You can browse all the components that are implemented in the React PWA Reference Storefront in a public Storybook instance. Storybook is a third-party, open-source tool for developing, testing, and displaying UI components independently of a storefront or other application. In general, a story in Storybook displays a single visual state of a component.
Developers can download and host a local instance of Storybook. They can update the local instance with custom components and changes to the styles of the standard components.
Note: Storybook is optional. You can consume the UI components for the storefront without using Storybook.
For more information about Storybook, see Browse Storybook.