Dan Abramov
313611572b
* Move files and tests to more meaningful places * Fix the build Now that we import reconciler via react-reconciler, I needed to make a few tweaks. * Update sizes * Move @preventMunge directive to FB header * Revert unintentional change * Fix Flow coverage I forgot to @flow-ify those files. This uncovered some issues. * Prettier, I love you but you're bringing me down Prettier, I love you but you're bringing me down Like a rat in a cage Pulling minimum wage Prettier, I love you but you're bringing me down Prettier, you're safer and you're wasting my time Our records all show you were filthy but fine But they shuttered your stores When you opened the doors To the cops who were bored once they'd run out of crime Prettier, you're perfect, oh, please don't change a thing Your mild billionaire mayor's now convinced he's a king So the boring collect I mean all disrespect In the neighborhood bars I'd once dreamt I would drink Prettier, I love you but you're freaking me out There's a ton of the twist but we're fresh out of shout Like a death in the hall That you hear through your wall Prettier, I love you but you're freaking me out Prettier, I love you but you're bringing me down Prettier, I love you but you're bringing me down Like a death of the heart Jesus, where do I start? But you're still the one pool where I'd happily drown And oh! Take me off your mailing list For kids who think it still exists Yes, for those who think it still exists Maybe I'm wrong and maybe you're right Maybe I'm wrong and maybe you're right Maybe you're right, maybe I'm wrong And just maybe you're right And oh! Maybe mother told you true And there'll always be somebody there for you And you'll never be alone But maybe she's wrong and maybe I'm right And just maybe she's wrong Maybe she's wrong and maybe I'm right And if so, here's this song!
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 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 own project.
Examples
We have several examples on the website. Here is the first one to get you started:
class HelloMessage extends React.Component {
render() {
return <div>Hello {this.props.name}</div>;
}
}
ReactDOM.render(
<HelloMessage name="John" />,
document.getElementById('container')
);
This example will render "Hello John" 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. We recommend using Babel with a React preset to convert JSX into native JavaScript for browsers to digest.
Installation
React is available as the react package on npm. It is also available on a CDN.
React is flexible and can be used in a variety of projects. You can create new apps with it, but you can also gradually introduce it into an existing codebase without doing a rewrite.
The recommended way to install React depends on your project. Here you can find short guides for the most common scenarios:
Contributing
The main purpose of this repository is to continue to evolve 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.
Beginner Friendly Bugs
To help you get your feet wet and get you familiar with our contribution process, we have a list of beginner friendly bugs that contain bugs which are fairly easy to fix. This is a great place to get started.
License
React is MIT licensed.