type-fest

A collection of essential TypeScript types

$npm install type-fest

Official docs outline

Extra Credit builds an outline of type-fest's docs the first time your work uses it. Until then, start at the official documentation.

tslib Runtime library for TypeScript helper functions
emoji-regex A regular expression to match all Emoji-only symbols as per the Unicode Standard.
balanced-match Match balanced character pairs, like "{" and "}"
eslint-visitor-keys Constants and utilities about visitor keys to traverse AST.
glob the most correct and second fastest glob implementation in JavaScript
ajv Another JSON Schema Validator
yallist Yet Another Linked List
source-map Generates and consumes source maps
escape-string-regexp Escape RegExp special characters
readable-stream Node.js Streams, a user-land copy of the stream library from Node.js
react-is Brand checking of React Elements.
undici-types A stand-alone types package for Undici