Show HN: Foldkit vs. React, the same pixel art editor implemented in both

- Foldkit is a new TypeScript framework built on Effect (a TypeScript library for handling side effects, errors, and concurrency in a functional way) and inspired by the Elm Architecture (a pattern where state updates flow through a single centralized "update" function). - The Elm Architecture, originally from the Elm language, structures apps as a tight loop: Model (state) → View (UI) → Update (a pure function that returns new state and side effects). No mutable state or scattered event handlers. - Effect is gaining popularity in the TypeScript ecosystem as a way to write reliable, testable code with built-in error handling, retries, and dependency injection — concepts borrowed from functional programming. - This page compares two versions of the same pixel art editor — one in React (the dominant UI library) and one in Foldkit — to show what development feels like, not just benchmark numbers. The point is to illustrate architectural differences in state management, async operations, side effects, and testing.