Check if the process is running inside Windows Subsystem for Linux (Bash on Windows)

lezer-based JSON grammar

Expand placeholders in a template string

A JavaScript library that breaks strings into their individual user-perceived characters. It supports emojis!

Make a function mimic another one

Recursive object extending

Is this value a JS Boolean? This module works cross-realm/iframe, and despite ES6 @toStringTag.

Light-weight option parsing with an argv hash. No optstrings attached.

Validate identifier/keywords name

Backwards compatible shim for React's useSyncExternalStore. Works with any React that supports hooks.

Check if stdout or stderr is interactive

deterministic JSON.stringify() with custom sorting to get deterministic hashes from stringified results, with no public domain dependencies

A simple directory tree walker.

ECMAScript scope analyzer for ESLint

Compile ES2015 default and rest parameters to ES5

Syntax highlight JavaScript strings for output in terminals.

Encode & decode XML and HTML entities with ease & speed

Compile ES2015 Unicode regex to ES5

yargs the modern, pirate-themed, successor to optimist.

Check if a path is a file, directory, or symlink

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

This transformer wraps all typeof expressions with a method that replicates native behaviour. (ie. returning â symbolâ for symbols)

The set of canonical Unicode property names supported in ECMAScript RegExp property escapes.

Blazing fast and accurate glob matcher written in JavaScript, with no dependencies and full support for standard and extended Bash glob features, including braces, extglobs, POSIX brackets, and regular expressions.