Awesome Promises !Awesome (https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg) (https://github.com/sindresorhus/awesome)

▐ A curated list of useful resources for JavaScript Promises

Inspired by the awesome (https://github.com/sindresorhus/awesome) list thing. Not to be confused with other awesome promises like "I promise you a million dollars" or "I promise you'll stay fit and never have to go to the gym again".

Table of Contents

- Resources, Blogs, and Books (#resources-blogs-and-books)
- Promises/A+ Implementations (ES6/ES2015 compatible) (#promisesa-implementations-es6es2015-compatible)
  - Strict Implementations (#strict-implementations)
  - Implementations with extras (#implementations-with-extras)
  - Fallbacks (#fallbacks)
- Convenience Utilities (#convenience-utilities)

Resources, Blogs, and Books

For beginners
⟡ Promise Cookbook (https://github.com/mattdesl/promise-cookbook) - The why, what, and how. "A brief introduction ...  primarily aimed at frontend developers".
⟡ Promises for Asynchronous Programming (http://exploringjs.com/es6/ch_promises.html) - Chapter from Exploring ES6 (http://exploringjs.com/)
⟡ You Don't Know JS: Promises (https://github.com/getify/You-Dont-Know-JS/blob/master/async%20&%20performance/ch3.md) - Chapter from You Don't Know JS: Async & Performance 
(https://github.com/getify/You-Dont-Know-JS/tree/master/async%20%26%20performance)
⟡ JavaScript Promises: an Introduction (https://developers.google.com/web/fundamentals/getting-started/primers/promises) - Basics of JavaScript's native promise implementation.
⟡ JavaScript with Promises (http://shop.oreilly.com/product/0636920032151.do) - from O'Reilly. Short and to-the-point. Uses native and bluebird.
⟡ Promise it won't hurt (https://github.com/stevekane/promise-it-wont-hurt) - An interactive nodeschool (https://nodeschool.io/) workshop
⟡ ES6 Kata Promises (http://es6katas.org/) - Promises Katas : Basics (http://tddbin.com/#?kata=es6/language/promise/basics)
⟡ ES6 Promises in Depth (https://ponyfoo.com/articles/es6-promises-in-depth)
⟡ An Incremental Tutorial on Promises (http://www.sohamkamani.com/blog/2016/08/28/incremenal-tutorial-to-promises/) - An FAQ styled tutorial for beginners.

Deep Dive
⟡ Promise Fun (https://github.com/sindresorhus/promise-fun) - @sindresorhus's notes, patterns, and solutions to common Promise problems
⟡ You're Missing the Point of Promises (https://blog.domenic.me/youre-missing-the-point-of-promises/) - Promises are much more than callback aggregation, and that jQuery's implementation (prior to 3.0) isn't enough.
⟡ We have a problem with promises (https://pouchdb.com/2015/05/18/we-have-a-problem-with-promises.html) - "Many of us are using promises without really understanding them."
⟡ Promise anti-patterns (https://github.com/petkaantonov/bluebird/wiki/Promise-anti-patterns) - Common misuses and how to avoid them.
⟡ Promise anti-patterns (2) (http://taoofcode.net/promise-anti-patterns/) - Another set of promises anti-patterns
⟡ Promise Ponderings, (Anti-)Patterns, and Apologies (https://sdgluck.github.io/2015/08/24/promise-ponderings-patterns-apologies/) - Promise behaviour demonstrated and explained by common questions and their answers.
⟡ Javascript Promises...In Wicked Detail (http://www.mattgreer.org/articles/promises-in-wicked-detail/) - Recreate the promise implementation
⟡ Writing Promise-Using Specifications (https://www.w3.org/2001/tag/doc/promises-guide) - "This document gives guidance on how to write specifications that create, accept, or manipulate promises"
⟡ Async functions - making promises friendly (https://developers.google.com/web/fundamentals/getting-started/primers/async-functions)

References
⟡ Promises/A+ specification (https://promisesaplus.com/)
⟡ caniuse promises (http://caniuse.com/#feat=promises)
⟡ Fates and States (https://github.com/domenic/promises-unwrapping/blob/master/docs/states-and-fates.md) - Quick definitions of possible states.
⟡ Promisees (https://bevacqua.github.io/promisees/) - Promise visualization playground for the adventurous.

Promises/A+ Implementations (ES6/ES2015 compatible)

Strict Implementations
These implement no more or less than the es6 spec. They make great polyfills and are exceptionally compatible with native promises.

⟡ pinkie (https://github.com/floatdrop/pinkie) - Ponyfill. Node-oriented, but browserifyable (https://github.com/substack/node-browserify). Extremely small implementation.
⟡ native-promise-only (https://github.com/getify/native-promise-only) - Polyfill. Browser and node-compatible.
⟡ es6-promise (https://github.com/stefanpenner/es6-promise) - Opt-in polyfill. A strict-spec subset of rsvp.js.
⟡ lie (https://github.com/calvinmetcalf/lie) - Small, browserifyable with an opt-in polyfill.

Implementations with extras
All of these provide more features than the language yet remain compatible. Node + Browsers for all.

⟡ bluebird (https://github.com/petkaantonov/bluebird) - Fully featured, extremely performant. Long stack traces & generator/coroutine support.
⟡ creed (https://github.com/briancavalier/creed) - Hyper performant & full featured like Bluebird, but FP-oriented. Coroutines, generators, promises, ES2015 iterables, & fantasy-land spec.
⟡ rsvp.js (https://github.com/tildeio/rsvp.js/) - Lightweight with a few extras. Compatible down to IE6!
⟡ Q (https://github.com/kriskowal/q) - One of the original implementations. Long stack traces and other goodies.
⟡ then/promise (https://github.com/then/promise) - Small with nodeify, denodify and done() additions.
⟡ when.js (https://github.com/cujojs/when) - Packed with control flow, functional, and utility methods.


Fallbacks
⟡ native-or-bluebird (https://www.npmjs.com/package/native-or-bluebird) - Helps transition to completely native.
⟡ pinkie-promise (https://github.com/floatdrop/pinkie-promise) - Use native, or fall back to pinkie. Great for node library authors.
⟡ any-promise (https://github.com/kevinbeaty/any-promise) - Loads the first available implementation. Safe for browserify.

Convenience Utilities
Native and strictly spec-compliant promises are awesome for compatibility, future-proofness, library authors, and browsers. However, libraries like bluebird patch goodies onto the Promise constructor and prototype. Solution? tiny modules of 
course!

sindresorhus's many Promise utilities (see notes (https://github.com/sindresorhus/promise-fun))
⟡ delay (https://github.com/sindresorhus/delay) - Delay a promise a specified amount of time.
⟡ pify (https://github.com/sindresorhus/pify) - Promisify ("denodify") a callback-style function.
⟡ loud-rejection (https://github.com/sindresorhus/loud-rejection) - Make unhandled promise rejections fail loudly instead of the default silent fail.
⟡ hard-rejection (https://github.com/sindresorhus/hard-rejection) - Make unhandled promise rejections fail hard right away instead of the default silent fail
⟡ p-queue (https://github.com/sindresorhus/p-queue) - Promise queue with concurrency control
⟡ p-break (https://github.com/sindresorhus/p-break) - Break out of a promise chain
⟡ p-lazy (https://github.com/sindresorhus/p-lazy) - Create a lazy promise that defers execution until .then() or .catch() is called
⟡ p-defer (https://github.com/sindresorhus/p-defer) - Create a deferred promise
⟡ p-if (https://github.com/sindresorhus/p-if) - Conditional promise chains
⟡ p-tap (https://github.com/sindresorhus/p-tap) - Tap into a promise chain without affecting its value or state
⟡ p-map (https://github.com/sindresorhus/p-map) - Map over promises concurrently
⟡ p-all (https://github.com/sindresorhus/p-all) - Run promise-returning & async functions concurrently with optional limited concurrency
⟡ p-limit (https://github.com/sindresorhus/p-limit) - Run multiple promise-returning & async functions with limited concurrency
⟡ p-times (https://github.com/sindresorhus/p-times) - Run promise-returning & async functions a specific number of times concurrently
⟡ p-catch-if (https://github.com/sindresorhus/p-catch-if) - Conditional promise catch handler
⟡ p-time (https://github.com/sindresorhus/p-time) - Measure the time a promise takes to resolve
⟡ p-log (https://github.com/sindresorhus/p-log) - Log the value/error of a promise
⟡ p-filter (https://github.com/sindresorhus/p-filter) - Filter promises concurrently
⟡ p-settle (https://github.com/sindresorhus/p-settle) - Settle promises concurrently and get their fulfillment value or rejection reason
⟡ p-memoize (https://github.com/sindresorhus/p-memoize) - Memoize promise-returning & async functions
⟡ p-whilst (https://github.com/sindresorhus/p-whilst) - Calls a function repeatedly while a condition returns true and then resolves the promise
⟡ p-throttle (https://github.com/sindresorhus/p-throttle) - Throttle promise-returning & async functions
⟡ p-debounce (https://github.com/sindresorhus/p-debounce) - Debounce promise-returning & async functions
⟡ p-retry (https://github.com/sindresorhus/p-retry) - Retry a promise-returning or async function
⟡ p-wait-for (https://github.com/sindresorhus/p-wait-for) - Wait for a condition to be true
⟡ p-timeout (https://github.com/sindresorhus/p-timeout) - Timeout a promise after a specified amount of time
⟡ p-race (https://github.com/sindresorhus/p-race) - A better Promise.race()
⟡ p-try (https://github.com/sindresorhus/p-try) - Promise#try() ponyfill - Starts a promise chain
⟡ p-finally (https://github.com/sindresorhus/p-finally) - Promise#finally() ponyfill - Invoked when the promise is settled regardless of outcome
⟡ p-any (https://github.com/sindresorhus/p-any) - Wait for any promise to be fulfilled
⟡ p-some (https://github.com/sindresorhus/p-some) - Wait for a specified number of promises to be fulfilled
⟡ p-pipe (https://github.com/sindresorhus/p-pipe) - Compose promise-returning & async functions into a reusable pipeline
⟡ p-each-series (https://github.com/sindresorhus/p-each-series) - Iterate over promises serially
⟡ p-map-series (https://github.com/sindresorhus/p-map-series) - Map over promises serially
⟡ p-reduce (https://github.com/sindresorhus/p-reduce) - Reduce a list of values using promises into a promise for a value
⟡ p-props (https://github.com/sindresorhus/p-props) - Like Promise.all() but for Map and Object

Others
⟡ promise-method (https://github.com/wbinnssmith/promise-method) - Standalone bluebird.method. Turn a synchronously-returning method into a promise-returning one.
⟡ is-promise (https://github.com/then/is-promise) - Determine if something looks like a Promise.
⟡ sprom (https://github.com/then/sprom) - Resolve when a stream ends. Optional buffering (be careful with this!)
⟡ task.js (https://github.com/mozilla/task.js) - Write async functions in a blocking style using promises and generators. Like bluebird.coroutine.
⟡ co (https://github.com/tj/co) - Like task.js and bluebird.coroutine, but supports thunks too.
⟡ lie-fs (https://www.npmjs.com/package/lie-fs) - Promise wrappers for Node's FS API.
⟡ promise-do-until (https://github.com/busterc/promise-do-until) - Calls a function repeatedly until a condition returns true and then resolves the promise.
⟡ promise-do-whilst (https://github.com/busterc/promise-do-whilst) - Calls a function repeatedly while a condition returns true and then resolves the promise.
⟡ promise-semaphore (https://github.com/samccone/promise-semaphore) - Push a set of work to be done in a configurable serial fashion
⟡ promise-nodeify (https://github.com/kevinoid/promise-nodeify) - Standalone nodeify method which calls a Node-style callback on resolution or rejection.

License
Licensed under the Creative Commons CC0 License (https://creativecommons.org/publicdomain/zero/1.0/).

promises Github: https://github.com/wbinnssmith/awesome-promises