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Bluebird is a fully featured promise library with focus on innovative features and performance

See the bluebird website for further documentation, references and instructions. See the API reference here.

For bluebird 2.x documentation and files, see the 2.x tree.

Please use native promises instead if at all possible. Native Promises have been stable in Node.js and browsers for around 10 years now and they have been fast for around 7. Any utility bluebird has like .map has native equivalents (like Node streams' .map).

This is a good thing, the people working on Bluebird and promises have been able to help incorporate most of the useful things from Bluebird into JavaScript itself and platforms/engines.

If there is a feature that keeps you using bluebird. Please let us know so we can try and upstream it :)

Currently - it is only recommended to use Bluebird if you need to support really old browsers or EoL Node.js or as an intermediate step to use warnings/monitoring to find bugs.

The github issue tracker is only for bug reports and feature requests. Anything else, such as questions for help in using the library, should be posted in StackOverflow under tags promise and bluebird.

Thanks to BrowserStack for providing us with a free account which lets us support old browsers like IE8.

The MIT License (MIT)

Copyright (c) 2013-2021 Petka Antonov

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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