Question 1

When should I use Storybook vs just testing components in my app?

Accepted Answer

Storybook isolates components from your application context, letting you develop and test them independently. This catches bugs faster, improves reusability, and creates living documentation. Use Storybook for: design system documentation, complex component libraries, visual regression testing. Skip for: simple one-off components in a monolithic app. Best practice: write stories as you build components, not after.

Question 2

How do design systems benefit from Storybook?

Accepted Answer

Storybook becomes your single source of truth for component APIs, variations, and usage. Teams reference Storybook instead of hunting through code. Addons like addon-docs auto-generate prop tables; Chromatic tracks visual changes across versions. Design systems at scale (Shopify, BBC, Airbnb) all use Storybook for governance and consistency.

Question 3

What is Chromatic and why should I use it?

Accepted Answer

Chromatic is Storybook's visual regression testing service. It captures screenshots of every story, detects visual changes on every commit, and prevents regressions from reaching production. Integrates with CI/CD (GitHub, GitLab, etc.). Cost: ~$5-10/month per project. Alternative: self-host visual tests with Percy or BackstopJS, but Chromatic is optimized for Storybook.

Question 4

How do I mock APIs in Storybook with MSW?

Accepted Answer

Mock Service Worker (MSW) intercepts fetch/axios calls in your stories without modifying component code. Set up MSW handlers in a .storybook/mocks.ts file, then use in play functions to simulate API responses. Enables realistic story testing without a real backend. Example: play: async ({ canvasElement }) => { msw.use(http.get('/api/users', () => ...)); }

Question 5

What is the difference between args, controls, and play functions?

Accepted Answer

Args: component props passed to stories (e.g. { label: 'Click me' }). Controls: UI inputs in Storybook to modify args interactively (e.g. text field, toggle, color picker). Play functions: automated interactions (clicking, typing, assertions) that run after story renders. Use together: args define defaults, controls let users explore, play functions test behavior.

Question 6

Should I write visual tests or interaction tests first?

Accepted Answer

Visual tests (Chromatic screenshots) catch layout/style regressions; interaction tests (play functions + assertions) verify behavior. Start with play functions during development (faster feedback), add Chromatic for design system governance (slower CI, but catches visual drift). For enterprise: both (play tests in CI + Chromatic on main branch).

Question 7

How does Storybook handle React Server Components?

Accepted Answer

Storybook 8+ supports React Server Components in preview. Client Components work naturally; for Server Components, use mock decorators or isolate client wrappers. Not all RSC features (streaming, Suspense) work in Storybook, test data fetching in Next.js app directly. Storybook excels at Client Components; use app integration tests for Server Component behavior.

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CANADA	C$115k	C$155k	C$205k

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