Typical is TypeScript with type-safety at runtime
Spent a week in the break building a pre-compiler that brings type safety to runtime. Still pretty early, but generally does what it says. Looking for feedback, code that breaks it (check out the playground), ideas etc.
Typical is TypeScript with type-safety at runtime launched on January 11, 2026 with 8 votes, #1,339 of 14,585 launches that month and more than 75% of that year's launches.
What it does
Typical is a transformer that adds runtime validation to TypeScript automatically, giving you type safety that actually runs.
Does a similar job
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Conway's Game of Life in TypeScript's type system2023 · github.com · ▲186TypeScript playground: https://www.typescriptlang.org/play?#code/KYDwDg9gTgLgBDAnmY...
Lightweight runtime types for vanilla JavaScript2020 · github.com · ▲19:icecream: vanillatype - Lightweight runtime types for vanilla JS and Node - crisdosaygo/vanillatype
Zero-codegen, no-compile TypeScript type inference from Protobufs2025 · github.com · ▲138🛫 Zero-codegen, no-compile TypeScript `type` inference from protobuf `message`s - nathanhleung/protobuf-ts-types
Uniform GraphQL2021 · uniform-graphql.whatsgood.dog · ▲65GraphQL APIs in TypeScript with complete e2e type safety
TypeScript 6.0Mar 2026 · typescriptlang.org · ▲156The Playground lets you write TypeScript or JavaScript online in a safe and sharable way.
ESInfer – Make JavaScript Type-Safe2022 · esinfer.com · ▲83Hello, folks. I'm Jiang, the author of ESInfer. I love writing Javascript because it has a prosperous ecosystem and is quick to get my hands dirty. However, sometimes it's painful when the flow is not fast to follow due to the lack of a type system. To solve this, I wrote ESInfer, a statical inference tool, to automatically type check and generate type annotations for Javascript. It works with pure Javascript without any add-ons to the language or user-space code and supports highly dynamic features, such as the modification of prototypes. It is still in the very early stage, which offers…
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Source: Show HN post ↗
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