250 Most Popular Javascript Packages

RFC4122 (v1, v4, and v5) UUIDs

ECMAScript JS AST traversal functions

Extract the non-magic parent path from a glob string.

Recursively mkdir, like `mkdir -p`

JSON for humans.

a glob matcher in javascript

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

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

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

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

Cross platform child_process#spawn and child_process#spawnSync

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

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`

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.

Traverse JSON Schema passing each schema object to callback

easily create complex multi-column command-line-interfaces

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

Process execution for humans

Implements the WebIDL algorithms for converting to and from JavaScript values

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

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

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

Global identifiers from different JavaScript environments

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

User-friendly glob matching

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

Transforms css values and at-rule params into the tree

Constants and utilities about visitor keys to traverse AST.

Parse JSON with more helpful errors

utils for webpack loaders

A comprehensive library for mime-type mapping

Create HTTP error objects

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

Check if something is a Node.js stream

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

Get the PATH environment variable key cross-platform

Higher-order functions and common patterns for asynchronous code

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

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

parse argument options

`Start a promise chain

Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.

Returns true if a value has the characteristics of a valid JavaScript data descriptor.

YAML 1.2 parser and serializer

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

the bare-bones internationalization library used by yargs

Ignore is a manager and filter for .gitignore rules, the one used by eslint, gitbook and many others.

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.

This package contains shared types of Jest's packages.

Brand checking of React Elements.