The front end framework for correctness: built on Effect, architected like Elm
Built on Effect. Architected like Elm. Written in TypeScript.
React, Vue, Svelte, and Solid solve rendering and leave the architecture to you. Foldkit gives you the architecture, so you can focus on your domain.
One immutable model holds your entire application state. Every change flows through a single update function. No hidden mutations, no stale closures, no surprises.
Side effects are values you return from update, not imperative calls buried in handlers. Commands describe what should happen. The runtime handles when and how.
Complexity grows linearly, not exponentially. A 50-file app follows the same patterns as a 5-file app, so each feature adds structure instead of entangling with what is already there. New team members read the code and understand it.
If you already know Effect, Foldkit feels natural. If you’re new to Effect, Foldkit is a great way to learn it.