JSPM

Run multiple promise-returning & async functions with limited concurrency

Get the first fulfilled promise that satisfies the provided testing function

Higher-order functions and common patterns for asynchronous code

Promisify a callback-style function

Runtime for Regenerator-compiled generator and async functions.

Fast, in memory work queue

Minimal async jobs utility library, with streams support

`Start a promise chain

Map over promises concurrently

Run an array of functions in parallel

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

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

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

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

Full featured Promises/A+ implementation with exceptionally good performance

Simple and modern async event emitter

generator async control flow goodness

Explode async and generator functions into a state machine.

A utility to retry failed async methods.

Determine if a function is a native async function.

Create a promise that can be canceled

Universal WHATWG Fetch API for Node, Browsers and React Native

A basic but performant promise implementation

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

Retry a promise-returning or async function

A set of utilities that extend the use of JSON

Timeout a promise after a specified amount of time

A function that returns the normally hidden `AsyncFunction` constructor

FTP client for Node.js, supports FTPS over TLS, IPv6, Async/Await, and Typescript.

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

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

asynchronous function queue with adjustable concurrency

Create a deferred promise

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

Contain async insanity so that the dark pony lord doesn't eat souls

Environment agnostic nextTick polyfill

Promise queue with concurrency control

Reduce a list of values using promises into a promise for a value

Check if something is a promise

A promise based streaming tokenizer

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

Delay a promise a specified amount of time

Promisify an event by waiting for it to be emitted

asynchronous function queue with adjustable concurrency

Iterate over promises serially

Isomorphic, functional type-checking for Javascript

Filter promises concurrently

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.

Memoize/cache function results

Big-friendly JSON. Asynchronous streaming functions for large JSON data sets.

Convert a string/promise/array/iterable/asynciterable/buffer/typedarray/arraybuffer/object into a stream

A tiny, zero-dependency yet spec-compliant asynchronous iterator polyfill/ponyfill for ReadableStreams.

Lock on asynchronous code

Distributed task scheduler and rate limiter

Run some code when the process exits

Inspect the life of handle objects in node

A mutex for guarding async workflows

Map over an array or object of values in parallel or series, passing each through the async iterator, with optional lifecycle hooks.

Asynchronous bootstrapping of Node applications

`net.Server#listen()` helper that returns a Promise for async / await

Map over promises serially

Compose promise-returning & async functions into a reusable pipeline

Run multiple promise-returning & async functions with limited concurrency using native ES9

Semaphore using `async` and `await`

Settle an async function.

`AsyncIterator.prototype`, or a shared object to use.

A Promise-based interface into processes created by child_process.spawn

Create sync/async APIs with usable logic

Native Promise Only: A polyfill for native ES6 Promises **only**, nothing else.

Run promise-returning & async functions concurrently with optional limited concurrency

Allows libraries to handle various caller provided asynchronous functions uniformly. Maps promises, observables, child processes and streams, and callbacks to callback style.

Throttle promise-returning & async functions

Wait for a condition to be true

Run some code when the process exits (supports async hooks and pm2 clustering)

Compose your async functions with elegance.

Extends Chai with assertions about promises.

Run promise-returning & async functions in series, each passing its result to the next

Watch globs and execute a function upon change, with intelligent defaults for debouncing and queueing.

validate form asynchronous

Take care of your `spawn()`

Wait for multiple callback

An optionally-asynchronous forEach with an interesting interface.

Run an array of functions in series

Memoize promise-returning & async functions

Async module-loading library and protocol for bundlers/loaders targeting isomorphic apps and Node.js.

A lightweight Promises/A+ and when() implementation, plus other async goodies.

Modular and fast Promises implementation

Run an array of functions in parallel, but limit the number of tasks executing at the same time

The scrypt password-based key derivation function with sync and cancellable async.

A simple asynchronous tool

`timers/promises` for client and server.

Promisified setTimeout

Convert any object to thenable

In memory queue system prioritizing tasks

A node- and browser-ready async (now with promises) counterpart of Array.prototype.forEach

Runs a list of async tasks, passing the results of each into the next one

The JavaScript Task Runner

Coalesces multiple promises for the same identifier into a single request

Apply an async function to each Array element in series.

Wait for any promise to be fulfilled

Settle promises concurrently and get their fulfillment value or rejection reason

Async/await wrapper for easy error handling in js

Wait for expectation to be true, useful for integration and end to end testing

Make a promise always fulfill with its actual fulfillment value or rejection reason

Wait for a specified number of promises to be fulfilled

Modern and scalable routing for React applications

support for asynchronous development with a Promise based task Scheduler, several different Promise implementations (synchronous, idle, asynchronous and native runtime wrappers), await helpers, and aliases all built and tested using TypeScript.

Oboe.js reads json, giving you the objects as they are found without waiting for the stream to finish

Map-like, concurrent promise processing for Node.js

Resolve a path by walking parent directories.

Turns async function into sync via JavaScript wrapper of Node event loop

Make array iteration easy when using async/await and Promises

YouTube IFrame Player API abstraction.

Async/await error handling support for expressjs

Test whether a path exists on the filesystem.

Abstract streams to deal with the whole buffered contents.

Modern and scalable routing for React applications

Read the entire contents of a file.

Parser for FTP server responses

Bundle results of async functions calls into one callback with all the results

Node.js test runner that lets you develop with confidence.

A sane FTP client implementation for NodeJS

Add a callback to the next tick queue.

Creates a value/error pair to mimic promise behavior

Transform async/await to promise chains

The fastest key/value storage for React Native. ~30x faster than AsyncStorage! Works on Android, iOS and Web.

Get the arguments of a function, arrow function, generator function, async function

Modern and scalable routing for React applications

Async value container

An implementation of Domain-like error handling, built on async_hooks

Flush promises in tests

async.mapLimit's functionality available as a standalone npm module

Modern and scalable routing for React applications

RxJS based middleware for Redux. Compose and cancel async actions and more.

Automagically generates command-line interfaces (CLI) for any module. Expected options and help sections are created automatically based on parameters names, with support to async. It can be installed globally, in order to *execute* any module, or .js fil

Zip/Tar a complete folder or a glob list into a zip/tgz file

Modern and scalable routing for React applications

Evaluate asynchronous tasks with configurable concurrency.

Zero-overhead asynchronous parallel/each/map function call

Automated browser testing for the modern web development stack.

Cancelable Async Flows: a wrapper to treat generators as cancelable async functions

Make bluebird work with the continuation-local-storage module.

Just like EventEmitter, but with support for callbacks and interuption of the listener-chain

Tiny async loader for modern browsers

Modern version of setInterval for promises and async functions available in Node.js and browsers.

Caching DNS resolve

async parallellimitmethod as module.

A simple and non-blocking PNG encoder / decoder.

Abortable async function helpers

Maintained fork of later. Determine later (or previous) occurrences of recurring schedules

Zero-overhead asynchronous series/each/map function calls

Loading wrapper and TypeScript types for the PayPal JS SDK

call your callbacks in a waterfall, at speed

An event emitter implementation with async support in mind

Modern and scalable routing for React applications

ES7 async-await wrapper for the csv package.

A module for sequencing and executing tasks and dependencies in maximum concurrency

Asynchronous flow control with a functional taste to it

SQLite client for Node.js applications with SQL-based migrations API written in Typescript

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

Simple, consistent sync or async process spawning

A plugin for the Acorn parser that understands the ES7 keywords async and await

Library that can be used to retry functions that return promise

Async middleware for JavaScript and TypeScript

Modern and scalable routing for React applications

The next generation of events handling for javascript! New: abstract away the network!

horsepower for your modules

Asynchronous Array Utilities (for await)

A lightweight promise library

Express Error Handler for Async Functions

Promisify any of: callback function, sync function, generator function, promise-returning function

Simply gzip and ungzip in Node.js with promises

Modern and scalable routing for Web applications

Parse a function into an object using espree, acorn or babylon parsers. Extensible through Smart Plugins

Test whether all promises passes a testing function

Debounce promise-returning & async functions

With Bruno CLI, you can now run your API collections with ease using simple command line commands.

A lean Promises and Async lib for ES6/ES7

Create a lazy promise that defers execution until it's awaited or when `.then()`, `.catch()`, or `.finally()` is called

Wrapper above react-select that supports pagination on menu scroll

Mutex locks for async functions

Cooperative multi-tasking for Javascript

Parse ePub electronic book files with Node.JS

co with bluebird promises

Async hook

Chainable asynchronous flow control with sequential and parallel primitives and pipeline-style error handling

Pipe functions in a Unix-like style. It supports Promises (async) anywhere in the pipeline and every step will be executed sequentially. The return (resolve in case of Promises) of each function will be passed in as an argument to the next one

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

zip and unzip library for node

Checks whether a command line command exists in the current environment.

Better Queue for NodeJS

Asynchronous iterator function for parallel processing.

Retry a promise-returning or async function

Generic browser priority queue.

Tiny, dependency free promisify library.

Waits until the given predicate function returns a truthy value, then resolves

A lightweight Deferred implementation, on top of Promises/A+

Convert Node.js streams to streaming iterables

CLI Simple, Stupid. Automatic discovery of parameters names. Provides an easy and minimal setup by passing in only a function reference without the need of declaring all expected options names or create a help section by hand. Support to sync / async. Sup

Simple asynchronous middleware pattern

Async array reduce. Asynchronously applies a function against an accumulator and each element in an array (from left to right, in series) to reduce it to a single value.

`Promise.all` and `Promise.allSettled` with concurrency option and async iterable result

seriously like the best async child process library

Enables simple, yet robust handling of async action creators in Redux

async conditional execution for async.js or standalone usage

Convert event emitters and event targets to ES async iterators

Asynchronous String.prototype.replace()

DOM Promise and Promises/A+ implementation for Node.js and browsers

A tiny version of Golang's WaitGroup with typings, promises, and zero dependencies.

Modern and scalable routing for React applications

Asynchronous IO (for Azure Open Source Projects)

LazyLoad is a lightweight (2.4 kB) and flexible script that speeds up your web application by deferring the loading of your below-the-fold images, videos and iframes to when they will enter the viewport. It's written in plain "vanilla" JavaScript, it leve

Higher order functions for iterators and async iterators

Ambi lets you execute any function ambidextrously; providing you the ability to execute any function (be it synchronous, asynchronous, returns, callbacks, promises) as if it returned a promise.

multiple hash functions

Promise wrapper over MQTT.js

An asynchronous yieldable version of JSON.stringify and JSON.parse

Light-weight Fetch implementation transparently supporting both HTTP/1(.1) and HTTP/2

Async loader for google maps api (browser, typescript)

Amazon S3 client for upload/download files

Create a transform stream using await instead of callbacks

Detects missing await on async function calls

Utility to "pipe" async iterables together

StreamQueue pipe the queued streams one by one in order to preserve their content order.

Enhances html-webpack-plugin functionality with async and defer attributes for script elements

Runs Promises in a pool that limits their concurrency.

A little retry tool to execute a function until the function is successful. Can also bind a timeout to a function. This lib is usable in typescript, in javascript, in node, in SPA tools (rest, Vue, Svelte...) and browser (available in ESM and common js fo

Run promise-returning & async functions in series

Modern and scalable routing for React applications

function try-catch wrapper for promises

Async npm module for Node JS that reads the first line of a file

A module for batching individual promises to improve their collective efficiency.

React hooks for RxJS Observables. Simple, flexible, testable and performant.

Convert a Cypress chain into a promise for use with async/await

Group together synchronous and asynchronous tasks and execute them with support for concurrency, naming, and nesting.

Create a duplex stream from a readable and a writable stream.

FantasyLand compliant (monadic) alternative to Promises

A Node.js queue library with controllable concurrency and rate limiting

Asynchronously calls a function on each element in an array in parallel.

jQuery style Deferreds

Streaming length prefixed buffers with async iterables

A readable async stream which can be iterated over using a for-await-of loop.

A module for managing ES6 promise concurrency, frequency, and efficiency.

Modern and scalable routing for React applications

A simple implementation of async.parallel

Modern and scalable routing for React applications

Asynchronous side effects, without the nonsense

A small embeddable Promise polyfill

Helper for memoizing async functions and methods

Read an exact number of bytes from a binary (async) iterable