Async

Get the first fulfilled promise that satisfies the provided testing function

Run multiple promise-returning & async functions with limited concurrency

Promisify a callback-style function

Higher-order functions and common patterns for asynchronous code

`Start a promise chain

Runtime for Regenerator-compiled generator and async functions.

Map over promises concurrently

Add callbacks to requests in flight to avoid async duplication

JavaScript parser, mangler/compressor and beautifier toolkit for ES6+

Minimal async jobs utility library, with streams support

Offers a async require.resolve function. It's highly configurable.

Full featured Promises/A+ implementation with exceptionally good performance

Run an array of functions in parallel

Fast, in memory work queue

Allows users to use generators in order to write common functions that can be both sync or async.

`Promise#finally()` ponyfill - Invoked when the promise is settled regardless of outcome

Allow parsing of async generator functions

Turn async generator functions into ES2015 generators

Neo-Async is a drop-in replacement for Async, it almost fully covers its functionality and runs faster

generator async control flow goodness

Helper function to remap async functions to generators

Explode async and generator functions into a state machine.

Turn async functions into ES2015 generators

Explode async and generator functions into a state machine.

Simple and modern async event emitter

Create a promise that can be canceled

Utility method to run function either synchronously or asynchronously using the common `this.async()` style.

Turn a writable and readable stream into a streams2 duplex stream with support for async initialization and streams1/streams2 input

A library for promises (CommonJS/Promises/A,B,D)

One promise for multiple requests in flight to avoid async duplication

Timeout a promise after a specified amount of time

Retry a promise-returning or async function

dead-simple optimistic async helper

No-bullshit, ultra-simple, 35-lines-of-code async parallel forEach / map function for JavaScript.

Simple async batch with concurrency control and progress reporting.

Environment agnostic nextTick polyfill

A feature-rich Node.js event emitter implementation with namespaces, wildcards, TTL, async listeners and browser/worker support.

asynchronous function queue with adjustable concurrency

Universal WHATWG Fetch API for Node, Browsers and React Native

delay the evaluation of a paramless async function and cache the result

Promisify an event by waiting for it to be emitted

Create a deferred promise

A set of utilities that extend the use of JSON

Iterate over promises serially

elegant & feature rich browser / node HTTP with a fluent API

A basic but performant promise implementation

Check if something is a promise

fs.readdir with sync, async, and streaming APIs + filtering, recursion, absolute paths, etc.

rawStream.pipe(JSONStream.parse()).pipe(streamOfObjects)

Write data to a file, replacing the file if it already exists and creating any intermediate directories if they don't already exist. Thin wrapper around node's native fs methods.