250 Most Popular npm Packages

Tiny queue data structure

ANSI escape codes for manipulating the terminal

Fixes stack traces for files with source maps

User-friendly glob matching

string representations of objects in node and the browser

Share target browsers between different front-end tools, like Autoprefixer, Stylelint and babel-env-preset

A light-weight module that brings Fetch API to node.js

Generate an AST from a string template.

The Babel Traverse module maintains the overall tree state, and is responsible for replacing, removing, and adding nodes

Human-friendly process signals

Determine if the JS environment has Symbol support. Supports spec, or shams.

babel's modular runtime helpers

Determines if an object can be used as an array

Lodash modular utilities.

TypeScript scope analyser for ESLint

Is this specifier a node.js core module?

Higher-order functions and common patterns for asynchronous code

Babel compiler core.

concatenative mapdashery

Run a function exactly one time

Easily read/write JSON files.

Deprecate all the things

Returns true if a string has an extglob.

Promise based HTTP client for the browser and node.js

> Selector parser with built in methods for working with selector strings.

Get callsites from the V8 stack trace API

Tiny JavaScript tokenizer.

Get details about the current Continuous Integration environment

Callback wrapping utility

An extremely fast JavaScript and CSS bundler and minifier.

Module for executing heavy tasks under forked processes in parallel, by providing a `Promise` based interface, minimum overhead, and bound workers.

Write files in an atomic fashion w/configurable ownership

Fast, in memory work queue

option parsing and help generation

An Esprima-compatible JavaScript parser built on Acorn

Create HTTP error objects

ECMAScript parsing infrastructure for multipurpose analysis

TypeScript definitions for estree

Node.js releases data

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.

type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.

Light ECMAScript (JavaScript) Value Notation - human written, concise, typed, flexible

Slice a string with ANSI escape codes

`Object.defineProperty`, but not IE 8's broken one.

Strip the final newline character from a string or Uint8Array

Store information about any JS value in a side channel. Uses WeakMap if available.

Node.js path.parse() ponyfill

A UTF-8 string <-> UInt8Array converter

deterministic `JSON.stringify()` - a faster version of substack's json-stable-strigify without jsonify

Encode/decode sourcemap mappings