JSPM

The jsbn library is a fast, portable implementation of large-number math in pure JavaScript, enabling public-key crypto and other applications on desktop and mobile browsers.

utility box for ECMAScript language tools

Detect whether or not an object is a Typed Array

Base64 encoding/decoding in pure JS

Make your own error types!

Read/write IEEE754 floating point numbers from/to a Buffer or array-like object

Wrap those words. Show them at what columns to start and stop.

Implementation of JSON Web Signatures

Determine if an object is a Buffer

Require module from string

The string_decoder module from Node core

Safer Node.js Buffer API

get colors in your node.js console

Node.js Buffer API, for the browser

Full featured Promises/A+ implementation with exceptionally good performance

Unpipe a stream from all destinations

JSDoc parser

Fast deep equal

Resolve the path of a module like `require.resolve()` but from a given path

Hand-written ICU MessageFormat parser with compatible output as [`intl-messageformat-parser`](https://www.npmjs.com/package/intl-messageformat-parser) but 6 - 10 times as fast.

Basic cache object for storing key-value pairs.

ES2015 `Object.assign()` ponyfill

two functions: One that returns true, one that returns false

Get the native type of a value.

Efficient implementation of Levenshtein algorithm with locale-specific collator support.

OAuth 1 signing. Formerly a vendor lib in mikeal/request, now a standalone module.

the stream module from node core for browsers

Convert encodings, uses iconv-lite

HTTP response freshness testing

Escape string for use in HTML

Environment agnostic nextTick polyfill

Iterator abstraction based on ES6 specification

Check whether a string is a URL.

A cache for managing namespaced sub-caches

Create simple HTTP ETags

writable stream that concatenates strings or binary data and calls a callback with the result

Utilities to help expose prettier output in linting tools

Modern Buffer API polyfill without footguns

Full zlib module for the browser

HTTP methods that node supports

timers module for browserify

Recursively iterates over specified directory, require()'ing each file, and returning a nested hash structure containing those modules.

Treat a collection of Buffers as a single contiguous partially mutable Buffer.

Mirror of mkdirp 0.5.2

Define a non-enumerable property on an object. Uses Reflect.defineProperty when available, otherwise Object.defineProperty.

Minimal async jobs utility library, with streams support

getpass for node.js

Generates a base64 id

Simple RFC 6838 media type parser and formatter

Generic extension manager for WebSocket connections

Returns true if the value is an object and not an array or null.

Operating system specific paths.

Fast and simple xml generator. Supports attributes, CDATA, etc. Includes tests and examples.

Growl unobtrusive notifications

Manipulate the HTTP Vary header

js function for hashing messages with MD5

parse a url with memoization

Node.JS path module

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

QRCodes, in the terminal

Returns true if a value is a plain object, array or function.

process information for node.js and browsers

Check if a value is a natural number

Babel plugin to transpile import() to a deferred require(), for node

Creates a shallow clone of any JavaScript value.

Converter from any base to other any base

Repeat the given string n times. Fastest implementation for repeating a string.

Wrap Streams2 instance into a HandleWrap

return the first event in a set of ee/event pairs

is that thing a function? Use this module to find out

quote and unquote strings. escapes internal quotes and slashes. Automatically decides whether to use single or double quotes.

This is lightweight memory stream module for node.js.

An XML builder for node.js

JavaScript implementation of the BSER Binary Serialization

Convert a typed array to a Buffer without a copy

returns nonce

Postgres bytea parser

node.js basic auth parser

Pluralize and singularize any word

Edit a string with the users preferred text editor using $VISUAL or $ENVIRONMENT

Querystringify - Small, simple but powerful query string parser.

Port of the OpenBSD bcrypt_pbkdf function to pure JS

[](https://travis-ci.org/hunterloftis/stoppable)

prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.

Babel Types is a Lodash-esque utility library for AST nodes

Toggle current selected content in browser

Port of TweetNaCl cryptographic library to JavaScript

Compressible Content-Type / mime checking

compose Koa middleware

Returns true if the platform is windows. UMD module, works with node.js, commonjs, browser, AMD, electron, etc.

The map of HTTP status codes from the builtin http module

Copy static properties, prototype properties, and descriptors from one object to another.

Serve directory listings

Utils for working with JavaScript classes and prototype methods.

Range header field string parser

A JavaScript parser

Extend an object with the properties of additional objects. node.js/javascript util.

asynchronous file and directory operations for Node.js

Isomorphic WHATWG Fetch API, for Node & Browserify

a collection of useful streams

WebSocket protocol handler with pluggable I/O

A highly configurable, middleware compatible implementation of CORS.

For encoding to/from base64urls

Detect if your code is running on an AWS Lambda server

HTTP proxying for the masses

Utilities for the snapdragon parser/compiler.

Check that two PostCSS nodes share the same parent.

printf, sprintf, and vsprintf for JavaScript

API for combining call site modifiers

Parse a passwd file into a list of users.

`process.stdout` in your browser.

Generate a hex color from the given text

A mirror of Facebook's Warning

Join paths and globs.

Takes JavaScript code, along with a config and returns the original code with tokens wrapped as configured.

A flow control lib small enough to fit on in a slide presentation. Derived live at Oak.JS

Get the command from a shebang

ECMAScript6 WeakMap polyfill

a fast, efficient buffer writer

Promisify a callback-based function

For adding, subtracting, and indexing discontinuous ranges of numbers

Node.js CORS middleware

A lightweight library that provides tools for organizing asynchronous code

qjobs is a simple and stupid queue job manager for nodejs

JSON.parse with context information on error

Allow parsing of jsx

HTTP proxy tunneling agent. Formerly part of mikeal/request, now a standalone module.

Command-Option-Argument: Yet another parser for command line options.

Safely get a dot-notated property within an object.

npm package for https://github.com/google/diff-match-patch

Deprecate all the things

A simple MD4 hash function for JavaScript supports UTF-8 encoding.

JSON Schema for HTTP Archive (HAR)

Node's querystring module for all engines. (ES3 compat fork)

Coalesce for JavaScript. Returns the first value that is not undefined or null.

Retries a function that returns a promise, leveraging the power of the retry module.

Normalize slashes in a file path to be posix/unix-like forward slashes. Also condenses repeat slashes to a single slash and removes and trailing slashes, unless disabled.

Object.fromEntries() ponyfill (in 6 lines)

A polyfill for the Resize Observer API

Additional ESLint rules for ESLint directive comments.

XMLHttpRequest for Node

the tty module from node core for browsers

Environment agnostic event emitter

Minify URLs by converting them from absolute to relative.

Require constants across node and the browser

Super-minimalist version of `concat-stream`. Less than 15 lines!

Buffers events from a stream until you are ready to handle them.

Helper function to hoist variables

minimalistic-assert ===

Plugin for loglevel message prefixing

Detects if a file exists and returns the resolved filepath.

Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.

Deprecated. Utilities for ES3, most of which have been adopted or superseded in ES5.1. Adapted from Douglas Crockford's Remedial JavaScript

Helper function to define a map

Helper function to call delegate

A stream that emits multiple other streams one after another.

Resolve the path of a module like `require.resolve()` but from the current working directory

Helper function to replace supers

Manages the raw value formatting for generated AST nodes.

Recursively flatten an array or arrays.

Blazing fast unique hash generator

Merge multiple streams into one stream in sequence or parallel.

List of known file extensions and their MIME types

The lodash method `_.memoize` exported as a module.

Various hash functions that could be run by both browser and node

ECMAScript reserved words checker

Complete list of standard emojis.

Assign the enumerable es6 Symbol properties from one or more objects to the first object passed on the arguments. Can be used as a supplement to other extend, assign or merge methods as a polyfill for the Symbols part of the es6 Object.assign method.

URI validation functions

Easily add plugin support to your node.js application.

Compare strings containing a mix of letters and numbers in the way a human being would in sort order.

The lodash method `_.once` exported as a module.

Object utils.

Zero cost events

A transform to make UglifyJS work in browserify.

The lodash method `_.isString` exported as a module.

Remove wrapping quotes from a string.

Warning and invariant dev-ex messaging.

Fast (and loose) selective `process.env` replacer using js-tokens instead of an AST

Returns a filtered copy of an object with only the specified keys, similar to `_.pick` from lodash / underscore.

Helper function to optimise call expression

Generate a slug – transliteration with a lot of options

ESLint plugin about ECMAScript syntactic features.

CSS parser

Compile ES2015 destructuring to ES5

resolve which handles browser field support in package.json

AWS signing. Originally pulled from LearnBoost/knox, maintained as vendor in request, now a standalone module.

Write minimal node index.js files that require and export siblings by file basename

Apply ES2015 function.name semantics to all functions

Compile ES2015 sticky regex to an ES5 RegExp constructor

Require global variables

Custom errors

The lodash method `_.isBoolean` exported as a module.

Bit twiddling hacks for JavaScript

Strip line and/or block comments from a string. Blazing fast, and works with JavaScript, Sass, CSS, Less.js, and a number of other languages.

removes trailing slashes

Javascript Redis protocol (RESP) parser

Rational approximation with bounded denominator

The lodash method `_.isPlainObject` exported as a module.

Automatically add displayName to all your components

Map `visit` over an array of objects.

The lodash method `_.uniq` exported as a module.

Like an array, but rounder.

Temporary files and directories

Port of jQuery.extend for node.js and the browser

Helper function to build binary assignment operator visitors

Lightweight library for composing asynchronous and event-based operations in JavaScript

Format and manipulate numbers.

Time duration utilities

Library to walk OAS 3 schema objects and call a callback

Test whether an object looks like a promises-a+ promise

Local username and password authentication strategy for Passport.

Microsoft sucks

babel selfContained runtime

The lodash method `_.debounce` exported as a module.

Convert a file: URI to a file path

Caseless object set/get/has, very useful when working with HTTP headers.

Safely clone node's fs.Stats instances without losing their class methods

Helper function to check for literal RegEx

Awesome Media Queries in JavaScript

Returns true if a string has an extglob.

ECMAScript 2015 (ES6) Object.assign polyfill and ponyfill

merge() utility function

Write buffer

a pure-JavaScript Node.JS module for random-access decoding bzip2 data

Build chainable fluent interfaces the easy way... with a freakin' chainsaw!

invariant

Unsigned integers for Javascript

LRU Queue

Helper module for loading your native module's .node file

Algorithm for finding the root of a yarn workspace, extracted from yarnpkg.com

Helper function to get function arity

Recursively (deep) clone JavaScript native types, like Object, Array, RegExp, Date as well as primitives.

HTTP Agent that keeps socket connections alive between keep-alive requests. Formerly part of mikeal/request, now a standalone module.

Higher-order functions for easier error handling

Random number generator for browsers and node.js

A small api to read and write your requirejs config file

Utility package to determine if an `Array.prototype` method properly boxes the callback's receiver and third argument.

A tiny (less than 1k) event emitter library

CLS using AsynWrap instead of async-listener - Node >= 4.7.0

Native JS murmur hash implementation

An elegant way to define lightweight protocols on-top of TCP/TLS sockets in node.js

Allow parsing of object rest/spread

Check if a certain debug flag is enabled.

Convert efficiently index to/from line-column in a string

Code for processing filters in pug templates

Colors of Google's Material Design made available to coders

Javascript function that triggers browser to save javascript-generated content to a file

The Lodash method `_.merge` exported as a module.

A modern alternative to CSS resets