Dan AbramovandGitHub
4b7dac44bc
* Bump deps to Jest 22 * Prevent jsdom from logging intentionally thrown errors This relies on our existing special field that we use to mute errors. Perhaps, it would be better to instead rely on preventDefault() directly. I outlined a possible strategy here: https://github.com/facebook/react/issues/11098#issuecomment-355032539 * Update snapshots * Mock out a method called by ReactART that now throws * Calling .click() no longer works, dispatch event instead * Fix incorrect SVG element creation in test * Render SVG elements inside <svg> to avoid extra warnings * Fix range input test to use numeric value * Fix creating SVG element in test * Replace brittle test that relied on jsdom behavior The test passed in jsdom due to its implementation details. The original intention was to test the mutation method, but it was removed a while ago. Following @nhunzaker's suggestion, I moved the tests to ReactDOMInput and adjusted them to not rely on implementation details. * Add a workaround for the expected extra client-side warning This is a bit ugly but it's just two places. I think we can live with this. * Only warn once for mismatches caused by bad attribute casing We used to warn both about bad casing and about a mismatch. The mismatch warning was a bit confusing. We didn't know we warned twice because jsdom didn't faithfully emulate SVG. This changes the behavior to only leave the warning about bad casing if that's what caused the mismatch. It also adjusts the test to have an expectation that matches the real world behavior. * Add an expected warning per comment in the same test
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.
Documentation
You can find the React documentation on the website.
It is divided into several sections:
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:
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.
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 which have a relatively limited scope. This is a great place to get started.
License
React is MIT licensed.