These are unofficial React Router docs
That means that the docs might contain errors, please use the official docs. Feel free to help out, just send the PR with suggested changes. Once the docs are good enough they might be merged in to the main React Router repo.
These docs cover React Router v2.x.x
There will be live examples
React Router is a powerful routing library built on top of React that helps you add new screens and flows to your application incredibly quickly, all while keeping the URL in sync with what's being displayed on the page.