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Preact - Fast 3kB React alternative with the same modern API

A lightweight JavaScript library offering a modern React-like API for building user interfaces, focusing on performance and small bundle size, ideal for projects where speed is critical.

JavaScript
Added on 2025年6月2日
View on GitHub
Preact - Fast 3kB React alternative with the same modern API preview
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Project Introduction

Summary

Preact is a significantly smaller and faster component-based UI library, built with the same modern API features as React, including components, Virtual DOM, JSX, and Hooks.

Problem Solved

Provides a solution for developers who need the productivity benefits of a declarative, component-based UI library but require a minimal bundle size and faster runtime performance compared to larger alternatives.

Core Features

Tiny Size (3kB)

Minimizes JavaScript payload, leading to faster load times, especially on mobile networks.

React Compatibility

Offers a highly compatible API, allowing developers familiar with React to easily transition or even use many existing React libraries.

Efficient Virtual DOM

Leverages a fast and memory-efficient Virtual DOM implementation for quick UI updates.

Components and JSX

Supports building UIs with reusable components and familiar JSX syntax.

Tech Stack

JavaScript
HTML
CSS
JSX

使用场景

Preact shines in scenarios where performance, size, and speed are paramount, while still providing a productive development experience:

Scenario 1: Building Performance-Sensitive Web Applications

Details

Ideal for creating single-page applications (SPAs) or complex websites where initial load time and runtime performance are critical factors, especially targeting mobile users.

User Value

Delivers a faster user experience and potentially improves SEO metrics related to page speed.

Scenario 2: Integrating UI into Existing Projects

Details

Excellent for adding interactive UI components (like widgets, forms, or small modules) to legacy or non-React websites without adding significant overhead.

User Value

Allows leveraging modern component-based development for specific parts of a site without a full framework rewrite.

Scenario 3: Creating Fast Static Site Generator Frontends

Details

Perfect for pairing with static site generators where the final JavaScript bundle size directly impacts hydration time and performance after the initial HTML load.

User Value

Contributes to quicker interactive states for static content.

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