# developit/preact

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38,704 stars · 2,035 forks · JavaScript · MIT

## Links

- GitHub: https://github.com/developit/preact
- Homepage: https://preactjs.com
- awesome-repositories: https://awesome-repositories.com/repository/developit-preact.md

## Description

Preact is a declarative UI library and a lightweight alternative to React for building user interfaces. It utilizes a component-based architecture and a virtual DOM to sync application state to the browser interface efficiently.

The framework implements a modern React API and provides a compatibility layer to ensure existing component libraries and patterns can run within its environment. It also functions as a server-side rendering engine, generating HTML on the server and hydrating it on the client to optimize page load speeds.

Additional capabilities include virtual DOM state management to reduce expensive rendering operations and a pluggable rendering scheduler to manage the timing of user interface updates.

## Tags

### User Interface & Experience

- [User Interface Frameworks](https://awesome-repositories.com/f/user-interface-experience/user-interface-frameworks.md) — Provides a comprehensive framework for building interactive web interfaces through the assembly of component trees. ([source](https://github.com/developit/preact#readme))
- [Declarative UI Libraries](https://awesome-repositories.com/f/user-interface-experience/declarative-ui-libraries.md) — Implements a declarative syntax for defining and composing user interface structures via a component tree.
- [User Interface Components](https://awesome-repositories.com/f/user-interface-experience/user-interface-components.md) — Facilitates the creation of complex interfaces using reusable UI components and layout patterns.
- [Virtual DOM Engines](https://awesome-repositories.com/f/user-interface-experience/virtual-dom-engines.md) — Employs a virtual DOM engine to manage UI updates through the reconciliation of virtual element trees.
- [Update Schedulers](https://awesome-repositories.com/f/user-interface-experience/main-thread-dispatchers/update-schedulers.md) — Includes update schedulers that prioritize urgent interactions by deferring non-critical user interface updates. ([source](https://github.com/developit/preact#readme))

### Web Development

- [API Compatibility Layers](https://awesome-repositories.com/f/web-development/backend-development/web-frameworks/full-stack-frameworks/react-frameworks/api-compatibility-layers.md) — Implements the modern React API to ensure compatibility with existing component libraries and development patterns.
- [Component Composition](https://awesome-repositories.com/f/web-development/component-composition.md) — Utilizes component composition to represent the user interface as a recursive hierarchy of lightweight objects.
- [Virtual DOM Implementations](https://awesome-repositories.com/f/web-development/frontend-development-tools/frontend-frameworks/rendering-engines/virtual-dom-implementations.md) — Provides a lightweight virtual DOM implementation to optimize UI rendering through efficient tree reconciliation.
- [Lightweight UI Frameworks](https://awesome-repositories.com/f/web-development/lightweight-ui-frameworks.md) — Acts as a minimalist, low-overhead alternative to React for building high-performance interactive user interfaces.
- [Hydration Mechanisms](https://awesome-repositories.com/f/web-development/rendering-templating/server-side-rendering/hydration-mechanisms.md) — Provides hydration mechanisms to attach client-side interactivity to server-rendered HTML.
- [Server-Side Rendering](https://awesome-repositories.com/f/web-development/server-side-rendering.md) — Supports server-side rendering to generate static markup, improving initial page load speeds and SEO. ([source](https://github.com/developit/preact#readme))
- [Server-Side Rendering Engines](https://awesome-repositories.com/f/web-development/server-side-rendering-engines.md) — Functions as a system that generates dynamic HTML on the server before hydrating it on the client.
- [Virtual DOM Diffing](https://awesome-repositories.com/f/web-development/virtual-dom-diffing/dom-state-preservation/virtual-dom-diffing.md) — Syncs application state to the browser interface by calculating minimal differences between virtual data structures. ([source](https://github.com/developit/preact#readme))
- [Virtual DOM Reconciliation](https://awesome-repositories.com/f/web-development/virtual-dom-reconciliation.md) — Implements virtual DOM reconciliation to minimize expensive browser DOM manipulations by calculating minimal differences.
- [Compatibility Layers](https://awesome-repositories.com/f/web-development/compatibility-layers.md) — Implements a compatibility layer that maps external library imports to internal framework equivalents for ecosystem interoperability.
- [Ecosystem Integrations](https://awesome-repositories.com/f/web-development/ecosystem-integrations.md) — Provides ecosystem integrations allowing existing React-based libraries and patterns to run within its environment. ([source](https://github.com/developit/preact#readme))
- [React Libraries](https://awesome-repositories.com/f/web-development/frontend-development-tools/frontend-frameworks/component-authoring/react-ecosystem/react-libraries.md) — Ensures compatibility with general-purpose utility libraries and toolkits from the React ecosystem.

### Development Tools & Productivity

- [Rendering Schedulers](https://awesome-repositories.com/f/development-tools-productivity/task-schedulers/rendering-schedulers.md) — Ships a pluggable rendering scheduler to prioritize UI updates and prevent long tasks from blocking the main thread.

### Part of an Awesome List

- [Frontend Frameworks](https://awesome-repositories.com/f/awesome-lists/devtools/frontend-frameworks.md) — A lightweight alternative to React with a similar API.
- [Related Libraries](https://awesome-repositories.com/f/awesome-lists/devtools/related-libraries.md) — Fast 3kb React alternative.
- [Web Frameworks](https://awesome-repositories.com/f/awesome-lists/devtools/web-frameworks.md) — Fast 3kb React alternative with the same ES6 API. Components & Virtual DOM.