All essential TypeScript types in one place 🤙

A library of composable functions for the type-level! Transform your TypeScript types in any way you want using functions you already know.

🌸 Learn Japanese grammar with TypeScript

Additional types and types adjusted utilities for TypeScript

Interactive exercises to get familiar with TypeScript's most advanced features

A type-level library enabling the creation and the manipulation of type constructors which can be detached from their type parameters. Also referred to as higher kinded types.

Tartak is a functional programming language that compiles to TypeScript types.

A proof of concept of a tree shakable Zod alternative. This library aims to have a 1:1 Zod compatible API, but with fine grain control over the final bundle size. This was done by a combination of Proxies and type-level programming.

🍃 A micro HKT (higher-kinded type) implementation for TypeScript, with type safety elegantly guaranteed.

A tool for evaluating TypeScript types step by step.

Code samples for my talk “Type-level programming in TypeScript”

Extract or modify pieces of arbitrarily nested types with type lenses

A type programming language which compiles to and interops with type-level TypeScript

Bring type level information to value level.

A small library for testing your types

A handy collection of TypeScript plain and generic type definitions and interfaces.

Type-level Peano arithmetic, lists and more using TypeScript 4.1's recursive conditional types

Playground for exploring type-level programming.

A brainfuck interpreter running within the typescript type system

A collection of useful operators to make type-level programming in TypeScript easier