Content: Issue with "Promise.race()": …

Created on 24 Jan 2021 · 3Comments · Source: mdn/content

MDN URL: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/race

What information was incorrect, unhelpful, or incomplete?

The example does not display the difference with Promise.any()

Specific section or headline?

The example

What did you expect to see?

The difference with Promise.any()

I suggest to put this example for Promise.race():

`
const promise1 = new Promise((resolve, reject) => {
setTimeout(resolve, 500, 'one');
});

const promise2 = new Promise((resolve, reject) => {
setTimeout(reject, 100, 'two');
});

Promise.race([promise1, promise2]).then((value) => {
console.log('succeeded with value:', value);
}).catch((reason) => {
console.log('failed with reason:', reason);
// Only promise1 is fulfilled, but promise2 is faster
});
// expected output: "failed with reason: two"
`

And this example for Promise.any():

`
const promise1 = new Promise((resolve, reject) => {
setTimeout(resolve, 500, 'one');
});

const promise2 = new Promise((resolve, reject) => {
setTimeout(reject, 100, 'two');
});

Promise.any([promise1, promise2]).then((value) => {
console.log('succeeded with value:', value);
// Only promise1 is fulfilled, even though promise2 settled sooner
}).catch((reason) => {
console.log('failed with reason:', reason);
});
// expected output: "succeeded with value: one"
`