Top 8 TypeScript Type System Projects

type-challenges

78 39,998 8.1 TypeScript

Collection of TypeScript type challenges with online judge

Project mention: 5 Resources Each TypeScript Developer Should Know About | dev.to | 2024-03-10

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HypeScript

15 1,894 0.0 TypeScript

🐬 A simplified implementation of TypeScript's type system written in TypeScript's type system
SurveyJS

surveyjs.io sponsored

Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
zui

2 1,731 9.6 TypeScript

Zui is a powerful desktop application for exploring and working with data. The official front-end to the Zed lake.
meta-typing

7 1,523 0.0 TypeScript

📚 Functions and algorithms implemented purely with TypeScript's type system

Project mention: Functions and algorithms implemented purely with TypeScript's type system | /r/patient_hackernews | 2023-07-05

typetype

5 405 0.0 TypeScript

A programming language designed for typescript type generation
type-plus

1 350 9.6 TypeScript

Additional types and types adjusted utilities for TypeScript

Project mention: Trying to Understand Copilot's Type Spaghetti | news.ycombinator.com | 2024-04-15

That’s just how type programming looks.
Here’s (https://github.com/unional/type-plus/blob/main/packages/type...) a human written example that’s well-factored and uses loads of subtypes to clarify what it’s doing - but it’s still going to read like the black tongue of Mordor to you if you’re not familiar with how this kind of type stuff is structured and used.
And factoring all that stuff out may help readability but it doesn’t help comprehension - try and trace what the actual underlying type definitions for some of those utility types like IdentityEqual<> are actually doing (look at https://github.com/unional/type-plus/blob/main/packages/type...) and realize the rabbit hole runs deep in this stuff.

TypeGame

3 272 0.0 TypeScript

👾 Sokoban Game in Pure TypeScript Type System
WorkOS

workos.com sponsored

The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
cicada

9 92 7.4 TypeScript

Cicada Language (by cicada-lang)

Project mention: Cicada – A FOSS, Cross-Platform Version of GitHub Actions and Gitlab CI | news.ycombinator.com | 2023-11-06

There is a collision in names:
Cicada, this CI tool, uses a DSL (domain specific language) to write configuration, and this DSL is referred to as "Cicada language", and blasted in marketing copy as a "real programming language" on https://cicada.sh/
However, this is a completely different language from Cicada language, a programming language and theorem prover hosted at https://cicada-lang.org/ and https://github.com/cicada-lang/cicada
This name collision is very confusing, and I wonder why Cicada the CI tool didn't just stick to python, since it is also a "real programming language"

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).