One thing that people often want to do when they've used React for a while is contribute to the library. React is open source, which means that its source code is public and anyone who's signed the Contributor License Agreement (CLA) can help to fix bugs, write documentation, or even add new features.
You can read the full terms of the CLA at the following URL: https://code.facebook.com/cla.
You need to make sure that any bug you post in React's GitHub repository is 100% replicable. Once you verify this, and if you want to file an issue on GitHub, you can go to https://github.com/facebook/react/issues/new.
As you'll see, the issue comes with some pre-filled instructions, with one of those being to set up the minimal demo. The other questions help you to explain the problem, and to describe current and expected behaviors.
It is important...
