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Contributing to React

React is one of Facebook's first open source projects that is both under very active development and is also being used to ship code to everybody on facebook.com. We're still working out the kinks to make contributing to this project as easy and transparent as possible, but we're not quite there yet. Hopefully this document makes the process for contributing clear and preempts some questions you may have.

Our Development Process

Some of the core team will be working directly on GitHub. These changes will be public from the beginning. Other changesets will come via a bridge with Facebook's internal source control. This is a necessity as it allows engineers at Facebook outside of the core team to move fast and contribute from an environment they are comfortable in.

master is unsafe

We will do our best to keep master in good shape, with tests passing at all times. But in order to move fast, we will make API changes that your application might not be compatible with. We will do our best to communicate these changes and always version appropriately so you can lock into a specific version if need be.

Pull Requests

The core team will be monitoring for pull requests. When we get one, we'll run some Facebook-specific integration tests on it first. From here, we'll need to get another person to sign off on the changes and then merge the pull request. For API changes we may need to fix internal uses, which could cause some delay. We'll do our best to provide updates and feedback throughout the process.

Before submitting a pull request, please make sure the following is done…

  1. Fork the repo and create your branch from master.
  2. If you've added code that should be tested, add tests!
  3. If you've changed APIs, update the documentation.
  4. Ensure the test suite passes (grunt test).
  5. Make sure your code lints (grunt lint) - we've done our best to make sure these rules match our internal linting guidelines.
  6. If you haven't already, complete the CLA.

Contributor License Agreement ("CLA")

In order to accept your pull request, we need you to submit a CLA. You only need to do this once, so if you've done this for another Facebook open source project, you're good to go. If you are submitting a pull request for the first time, just let us know that you have completed the CLA and we can cross-check with your GitHub username.

Complete your CLA here: https://code.facebook.com/cla

Bugs

Where to Find Known Issues

We will be using GitHub Issues for our public bugs. We will keep a close eye on this and try to make it clear when we have an internal fix in progress. Before filing a new task, try to make sure your problem doesn't already exist.

Reporting New Issues

The best way to get your bug fixed is to provide a reduced test case. jsFiddle, jsBin, and other sites provide a way to give live examples. Those are especially helpful though may not work for JSX-based code.

Security Bugs

Facebook has a bounty program for the safe disclosure of security bugs. With that in mind, please do not file public issues and go through the process outlined on that page.

How to Get in Touch

Style Guide

Code

  • Use semicolons;
  • Commas last,
  • 2 spaces for indentation (no tabs)
  • Prefer ' over "
  • "use strict";
  • 80 character line length
  • "Attractive"
  • Do not use the optional parameters of setTimeout and setInterval

Documentation

  • Do not wrap lines at 80 characters

License

By contributing to React, you agree that your contributions will be licensed under the Apache License Version 2.0 (APLv2).