AggregateError: No Promise in Promise.any was resolved

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Message#
Error type#
What went wrong?#
Examples#
Empty iterable#
Handling all rejections#
See also#

The JavaScript exception "No Promise in Promise.any was resolved" occurs when all promises passed to {{jsxref("Promise.any()")}} are rejected. It is the only built-in usage of {{jsxref("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 {{jsxref("AggregateError/errors", "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#

Promise.any([]).catch((error) => {
  console.error(error); // AggregateError: No Promise in Promise.any was resolved
});

Handling all rejections#

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);
    }
  }
}