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

Minimal async jobs utility library, with streams support

Runtime for Regenerator-compiled generator and async functions.

Fast, in memory work queue

Map over promises concurrently

`Start a promise chain

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+

A utility to retry failed async methods.

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

Simple and modern async event emitter

Full featured Promises/A+ implementation with exceptionally good performance

generator async control flow goodness

Determine if a function is a native async function.

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

A function that returns the normally hidden `AsyncFunction` constructor

A basic but performant promise implementation

Create a promise that can be canceled

Universal WHATWG Fetch API for Node, Browsers and React Native

A set of utilities that extend the use of JSON

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

Timeout a promise after a specified amount of time

Explode async and generator functions into a state machine.

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

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

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

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

A promise based streaming tokenizer

Promise queue with concurrency control

Create a deferred promise

Environment agnostic nextTick polyfill

asynchronous function queue with adjustable concurrency

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

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

Delay a promise a specified amount of time

Check if something is a promise

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

Promisify an event by waiting for it to be emitted

asynchronous function queue with adjustable concurrency

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

Isomorphic, functional type-checking for Javascript

Iterate over promises serially

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.

Filter promises concurrently

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

Memoize/cache function results

Run some code when the process exits

Distributed task scheduler and rate limiter

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

A mutex for guarding async workflows

Lock on asynchronous code

Create sync/async APIs with usable logic

Inspect the life of handle objects in node

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

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

Asynchronous bootstrapping of Node applications

Semaphore using `async` and `await`

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

Wait for a condition to be true

Compose promise-returning & async functions into a reusable pipeline

Settle an async function.

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

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

Extends Chai with assertions about promises.

Map over promises serially

Throttle promise-returning & async functions

Compose your async functions with elegance.

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

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

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

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

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

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

Run an array of functions in series

validate form asynchronous

Take care of your `spawn()`

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

`timers/promises` for client and server.

Wait for multiple callback

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.

Modular and fast Promises implementation

Memoize promise-returning & async functions

A simple asynchronous tool

Promisified setTimeout

An optionally-asynchronous forEach with an interesting interface.

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

Modern and scalable routing for React applications

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

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

Async/await wrapper for easy error handling in js

Convert any object to thenable

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

In memory queue system prioritizing tasks

The JavaScript Task Runner

Apply an async function to each Array element in series.

Wait for any promise to be fulfilled

Modern and scalable routing for React applications

Modern and scalable routing for React applications

Wait for a specified number of promises to be fulfilled

Modern and scalable routing for React applications

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

Modern and scalable routing for React applications

Abortable async function helpers

Settle promises concurrently and get their fulfillment value or rejection reason

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.

Coalesces multiple promises for the same identifier into a single request

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

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

Modern and scalable routing for Web applications

Map-like, concurrent promise processing for Node.js

YouTube IFrame Player API abstraction.

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

Make array iteration easy when using async/await and Promises

Modern and scalable routing for React applications

Parser for FTP server responses

Abstract streams to deal with the whole buffered contents.

A sane FTP client implementation for NodeJS

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

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

Resolve a path by walking parent directories.

Read the entire contents of a file.

Async/await error handling support for expressjs

Test whether a path exists on the filesystem.

Async value container

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

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

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

Add a callback to the next tick queue.

Creates a value/error pair to mimic promise behavior

call your callbacks in a waterfall, at speed

Zero-overhead asynchronous parallel/each/map function call

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

Evaluate asynchronous tasks with configurable concurrency.

Flush promises in tests

An event emitter implementation with async support in mind

Transform async/await to promise chains

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

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

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

Zero-overhead asynchronous series/each/map function calls

Loading wrapper and TypeScript types for the PayPal JS SDK

Modern and scalable routing for React applications

horsepower for your modules

Debounce promise-returning & async functions

A simple and non-blocking PNG encoder / decoder.

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

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

Tiny async loader for modern browsers

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

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

Automated browser testing for the modern web development stack.

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

Mutex locks for async functions

Asynchronous flow control with a functional taste to it

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

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

Library that can be used to retry functions that return promise

async parallellimitmethod as module.

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

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

Caching DNS resolve

Express Error Handler for Async Functions

A lightweight promise library

Simple, consistent sync or async process spawning

ES7 async-await wrapper for the csv package.

Parse ePub electronic book files with Node.JS

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

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

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

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

seriously like the best async child process library

Generic browser priority queue.

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

Asynchronous Array Utilities (for await)

A lean Promises and Async lib for ES6/ES7

Simply gzip and ungzip in Node.js with promises

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

Asynchronous iterator function for parallel processing.

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

Wrapper above react-select that supports pagination on menu scroll

Async hook

Convert event emitters and event targets to ES async iterators

co with bluebird promises

Modern and scalable routing for React applications

Retry a promise-returning or async function

Simple asynchronous middleware pattern

Better Queue for NodeJS

Test whether all promises passes a testing function

Async middleware for JavaScript and TypeScript

Cooperative multi-tasking for Javascript

zip and unzip library for node

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

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

Asynchronous String.prototype.replace()

Convert Node.js streams to streaming iterables

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

Modern and scalable routing for React applications

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

Run an array of functions in series, each passing its results to the next function (waterfall)

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.

Modern and scalable routing for React applications

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

The iterable toolbox

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

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

Higher order functions for iterators and async iterators

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.

Asynchronous IO (for Azure Open Source Projects)

Modern and scalable routing for React applications

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

Modern and scalable routing for React applications

Tiny, dependency free promisify library.

Runs Promises in a pool that limits their concurrency.

async conditional execution for async.js or standalone usage

generator async control flow goodness

Modern and scalable routing for React applications

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

multiple hash functions

Detects missing await on async function calls

Modern and scalable routing for React applications

Modern and scalable routing for React applications

Async loader for google maps api (browser, typescript)

Modern and scalable routing for React applications

Modern and scalable routing for React applications

Make an asynchronous function synchronous

Create a transform stream using await instead of callbacks

Modern and scalable routing for React applications

Modern and scalable routing for applications

A parallel, asynchronous implementation of forEach in ES6 with a configurable maximum degree of parallelism.

OpenAPI common code for Azure Tools.

Modern and scalable routing for React applications

Modern and scalable routing for React applications

Common URI handling code.

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

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

Utility to "pipe" async iterables together

Modern and scalable routing for React applications

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

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

FantasyLand compliant (monadic) alternative to Promises

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

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

Amazon S3 client for upload/download files

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