simpreact

simpreact is a lightweight React-like virtual DOM library written in TypeScript. It implements an iterative (non-recursive) mount/patch/unmount engine, hooks (useState, useEffect, useRef, ...), context, portals, memo, refs, and a JSX runtime compatible with React's automatic JSX transform.

A @simpreact/compat layer makes it usable as a drop-in for React 18 code — createElement, hooks, createContext, render/createRoot, class components, Suspense, forwardRef. @simpreact/ssr renders to an HTML string on the server, and createHydrateRoot (from @simpreact/dom) adopts that markup on the client instead of re-creating it. @simpreact/signals adds fine-grained reactivity on top of the same render runtime. Published as an ESM-only package with subpath exports per module.

Documentation

Core

• Element Structure
• Mounting
• Patching
• Unmounting
• Rerender
• Process Stack
• Lifecycle Event Bus

Compat

• Compat Layer

Signals

• Signals