aggregate-error

Create an error from multiple errors

Note: With Node.js 15, there's now a built-in AggregateError type.

Install

npm install aggregate-error

Usage

import AggregateError from 'aggregate-error';

const error = new AggregateError([new Error('foo'), 'bar', {message: 'baz'}]);

throw error;
/*
AggregateError:
    Error: foo
        at Object.<anonymous> (/Users/sindresorhus/dev/aggregate-error/example.js:3:33)
    Error: bar
        at Object.<anonymous> (/Users/sindresorhus/dev/aggregate-error/example.js:3:13)
    Error: baz
        at Object.<anonymous> (/Users/sindresorhus/dev/aggregate-error/example.js:3:13)
    at AggregateError (/Users/sindresorhus/dev/aggregate-error/index.js:19:3)
    at Object.<anonymous> (/Users/sindresorhus/dev/aggregate-error/example.js:3:13)
    at Module._compile (module.js:556:32)
    at Object.Module._extensions..js (module.js:565:10)
    at Module.load (module.js:473:32)
    at tryModuleLoad (module.js:432:12)
    at Function.Module._load (module.js:424:3)
    at Module.runMain (module.js:590:10)
    at run (bootstrap_node.js:394:7)
    at startup (bootstrap_node.js:149:9)
*/

for (const individualError of error.errors) {
    console.log(individualError);
}
//=> [Error: foo]
//=> [Error: bar]
//=> [Error: baz]

API

AggregateError(errors)

Returns an Error.

errors

Type: Array<Error|object|string>

If a string, a new Error is created with the string as the error message.
If a non-Error object, a new Error is created with all properties from the object copied over.