JSPM

Run multiple promise-returning & async functions with limited concurrency

Get the first fulfilled promise that satisfies the provided testing function

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

Promisify a callback-style function

Higher-order functions and common patterns for asynchronous code

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

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

Async loader for google maps api (browser, typescript)

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

`Start a promise chain

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

Run an array of functions in parallel

Simple async iterables for websocket client connections

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

A utility to retry failed async methods.

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.

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

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

Timeout a promise after a specified amount of time

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

Async/await error handling support for expressjs

Explode async and generator functions into a state machine.

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

FantasyLand compliant (monadic) alternative to Promises

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

Concat all buffers/strings yielded from an async iterable into a single BufferList/string

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

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

A tiny script to run async functions aka promises one after the other

Promise queue with concurrency control

Create a deferred promise

Environment agnostic nextTick polyfill

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

asynchronous function queue with adjustable concurrency

A lightweight TypeScript/JavaScript adapter for working with Flatfile's Portal

Asynchronous flow control with a functional taste to it

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

asynchronous function queue with adjustable concurrency

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

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

Isomorphic, functional type-checking for Javascript

Create handshakes for binary protocols with iterable streams

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

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

Run some code when the process exits

Memoize/cache function results

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

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

Inspect the life of handle objects in node

$(document).ready() for the 21st century

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

Semaphore using `async` and `await`

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

A JavaScript extension package for building strong and modern applications.

Wait for a condition to be true

Compose promise-returning & async functions into a reusable pipeline

Settle an async function.

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

An easy way to run reliable polling without messing with setTimeout.

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

Extends Chai with assertions about promises.

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

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.

`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

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

validate form asynchronous

Take care of your `spawn()`

`timers/promises` for client and server.

Wait for multiple callback

Create the powerful singleton easily

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

Async file and script loader that works both in the browser and in nodejs / io.js.

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

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

In memory queue system prioritizing tasks

Convert any object to thenable

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

The JavaScript Task Runner

Apply an async function to each Array element in series.

Translate text to different languages on node.js and the browser

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

Creates a queue of sync or async functions with resolve and reject callback.

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

Run a script that exports an `async` function

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

Modern and scalable routing for Web applications

Map-like, concurrent promise processing for Node.js

Parser for FTP server responses

YouTube IFrame Player API abstraction.

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

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

Abstract streams to deal with the whole buffered contents.

A sane FTP client implementation for NodeJS

Resolve a path by walking parent directories.

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

Read the entire contents of a file.

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

Test whether a path exists on the filesystem.

Async value container

Zero-overhead asynchronous parallel/each/map function call

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

Add a callback to the next tick queue.

Creates a value/error pair to mimic promise behavior

Lightweight promise/generator machinery.

call your callbacks in a waterfall, at speed

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

Modern and scalable routing for React applications

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

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

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.

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

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

Dynamic scripts loading for modern browsers.

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!

jsonp minimal client for the browser (1.4K) and Node.js

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

Caching DNS resolve

Express Error Handler for Async Functions

Programmatically Loads remote scripts via script tag

A lightweight promise library

Generic browser priority queue.

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)

seriously like the best async child process library

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

Simply gzip and ungzip in Node.js with promises

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

Asynchronous Array Utilities (for await)

A Svelte action that monitors an element enters or leaves the viewport or a parent element. Performant and efficient thanks to using Intersection Observer under the hood.

A lean Promises and Async lib for ES6/ES7

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

Async hook

ES6 Promise polyfill

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

Convert event emitters and event targets to ES async iterators

co with bluebird promises

Test whether all promises passes a testing function

Modern and scalable routing for React applications

Retry a promise-returning or async function

Simple asynchronous middleware pattern

Better Queue for NodeJS

Async middleware for JavaScript and TypeScript

Cooperative multi-tasking for Javascript

zip and unzip library for node

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

another simple/tiny javascript/css loader

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()

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

Convert Node.js streams to streaming iterables

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.

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

Modern and scalable routing for React applications

The iterable toolbox

Higher order functions for iterators and async iterators

Universal WHATWG Fetch API for Node, Browsers and React Native

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)

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

Modern and scalable routing for React applications

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.

Load a remote script asynchronously

multiple hash functions

Detects missing await on async function calls

Tiny event bus inspired in Node's EventEmitter