavlutin.com/what-is-javascript-promise/

[blessedneelesh]

Marvellous

[salesh]

As always nice post Dmitri!

[kausar128]

Wonderful simplification.

[popiang]

Thanks for the very good explanation..:)

[panzerdp]

As always nice post Dmitri!

Thanks @salesh!

[panzerdp]

Thanks for the very good explanation..:)

You're welcome @popiang!

[ohjuny]

Thank you for another fantastic article! Just wondering if anyone has an answer to the "challenge" at the bottom of the article?

[icanhazsoulz]

promise.then(fn1, fn2) promise.then(fn1).catch(fn2)

The second variant will process a reject result of fn1, if any, while the first one won't.

[pboto]

Very clear and very well written, Dimitri. Thanks a lot.

[panzerdp]

Very clear and very well written, Dimitri. Thanks a lot.

You're welcome Paulo @pboto!

[AlexandreSherozia]

Thanks a lot Dimitri, for this great explanation!

[panzerdp]

Thanks a lot Dimitri, for this great explanation!

@AlexandreSherozia Glad you like it Alexandre!

[shivam3596]

4.1 await-ing promise value

resolve has missing closing ')' bracket

function getList() {
  return new Promise(resolve => {
    setTimeout(() => resolve(['Joker', 'Batman'], 1000);
  });
}

it should be

function getList() {
  return new Promise(resolve => {
    setTimeout(() => resolve(['Joker', 'Batman']), 1000);
  });
}

[WORMSS]

Just as an alternative to times you want to 'fake' a delay... you can do a syntax like this

function getList() {
  return new Promise(resolve => setTimeout(resolve, 1000, ['Joker', 'Batman']));
}

Any arguments passed into setTimout after the duration becomes arguments for the settimeout callback

[panzerdp]

Just as an alternative to times you want to 'fake' a delay... you can do a syntax like this

function getList() {
  return new Promise(resolve => setTimeout(resolve, 1000, ['Joker', 'Batman']));
}

Any arguments passed into setTimout after the duration becomes arguments for the settimeout callback

Good idea @WORMSS! Thanks for sharing.

[panzerdp]

4.1 await-ing promise value resolve has missing closing ')' bracket

Thanks @shivam3596. Fixed.

[annasudol]

amazing !

[panzerdp]

@annasudol Thanks!