10.3.0
> Improved developer experience, AI-assisting tools, and broader ecosystem support
Storybook 10.3 contains hundreds of fixes and improvements including:
- 🤖 Storybook MCP: Agentic component dev, docs, and test (Preview release for React)
- ⚡ Vite 8 support
- ▲ Next.js 16.2 support
- 📝 ESLint 10 support
- 〰️ Addon Pseudo-States: Tailwind v4 support
- 🔧 Addon-Vitest: Simplified configuration - no more setup files required
- ♿ Numerous accessibility improvements across the UI
List of all updates
- A11y: Add ScrollArea prop focusable for when it has static children - #33876, thanks @Sidnioulz!
- A11y: Ensure popover dialogs have an ARIA label - #33500, thanks @gayanMatch!
- A11y: Make resize handles for addon panel and sidebar accessible #33980
- A11y: Underline MDX links for WCAG SC 1.4.1 compliance - #33139, thanks @NikhilChowdhury27!
- Actions: Add expandLevel parameter to configure tree depth - #33977, thanks @mixelburg!
- Actions: Fix HandlerFunction type to support async callback props - #33864, thanks @mixelburg!
- Addon-Docs: Add React as optimizeDeps entry - #34176, thanks @valentinpalkovic!
- Addon-Docs: Add support for `sourceState: 'none'` to canvas block parameters - #33627, thanks @quisido!
- Addon-docs: Restore `docs.components` overrides for doc blocks #34111
- Addon-Vitest: Add channel API to programmatically trigger test runs - #33206, thanks @JReinhold!
- Addon-Vitest: Handle additional vitest config export patterns in postinstall - #34106, thanks @copilot-swe-agent!
- Addon-Vitest: Make Playwright `--with-deps` platform-aware to avoid `sudo` prompt on Linux #34121
- Addon-Vitest: Refactor Vitest setup to eliminate the need for a dedicated setup file - #34025, thanks @valentinpalkovic!
- Addon-Vitest: Support Vitest canaries - #33833, thanks @valentinpalkovic!
- Angular: Add moduleResolution: bundler to tsconfig - #34085, thanks @valentinpalkovic!
- Angular: only load webpack dependencies on demand - #34043, thanks @sod!
- Angular: Storybook fails with unknown option silent - #33736, thanks @tanujbhaud!
- Build: Update @types/node - #34037, thanks @valentinpalkovic!
- Builder-Vite: Centralize Vite plugins for builder-vite and addon-vitest - #33819, thanks @valentinpalkovic!
- Builder-Vite: Fix cold-cache vitest failures for story paths containing glob special characters - #34044, thanks @copilot-swe-agent!
- Builder-Vite: Use preview annotations as entry points for optimizeDeps - #33875, thanks @copilot-swe-agent!
- CI: declare explicit permissions for stale and weekly cron workflows - #33902, thanks @Rohan5commit!
- CLI: Add vike CLI metadata - #34189, thanks @yannbf!
- CLI: Avoid hanging of postinstall during init - #34175, thanks @valentinpalkovic!
- CLI: Fix onboarding not opening - #33609, thanks @ndelangen!
- CLI: Show multiple favicons warning as debug message - #34069, thanks @remino!
- Cli: Use npm for registry URL in PNPMProxy to avoid workspace errors - #33571, thanks @ia319!
- Controls: Allow story argTypes to override control: false from meta - #33729, thanks @jonathan-fulton!
- Controls: Fix Object contrast issue and tidy up code - #33923, thanks @Sidnioulz!
- Core: Ensure telemetry is never triggered on initial load of checklist data - #33918, thanks @ghengeveld!
- Core: Fix event source URL based on refId when multiple iframes share the same origin #34105
- Core: Fix false-positive CJS warning when 'exports' appears in strings or comments - #33572, thanks @reeseo3o!
- Core: Fix handling complex viewport sizes #33615
- Core: Fix iframe reference for composed Storybook on a subpath #34100
- Core: Fix typos: occured -> occurred, recieves -> receives - #33727, thanks @jonathan-fulton!
- Core: Handle BROWSER=none correctly and improve error messages - #33730, thanks @jonathan-fulton!
- Core: Ignore empty files when indexing - #33782, thanks @JReinhold!
- Core: Register CORS middleware before index.json route - #33728, thanks @jonathan-fulton!
- Core: Revert Pull Request #33420 from Maelryn/fix/copy-button-overlap - #33877, thanks @Sidnioulz!
- Core: Zoom tool refinements - Hide reset button when value is initial - #33635, thanks @superLipbalm!
- Docs: Edit JSON button is now accessible at 320x256 viewport (WCAG 2.1 Reflow test) - #33707, thanks @TheSeydiCharyyev!
- Docs: Make CSS ordering in DocsContainer more predictable #34015
- ESLint-plugin: Disallow extra properties in eslint plugin rule options - #32056, thanks @andreww2012!
- ESLint: bail out config setup if eslint-plugin-storybook is already imported - #34089, thanks @copilot-swe-agent!
- HMR: Fix race conditions causing stale play functions to fire on re-rendered stories - #33930, thanks @copilot-swe-agent!
- Maintenance: Revert pull request #33930 HMR events - #34190, thanks @yannbf!
- Maintenance: Use std-env for AI agent detection in telemetry #34114
- Manifest: Add docs entries to debugger - #33607, thanks @JReinhold!
- Manifest: Rename `experimentalComponentsManifest` → `componentsManifest`, default to `true` #33974
- Manifests: Fix Attached MDX causing wrong component entries #34101
- Next.js-Vite: Fix failing postcss mutation - #33879, thanks @valentinpalkovic!
- Next.js: Move image configuration from FrameworkOptions to parameters #32639, thanks @y-hsgw!
- Preact: Support inferring props from component types - #33828, thanks @JoviDeCroock!
- React Native Web: Fix inconsistent example stories - #33891, thanks @danielalanbates!
- React: Add react-docgen-typescript to component manifest - #33818, thanks @kasperpeulen!
- Revert "Toolbar: Remove extra toolbar divider when zoom controls not shown" - #34099, thanks @valentinpalkovic!
- Test: Fix clearing mocks in Vitest #34078
- Test: Update @testing-library/jest-dom - #33928, thanks @valentinpalkovic!
- Theming: Export interface declaration for `ThemesGlobals` - #33343, thanks @icopp!
- Toolbar: Remove extra toolbar divider when zoom controls not shown - #33731, thanks @jonathan-fulton!
- UI: Allow direct kb/mouse actions on zoom tool button - #33496, thanks @Sidnioulz!
- UI: Avoid large animation for reduced motion users - #33530, thanks @Sidnioulz!
- UI: Ensure Link without href is keyboard-reachable - #34163, thanks @Sidnioulz!
- UI: Fix `z-index` problem with `popover`s and `modal`s nesting - #33757, thanks @ndelangen!
- UI: Fix code/copy buttons overlap with content - #33889, thanks @Sidnioulz!
- UI: Fix Copy button overlapping code in portrait mode - #33420, thanks @Maelryn!
- UI: Fix modal text selection - #33967, thanks @Sidnioulz!
- UI: Fix tab navigation after closing addon panel - #33971, thanks @copilot-swe-agent!
- UI: Handle kb nav edge cases when preview and panel are hidden - #33588, thanks @Sidnioulz!
- UI: Hide addon panel Drag on pages without a panel - #34162, thanks @Sidnioulz!
- UI: Hide manifest tag for now - #34165, thanks @Sidnioulz!
- UI: Make disabled Buttons keyboard-focusable - #34166, thanks @Sidnioulz!
- UI: Make TagsFilter state persistent #33374
- UI: Use correct selector for addon panel focus check - #34164, thanks @Sidnioulz!
- UI: Zoom faster when pressing shift - #34185, thanks @Sidnioulz!
- Viewport: Skip viewport validation before parameters load - #33794, thanks @ia319!
- Vite: Add mock entries to optimizeDeps.entries - #34167, thanks @valentinpalkovic!
- Vue3-Vite: Allow paths in docgen tsconfig option #32310, thanks @Thomaash!