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Ilya Kantor 2020-12-05 19:38:24 +03:00
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1-js/11-async/05-promise-api/article.md
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@ -219,7 +219,7 @@ The first promise here was fastest, so it became the result. After the first set
## Promise.any
Similar to `Promise.race`, but waits only for the first fulfilled promise and gets its result. If all of the given promises are rejected, then the returned promise is rejected with [`AggregateError`](mdn:js/AggregateError).
Similar to `Promise.race`, but waits only for the first fulfilled promise and gets its result. If all of the given promises are rejected, then the returned promise is rejected with [`AggregateError`](mdn:js/AggregateError) - a special error object that stores all promise errors in its `errors` property.
The syntax is:
@ -239,6 +239,20 @@ Promise.any([
The first promise here was fastest, but it was rejected, so the second promise became the result. After the first fulfilled promise "wins the race", all further results are ignored.
Here's an example when all promises fail:
```js run
Promise.any([
new Promise((resolve, reject) => setTimeout(() => reject(new Error("Ouch!")), 1000)),
new Promise((resolve, reject) => setTimeout(() => reject(new Error("Error!")), 2000))
]).catch(error => {
console.log(error.constructor.name); // AggregateError
console.log(error.errors[0]); // Error: Ouch!
console.log(error.errors[1]); // Error: Error
});
```
As you can see, error objects for failed promises are available in the `errors` property of the `AggregateError` object.
## Promise.resolve/reject