Component Library
A maintained collection of reusable interface components with documented behavior, states and implementation guidance.
A shared component library reduces duplicated design and front-end work, speeds up delivery of new screens and keeps interfaces, accessibility and brand application consistent across products.
A product team builds 45 React components, documents each one's props, states and accessibility notes in Storybook, publishes them as an npm package and adds visual regression tests before each release.
A library without ownership, versioning and adoption support drifts from the products using it. It does not replace design principles and patterns, and too many rigid components can slow teams with legitimate edge cases.
Each component has a name, purpose, variants, states such as hover, disabled and error, and properties, plus code in one or more frameworks and usage guidance. Components are built from design tokens, versioned with semantic versioning and distributed as packages or design-tool libraries. Tools like Storybook render components in isolation for development, review and testing.
Systems Architecture
Nielsen Norman Group — Design Systems 101 — https://www.nngroup.com/articles/design-systems-101/; Storybook — Get started with Storybook — https://storybook.js.org/docs
