A fast 4kB alternative to React with the same modern API, featuring components and a virtual DOM.
Preact is a fast, lightweight alternative to React that provides the same modern API for building user interfaces with components and a virtual DOM. It solves the problem of large bundle sizes by offering a 4kB library that maintains full compatibility with React's patterns and ecosystem. Developers can use familiar tools like JSX, hooks, and SSR while achieving better performance.
Frontend developers building web applications who need a React-like experience with minimal bundle size, especially those working on performance-critical projects like progressive web apps or embedded systems.
Developers choose Preact over React for its significantly smaller footprint and faster performance without sacrificing compatibility. Its unique selling point is providing nearly all of React's features in a 4kB package, making it ideal for projects where load time and efficiency are paramount.
⚛️ Fast 3kB React alternative with the same modern API. Components & Virtual DOM.
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At 4kB gzipped, Preact is significantly smaller than React, reducing load times for performance-critical applications as highlighted by the size badges in the README.
Supports ES6 classes, hooks, and functional components with the same patterns as React, allowing developers to use familiar tools without a steep learning curve.
The preact/compat alias enables use of many React libraries, facilitating migration and reducing rewrites for existing React projects.
Includes a highly optimized diff algorithm and seamless hydration from SSR, ensuring fast updates and efficient rendering as described in the README.
Using preact/compat adds to the bundle size and may introduce subtle behavioral differences, potentially offsetting some of the size benefits in complex applications.
While compatible with React libraries, the Preact-specific ecosystem is smaller, meaning fewer community-driven components and tools tailored specifically for Preact.
Preact may not immediately support all new React features, causing delays for teams wanting to use cutting-edge APIs or patterns as soon as they are released.
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