250 Most Popular npm Packages

Ensure a function is only called once

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

A JavaScript parser

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`

Node.js Buffer API, for the browser

Regular expression for matching a shebang line

Get the command from a shebang

Minimal and efficient cross-platform file watching library

Validate identifier/keywords name

Strip comments from JSON. Lets you use comments in your JSON files!

Get and robustly cache all JS language-level intrinsics at first require time

the bare-bones internationalization library used by yargs

Strip UTF-8 byte order mark (BOM) from a string

HTTP status utility

Types for the TypeScript-ESTree AST spec

JavaScript parser and stringifier for YAML

Promisify a callback-style function

HTTP server cookie parsing and serialization

Express style path to RegExp utility

Implementation of Function.prototype.bind

Match balanced character pairs, like "{" and "}"

Recursive version of fs.readdir with small RAM & CPU footprint.

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

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

A comprehensive library for mime-type mapping

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

Get your PATH prepended with locally installed binaries

A parser that converts TypeScript source code into an ESTree compatible form

Turns an AST into code.

Determines if an object can be used as an array

Encode/decode sourcemap mappings

Visitor keys used to help traverse the TypeScript-ESTree AST

Tiny JavaScript tokenizer.

It's a very fast and efficient glob library for Node.js

Make a function mimic another one

Parse JSON with more helpful errors

A drop-in replacement for fs, making various improvements.

A smaller version of caniuse-db, with only the essentials!

Get details about the current Continuous Integration environment

Generate source maps

parse argument options

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

JavaScript sprintf implementation

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

Provides a list of electron-to-chromium version mappings

Find and load configuration from a package.json property, rc file, TypeScript module, and more!

Lodash modular utilities.

Is this specifier a node.js core module?

Encode a URL to a percent-encoded form, excluding already-encoded sequences