AggregateError: No Promise in Promise.any was resolved
The JavaScript exception "No Promise in Promise.any was resolved" occurs when all promises passed to Promise.any()
are rejected. It is the only built-in usage of AggregateError
.
Message
AggregateError: All promises were rejected (V8-based) AggregateError: No Promise in Promise.any was resolved (Firefox) AggregateError (Safari)
Error type
What went wrong?
Promise.any()
only rejects when all promises passed to it are rejected. You should access errors
to get the array of rejection reasons. See Using promises for more information on how to handle asynchronously rejected promises. This error is also raised when Promise.any()
receives an empty iterable.
Examples
Empty iterable
js
Promise.any([]).catch((error) => {
console.error(error); // AggregateError: No Promise in Promise.any was resolved
});
Handling all rejections
js
const promises = [
fetch("/data-location1"),
fetch("/data-location1"),
fetch("/data-location1"),
];
Promise.any(promises)
.then((value) => console.log(value))
.catch((error) => {
// None of the fetches were successful
for (const e of error.errors) {
console.error(e);
}
});
// Using await
async function fetchFirstSuccessful() {
try {
const value = await Promise.any(promises);
console.log(value);
} catch (error) {
for (const e of error.errors) {
console.error(e);
}
}
}