JSPM

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

Load a script asynchronously

load a script, but only once

Brings back <script> to your favorite Single Page App!

Simple function for loading script tags in the browser asynchronously

VueScriptX brings back the <script> tag to your Vue projects!

Asyncly load a script

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

functional pipelines for Java Script

React Script Tag 18, updated a five year old package that had a very well written script loader tag utility for react, updating to now use TypeScript and React 18

A higher-order React component that assists in the asynchronous loading of third party JS libraries (eg. Stripe.js)

Loads scripts cleanly and asynchronously in SPAs

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

Javascript build tools based on coffee-script & cake

Loading wrapper and TypeScript types for the PayPal JS SDK

Pace.js load progress bar for Ember apps, incl. Flash-like initial script lazy loading

Tiny async loader for modern browsers

Plugin to add various attributes to script tags injected by html-webpack-plugin

Utility to "pipe" async iterables together

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

Run multiple promise-returning & async functions with limited concurrency

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

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

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

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

Fast, in memory work queue

Minimal async jobs utility library, with streams support

Async loader for google maps api (browser, typescript)

`Start a promise chain

Runtime for Regenerator-compiled generator and async functions.

Run an array of functions in parallel

Map over promises concurrently

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

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

Determine if a function is a native async function.

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

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

A function that returns the normally hidden `AsyncFunction` constructor

generator async control flow goodness

A basic but performant promise implementation

Universal WHATWG Fetch API for Node, Browsers and React Native

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

Async/await error handling support for expressjs

Explode async and generator functions into a state machine.

Create a promise that can be canceled

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

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

FantasyLand compliant (monadic) alternative to Promises

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

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

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

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

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

Create a deferred promise

asynchronous function queue with adjustable concurrency

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

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

Asynchronous flow control with a functional taste to it

A promise based streaming tokenizer

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

Delay a promise a specified amount of time

Promise queue with concurrency control

Environment agnostic nextTick polyfill

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

Check if something is a promise

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

asynchronous function queue with adjustable concurrency

Promisify an event by waiting for it to be emitted

Create handshakes for binary protocols with iterable streams

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

Filter promises concurrently

Iterate over promises serially

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

Run some code when the process exits

Isomorphic, functional type-checking for Javascript

Memoize/cache function results

Distributed task scheduler and rate limiter

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

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.

A mutex for guarding async workflows

Lock on asynchronous code

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.

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

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

Create sync/async APIs with usable logic

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

Semaphore using `async` and `await`

Asynchronous bootstrapping of Node applications

Wait for a condition to be true

Settle an async function.

A JavaScript extension package for building strong and modern applications.

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

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

Throttle promise-returning & async functions

Extends Chai with assertions about promises.

Map over promises serially

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.

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

Compose your async functions with elegance.

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.

Compose promise-returning & async functions into a reusable pipeline

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

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

Run an array of functions in series

`timers/promises` for client and server.

Take care of your `spawn()`

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

validate form asynchronous

Modular and fast Promises implementation

Memoize promise-returning & async functions

Wait for multiple callback

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.

Create the powerful singleton easily

A simple asynchronous tool

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

An optionally-asynchronous forEach with an interesting interface.

Modern and scalable routing for React applications

Promisified setTimeout

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

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

In memory queue system prioritizing tasks

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

Modern and scalable routing for React applications

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

Settle promises concurrently and get their fulfillment value or rejection reason

The JavaScript Task Runner

Wait for any promise to be fulfilled

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.

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

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

Modern and scalable routing for React applications

Run a script that exports an `async` function

Apply an async function to each Array element in series.

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

Abortable async function helpers

Modern and scalable routing for React applications

Coalesces multiple promises for the same identifier into a single request

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

Map-like, concurrent promise processing for Node.js

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

Parser for FTP server responses

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

Modern and scalable routing for Web applications

Abstract streams to deal with the whole buffered contents.

A sane FTP client implementation for NodeJS

Modern and scalable routing for React applications

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

Resolve a path by walking parent directories.

YouTube IFrame Player API abstraction.

Test whether a path exists on the filesystem.

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

Make array iteration easy when using async/await and Promises

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

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

Zero-overhead asynchronous parallel/each/map function call

Async value container

Read the entire contents of a file.

Creates a value/error pair to mimic promise behavior

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

call your callbacks in a waterfall, at speed

Lightweight promise/generator machinery.

Evaluate asynchronous tasks with configurable concurrency.

An event emitter implementation with async support in mind

Transform async/await to promise chains

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

Flush promises in tests

Modern and scalable routing for React applications

Zero-overhead asynchronous series/each/map function calls

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

Debounce promise-returning & async functions

Add a callback to the next tick queue.

A simple and non-blocking PNG encoder / decoder.

horsepower for your modules

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

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

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

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

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

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

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

Automated browser testing for the modern web development stack.

Library that can be used to retry functions that return promise

ES7 async-await wrapper for the csv package.

Programmatically Loads remote scripts via script tag

async parallellimitmethod as module.

Caching DNS resolve

Simple, consistent sync or async process spawning

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

Dynamic scripts loading for modern browsers.

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

Express Error Handler for Async Functions

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

Mutex locks for async functions

Parse ePub electronic book files with Node.JS

Generic browser priority queue.

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

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

Asynchronous Array Utilities (for await)

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

Simply gzip and ungzip in Node.js with promises

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

ES6 Promise polyfill

A lightweight promise library

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

Asynchronous iterator function for parallel processing.

seriously like the best async child process library

Async hook

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

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.

Retry a promise-returning or async function

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

co with bluebird promises

Wrapper above react-select that supports pagination on menu scroll

Modern and scalable routing for React applications

Better Queue for NodeJS

Convert event emitters and event targets to ES async iterators

Test whether all promises passes a testing function

Cooperative multi-tasking for Javascript

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

Simple asynchronous middleware pattern

Async middleware for JavaScript and TypeScript

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

zip and unzip library for node

The iterable toolbox

Asynchronous String.prototype.replace()

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

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

Modern and scalable routing for React applications

another simple/tiny javascript/css loader

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.