Storybook Has a Free UI Development Environment — Test Components in Isolation

Storybook lets you develop and test UI components without running your full app. Visual testing, documentation, and interaction tests — all in one tool. The Problem You want to test a modal component. Without Storybook: Start your entire app Navigate to the page with the modal Click the button that opens it Hope the API returns the right data Check if it looks right With Storybook: open the modal story. It renders instantly with mock data. Test every state. What You Get for Free Component isolation — render any component with any props, any state Auto-generated docs — component API documentation from your code Visual testing — catch CSS regressions with snapshots Interaction testing — simulate user interactions in stories Accessibility testing — a11y addon checks WCAG compliance Works with everything — React, Vue, Angular, Svelte, Web Components Quick Start npx storybook@latest init This detects your framework and sets up everything. Writing Stories // Button.stories.tsx import type {