AggregateError

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2020.

* Some parts of this feature may have varying levels of support.

The AggregateError object represents an error when several errors need to be wrapped in a single error. It is thrown when multiple errors need to be reported by an operation, for example by Promise.any(), when all promises passed to it reject.

AggregateError is a subclass of Error.

Constructor

AggregateError()

Creates a new AggregateError object.

Instance properties

Also inherits instance properties from its parent Error.

These properties are defined on AggregateError.prototype and shared by all AggregateError instances.

AggregateError.prototype.constructor

The constructor function that created the instance object. For AggregateError instances, the initial value is the AggregateError constructor.

AggregateError.prototype.name

Represents the name for the type of error. For AggregateError.prototype.name, the initial value is "AggregateError".

These properties are own properties of each AggregateError instance.

errors

An array representing the errors that were aggregated.

Instance methods

Inherits instance methods from its parent Error.

Examples

Catching an AggregateError

js
Promise.any([Promise.reject(new Error("some error"))]).catch((e) => {
  console.log(e instanceof AggregateError); // true
  console.log(e.message); // "All Promises rejected"
  console.log(e.name); // "AggregateError"
  console.log(e.errors); // [ Error: "some error" ]
});

Creating an AggregateError

js
try {
  throw new AggregateError([new Error("some error")], "Hello");
} catch (e) {
  console.log(e instanceof AggregateError); // true
  console.log(e.message); // "Hello"
  console.log(e.name); // "AggregateError"
  console.log(e.errors); // [ Error: "some error" ]
}

Specifications

Specification
ECMAScript® 2025 Language Specification
# sec-aggregate-error-objects

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
AggregateError
AggregateError() constructor
errors
AggregateError is serializable

Legend

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Full support
Full support
No support
No support
See implementation notes.

See also