An AST-based pattern checker for JavaScript.
Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
A simple cache for a few of the JS Error constructors.
ES Math-related intrinsics and helpers, robustly cached.
Reactive Extensions for modern JavaScript
Execute a callback when a request closes, finishes, or errors
Performant, flexible and extensible forms library for React Hooks
Give a regex, get a robust predicate function that tests it against a string.
Set a function's length property
Strip ANSI escape codes from a string
JavaScript parser and stringifier for YAML
Utility functions for working with TypeScript's API. Successor to the wonderful tsutils. 🛠️️
TypeScript scope analyser for ESLint
A robust, ES3 compatible, "has own property" predicate.
Simple and complete React DOM testing utilities that encourage good testing practices.
Runtime-agnostic core of ESLint
Share target browsers between different front-end tools, like Autoprefixer, Stylelint and babel-env-preset
Is this value a JS SharedArrayBuffer?
Convert character encodings in pure javascript.
The ultimate javascript content-type utility.
Is this specifier a node.js core module?
fs-extra contains methods that aren't included in the vanilla Node.js fs package. Such as recursive mkdir, copy, and remove.
Super-fast alternative to Babel for when you can target modern JS runtimes
the mighty option parser used by yargs