Storybook for documenting components

Storybook is an open-source tool that lets you build UI components in isolation, without spinning up the full application. Each component is documented through "stories": representations of a component in a specific state or variant.

Its core value is twofold. For developers, it provides a fast development environment to iterate on a component without depending on the rest of the application. For product and design teams, it offers a browsable catalogue of every available component with its variants and usage rules.

Storybook supports React, Vue, Angular, Svelte, Web Components and more. Installation takes a single command (npx storybook@latest init) that detects your framework and configures everything automatically. The result is a .storybook folder with the configuration and an independent dev server.

The main configuration lives in .storybook/main.ts, where you define which files contain stories (typically *.stories.tsx), which addons to load and framework options. The preview.ts file controls global decorators, default parameters and Storybook’s visual theme.

A story is a function that returns a component rendered with a specific set of props. The Component Story Format (CSF) is the current standard: each file exports a default meta with the component configuration and named exports for each variant.

The best stories cover the component’s real use cases, not just prop variations. Include stories for states (loading, error, empty, success), viewport sizes, themes (light/dark) and combinations with other components. Each story should be understandable without reading the source code.

Addons extend Storybook with functionality beyond the core. The essentials (included by default) cover interactive controls, automatic documentation, viewports, backgrounds and actions. Beyond these, there are addons for accessibility, internationalisation, testing and design.

Chromatic is the visual testing platform created by the Storybook maintainers. It captures an image of every story on each build and compares them pixel by pixel against the previous version. When it detects a visual change, it flags it for human review before approval or rejection.

This workflow is especially powerful on pull requests: Chromatic comments on the PR showing which components have changed visually, allowing designers and developers to review before merging. This catches visual regressions that slip through traditional code reviews.

Storybook integrates into your CI pipeline in several ways. The simplest is running npx storybook build to generate a static site you can deploy anywhere. The most advanced includes visual testing with Chromatic, interaction tests with the Storybook test-runner and automated accessibility checks.

A good practice is publishing each branch’s Storybook as a preview deployment (on Vercel, Netlify or Chromatic) so designers and product managers can review changes without running anything locally.

Storybook is only as useful as the effort you put into maintaining it. Outdated or incomplete stories erode trust and lead teams to stop consulting it. Treat stories as part of the definition of done for every component: it is not finished until its stories are up to date.

Avoid creating stories that depend on external data or APIs. Stories should be deterministic and reproducible. Use mock data and decorators to simulate contexts (providers, themes, auth states) without depending on external services.