About react
React is a versatile and powerful JavaScript library designed to simplify the process of building dynamic user interfaces. Created by Facebook, React has become a fundamental tool for developers due to its declarative nature, component-based architecture, and the philosophy of 'learn once, write anywhere.' By providing a streamlined approach to managing the state and rendering of UI components, React enables developers to create interactive and efficient user experiences with ease.
At its core, React's declarative approach ensures that the UI remains consistent with the application's state. Developers can design straightforward views for each state in their application, and React will automatically handle the rendering and updating of components as the data changes. This predictability and simplicity make the codebase easier to understand and debug, promoting a smoother development workflow.
React's component-based architecture is another key feature that sets it apart. Developers can build encapsulated components that manage their own state and then combine them to form more complex UIs. This modular approach not only enhances code reusability but also simplifies the management of large-scale applications. By keeping the state logic within JavaScript and out of the DOM, React facilitates seamless data flow and interaction within the application.
One of the standout advantages of React is its flexibility and adaptability. The library does not impose strict requirements on the technology stack, allowing developers to integrate React into existing projects without the need for extensive rewrites. Additionally, React's ability to render on the server using Node.js and power mobile applications with React Native broadens its applicability across different platforms and environments.
The React community actively contributes to its development, ensuring that the library remains up-to-date and continuously improving. With extensive documentation, tutorials, and a vibrant community, getting started with React is accessible to developers of all levels. Whether you are adding React to an existing project or creating a new application from scratch, React provides the tools and resources necessary to build efficient, scalable, and high-performing user interfaces.
Dependencies
Core dependencies of this npm package and its dev dependencies.
@babel/cli, @babel/code-frame, @babel/core, @babel/helper-module-imports, @babel/parser, @babel/plugin-external-helpers, @babel/plugin-proposal-class-properties, @babel/plugin-proposal-object-rest-spread, @babel/plugin-syntax-dynamic-import, @babel/plugin-syntax-import-meta, @babel/plugin-syntax-jsx, @babel/plugin-syntax-typescript, @babel/plugin-transform-arrow-functions, @babel/plugin-transform-block-scoped-functions, @babel/plugin-transform-block-scoping, @babel/plugin-transform-classes, @babel/plugin-transform-computed-properties, @babel/plugin-transform-destructuring, @babel/plugin-transform-for-of, @babel/plugin-transform-literals, @babel/plugin-transform-modules-commonjs, @babel/plugin-transform-object-super, @babel/plugin-transform-parameters, @babel/plugin-transform-react-jsx, @babel/plugin-transform-react-jsx-development, @babel/plugin-transform-react-jsx-source, @babel/plugin-transform-shorthand-properties, @babel/plugin-transform-spread, @babel/plugin-transform-template-literals, @babel/preset-flow, @babel/preset-react, @babel/traverse, @rollup/plugin-babel, @rollup/plugin-commonjs, @rollup/plugin-node-resolve, @rollup/plugin-replace, abortcontroller-polyfill, art, babel-plugin-syntax-trailing-function-commas, chalk, cli-table, coffee-script, confusing-browser-globals, core-js, create-react-class, danger, error-stack-parser, eslint, eslint-config-prettier, eslint-plugin-babel, eslint-plugin-eslint-plugin, eslint-plugin-ft-flow, eslint-plugin-jest, eslint-plugin-no-for-of-loops, eslint-plugin-no-function-declare-after-return, eslint-plugin-react, eslint-plugin-react-internal, fbjs-scripts, filesize, flow-bin, flow-remove-types, glob, glob-stream, google-closure-compiler, gzip-size, hermes-eslint, hermes-parser, jest, jest-cli, jest-diff, jest-environment-jsdom, jest-snapshot-serializer-raw, minimatch, minimist, mkdirp, ncp, prettier, prettier-2, pretty-format, prop-types, random-seed, react-lifecycles-compat, rimraf, rollup, rollup-plugin-prettier, rollup-plugin-strip-banner, semver, shelljs, signedsource, targz, through2, tmp, typescript, undici, web-streams-polyfill, yargs
Documentation
A README file for the react code repository. View Code
React · 
React is a JavaScript library for building user interfaces.
- Declarative: React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Declarative views make your code more predictable, simpler to understand, and easier to debug.
- Component-Based: Build encapsulated components that manage their own state, then compose them to make complex UIs. Since component logic is written in JavaScript instead of templates, you can easily pass rich data through your app and keep the state out of the DOM.
- Learn Once, Write Anywhere: We don't make assumptions about the rest of your technology stack, so you can develop new features in React without rewriting existing code. React can also render on the server using Node and power mobile apps using React Native.
Learn how to use React in your project.
Installation
React has been designed for gradual adoption from the start, and you can use as little or as much React as you need:
- Use Quick Start to get a taste of React.
- Add React to an Existing Project to use as little or as much React as you need.
- Create a New React App if you're looking for a powerful JavaScript toolchain.
Documentation
You can find the React documentation on the website.
Check out the Getting Started page for a quick overview.
The documentation is divided into several sections:
- Quick Start
- Tutorial
- Thinking in React
- Installation
- Describing the UI
- Adding Interactivity
- Managing State
- Advanced Guides
- API Reference
- Where to Get Support
- Contributing Guide
You can improve it by sending pull requests to this repository.
Examples
We have several examples on the website. Here is the first one to get you started:
import { createRoot } from 'react-dom/client';
function HelloMessage({ name }) {
return <div>Hello {name}</div>;
}
const root = createRoot(document.getElementById('container'));
root.render(<HelloMessage name="Taylor" />);
This example will render "Hello Taylor" into a container on the page.
You'll notice that we used an HTML-like syntax; we call it JSX. JSX is not required to use React, but it makes code more readable, and writing it feels like writing HTML.
Contributing
The main purpose of this repository is to continue evolving React core, making it faster and easier to use. Development of React happens in the open on GitHub, and we are grateful to the community for contributing bugfixes and improvements. Read below to learn how you can take part in improving React.
Code of Conduct
Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please read the full text so that you can understand what actions will and will not be tolerated.
Contributing Guide
Read our contributing guide to learn about our development process, how to propose bugfixes and improvements, and how to build and test your changes to React.
Good First Issues
To help you get your feet wet and get you familiar with our contribution process, we have a list of good first issues that contain bugs that have a relatively limited scope. This is a great place to get started.
License
React is MIT licensed.