250 Most Popular Javascript Packages

Traverse JSON Schema passing each schema object to callback

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

Tool for transforming styles with JS plugins

Wordwrap a string with ANSI escape codes

Promisify a callback-style function

Recursively mkdir, like `mkdir -p`

A regular expression to match all Emoji-only symbols as per the Unicode Standard.

This package contains shared types of Jest's packages.

easily create complex multi-column command-line-interfaces

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

A querystring parser that supports nesting and arrays, with a depth limit

Brand checking of React Elements.

Glob matching for javascript/node.js. A replacement and faster alternative to minimatch and multimatch.

Bash-like brace expansion, implemented in JavaScript. Safer than other brace expansion libs, with complete support for the Bash 4.3 braces specification, without sacrificing speed.

Brace expansion as known from sh/bash

Fill in a range of numbers or letters, optionally passing an increment or `step` to use, or create a regex-compatible range with `options.toRegex`

Cross platform child_process#spawn and child_process#spawnSync

Process execution for humans

Like which(1) unix command. Find the first instance of an executable in the PATH.

Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js

resolve like require.resolve() on behalf of files asynchronously and synchronously

Global identifiers from different JavaScript environments

Implements the WebIDL algorithms for converting to and from JavaScript values

Constants and utilities about visitor keys to traverse AST.

Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than 2.78 million test assertions.

TypeScript definitions for yargs

YAML 1.2 parser and serializer

Returns `true` if the given string looks like a glob pattern or an extglob pattern. This makes it easy to create code that only uses external modules like node-glob when necessary, resulting in much faster code execution and initialization time, and a bet

A library to create readable "multipart/form-data" streams. Can be used to submit forms and file uploads to other web applications.

Get the PATH environment variable key cross-platform

Stringify any JavaScript value.

Convert Windows backslash paths to slash paths

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

User-friendly glob matching

utils for webpack loaders

An implementation of the WHATWG URL Standard's URL API and parsing machinery

CLI arguments parser. Native port of python's argparse.

Check if something is a Node.js stream

Make a callback- or promise-based function support both promises and callbacks.

Make a directory and its parents if needed - Think `mkdir -p`

Generate errors that contain a code frame that point to source locations.

the bare-bones internationalization library used by yargs

Convert character encodings in pure javascript.

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

Find the root directory of a Node.js project or npm package

Parse JSON with more helpful errors

Regular expression for matching a shebang line

Get the command from a shebang

A comprehensive library for mime-type mapping

parse argument options