...Get your project documentation looking just the way you want it by customizing your theme and/or installing some plugins. Modify Markdown's behavior with Markdown extensions. Many configuration options are available. The built-in dev-server allows you to preview your documentation as you're writing it. It will even auto-reload and refresh your browser whenever you save your changes.
Isolated React component development environment with a style guide
...Share components with your team, including designers and developers. See how components react to different props and data right in the browser. Find the right combination of props and copy the code.