Design system (Storybook)

Shared components, tokens and rules that keep a product consistent across screens, teams and platforms.

Tokens hold the decisions (colors, spacing, type), components implement them once, and documentation shows how to use them. Storybook is a common tool for developing and documenting components in isolation, with each state as a story that can also be a test. A design system pays off when several screens or apps share it; for one small app a few well-named components are enough.

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Related terms

Visual regression testing: Automated screenshots of pages or components compared with approved ones, so unintended visual changes fail the build.
Accessibility (a11y): Building software that people with disabilities can use: with a keyboard, a screen reader, zoom or captions.
Monorepo: One repository that holds several apps and shared packages, versioned and changed together.

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