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9.1.0

Storybook 9.1 is packed with new features and improvements to enhance accessibility, streamline testing, and make your development workflow even smoother!

🚀 Improved upgrade command with monorepo support for seamless upgrades 🅰 Angular fixes for Tailwind 4, cache busting, and zoneless compatibility 🧪 sb.mock API and Automocking: one-line module mocking to simplify your testing workflow 🧪 Favicon shows test run status for quick visual feedback ⚛️ Easier configuration for React Native projects 🔥 Auto-abort play functions on HMR to avoid unwanted side effects 🏗️ Improved CSF factories API for type safe story definitions ♿️ A11y improvements across Storybook’s UI — addon panel, toolbar, sidebar, mobile & more 💯 Dozens more fixes and improvements based on community feedback!

List of all updates - A11y: Improved toolbar a11y by fixing semantics - [#28672](https://github.com/storybookjs/storybook/pull/28672), thanks @mehm8128! - Addon Vitest: Remove Optimize deps candidates due to Vitest warnings - [#31809](https://github.com/storybookjs/storybook/pull/31809), thanks @valentinpalkovic! - Angular: Bundle using TSup - [#31690](https://github.com/storybookjs/storybook/pull/31690), thanks @ndelangen! - Angular: Prevent directory import in Angular builders - [#32012](https://github.com/storybookjs/storybook/pull/32012), thanks @ghengeveld! - Automigration: Await updateMainConfig in removeEssentials - [#32140](https://github.com/storybookjs/storybook/pull/32140), thanks @valentinpalkovic! - Builder-Vite: Fix logic related to setting allowedHosts when IP address used - [#31472](https://github.com/storybookjs/storybook/pull/31472), thanks @JSMike! - Controls: Improve the accessibility of the object control - [#31581](https://github.com/storybookjs/storybook/pull/31581), thanks @Sidnioulz! - Core: Abort play function on HMR - [#31542](https://github.com/storybookjs/storybook/pull/31542), thanks @ghengeveld! - Core: Avoid pausing animations in non-Vitest Playwright environments - [#32123](https://github.com/storybookjs/storybook/pull/32123), thanks @ghengeveld! - Core: Cleanup of type following up v9 and small verbatimModuleSyntax type fix - [#31823](https://github.com/storybookjs/storybook/pull/31823), thanks @alcpereira! - Core: Fix aria-controls attribute on sidebar nodes to include all children - [#31491](https://github.com/storybookjs/storybook/pull/31491), thanks @candrepa1! - Core: Fix horizontal scrollbar covering part of the toolbar - [#31704](https://github.com/storybookjs/storybook/pull/31704), thanks @Sidnioulz! - Core: Fix moving log file across drives and projectRoot detection on Windows - [#32020](https://github.com/storybookjs/storybook/pull/32020), thanks @ghengeveld! - Core: Prevent interactions panel from flickering and showing incorrect state - [#32150](https://github.com/storybookjs/storybook/pull/32150), thanks @ghengeveld! - Core: Serve dynamic favicon based on testing module status - [#31763](https://github.com/storybookjs/storybook/pull/31763), thanks @ghengeveld! - Core: Support container queries in addon panels - [#23261](https://github.com/storybookjs/storybook/pull/23261), thanks @neil-morrison44! - CSF Factories: Add parameters/globals types, `extend` API, portable stories - [#30601](https://github.com/storybookjs/storybook/pull/30601), thanks @kasperpeulen! - CSF: Improve controls parameters - [#31745](https://github.com/storybookjs/storybook/pull/31745), thanks @kasperpeulen! - CSF: Improve docs parameter types - [#31736](https://github.com/storybookjs/storybook/pull/31736), thanks @kasperpeulen! - CSF: Only add preview annotations to definePreview in csf-factories automigration - [#31727](https://github.com/storybookjs/storybook/pull/31727), thanks @kasperpeulen! - Docs: Update @storybook/icons - [#32144](https://github.com/storybookjs/storybook/pull/32144), thanks @valentinpalkovic! - Docs: Update `react-element-to-jsx-string` - [#31170](https://github.com/storybookjs/storybook/pull/31170), thanks @7rulnik! - Init: Exclude mdx stories when docs feature isn\'t selected during init - [#32142](https://github.com/storybookjs/storybook/pull/32142), thanks @valentinpalkovic! - Maintenance: Add flag to toggle default automigrations - [#32113](https://github.com/storybookjs/storybook/pull/32113), thanks @yannbf! - React Native Web: Simplify config by using vite-plugin-rnw - [#32051](https://github.com/storybookjs/storybook/pull/32051), thanks @dannyhw! - Telemetry: Add automigration errors - [#32103](https://github.com/storybookjs/storybook/pull/32103), thanks @yannbf! - Telemetry: Fix `project.json` for getAbsolutePath - [#31510](https://github.com/storybookjs/storybook/pull/31510), thanks @ndelangen! - Test: Add mock capabilities - [#31987](https://github.com/storybookjs/storybook/pull/31987), thanks @valentinpalkovic! - Test: Consider exports map - [#32157](https://github.com/storybookjs/storybook/pull/32157), thanks @valentinpalkovic! - Test: Fix missing source map for Webpack/Vite mock loaders and plugins - [#32111](https://github.com/storybookjs/storybook/pull/32111), thanks @valentinpalkovic! - Test: Invalidate vite cache for manual mocks - [#32152](https://github.com/storybookjs/storybook/pull/32152), thanks @valentinpalkovic! - Test: Remove source map generation from webpack automock-loader - [#32115](https://github.com/storybookjs/storybook/pull/32115), thanks @valentinpalkovic! - UI: Apply user updates for mobile navigation accessibility - [#31401](https://github.com/storybookjs/storybook/pull/31401), thanks @yatishgoel! - UI: Fix interaction step collapse icon - [#31853](https://github.com/storybookjs/storybook/pull/31853), thanks @AvitalHass! - UI: Visual focus indicators (VFIs) aren\'t visible in high contrast mode (rebase) - [#31848](https://github.com/storybookjs/storybook/pull/31848), thanks @Sidnioulz!
Source: README.md, updated 2025-07-31