storybook

Storybook 10 contains one breaking change: it’s ESM-only. This simplifies our distribution and reduces install size by 29% while simultaneously unminifying dist code for easier debugging.
It also includes features to level up your UI development, documentation, and testing workflows:

• 🧩 Module automocking for easier testing

• 🏭 Typesafe CSF factories Preview for React

• 💫 UI editing and sharing optimizations

• 🏷️ Tag filtering exclusion and configuration for sidebar management

• 🔀 Next 16, Vitest 4, Svelte async components, and more!

List of all updates

• A11Y: Bugfix missing manager.js entry-file

• A11y: Persist tab/highlight across docs navigation

• Addon A11y: Prevent setting highlights for old results

• Addon Docs: Fix Symbol conversion issue in docs page and controls panel

• Addon Vitest: Fix incorrect file modifications during setup

• Addon Vitest: Support modifying mergeConfig on addon setup

• Addon-docs: Add eject button to canvas toolbar

• AddonA11Y: Fix postinstall

• AddonViewport: Stricter types

• Angular: Add fileURLToPath for preview annotation paths

• Angular: Fix entry.polyfills undefined error

• Angular: Inherit options from browserTarget

• AutoMigration: Fix sb10 migration when main config contains require

• Cleanup: Remove duplicated entrypoints in core

• CLI: Add addon-console automigration

• CLI: Avoid mixed CSF in files with unconventional stories

• CLI: Change message in downgrade-blocker

• CLI: CSF factories codemod - support annotations in npx context

• CLI: Fix CSF factories addon syncing in storybook add command

• CLI: Fix throwing in readonly environments

• CLI: Init not running dev when it should fixed

• CLI: Make relative imports default in csf-factories codemod

• CLI: Switch over to modern-tar

• Codemod: Replace globby with tinyglobby

• Controls: Allow primitive values of ReactNode argType

• Controls: Fix adding new values to arrays

• Core: Add "open in editor" feature

• Core: Add parameter typings for addon-pseudo-state

• Core: Dedupe aria-query and @testing-library/dom packages

• Core: Enhance warning for Testing Library's screen usage in docs mode

• Core: Ensure valid QR code URL

• Core: Fix external-globals-plugin handle undefined cache dir

• Core: Fix Node 24 deprecation warning

• Core: Fix staticCopy not copying index.html to sub directory

• Core: Fix stepping back through story interactions panel

• Core: Improve addon detection in automigrations on windows

• Core: Improve es-toolkit usage for better tree-shaking

• Core: Join framework preset path with slash

• Core: Make subtype an optional property on an index input

• deprecated

  Core: Mark pnp support as deprecated

• Core: Prevent BAIL state from showing in interactions panel when switching stories

• Core: Prevent navigating to hidden (filtered) item

• Core: Remove CJS bundles, only ship ESM

• Core: Replace es-toolkit compat imports with non-compat

• Core: Switch from mlly to exsolve

• Core: Update tags filter UI

• Core: Use exsolve resolveModulePath for safeResolveModule

• Core: Various QA fixes

• CoreServer: Fix Arc can't get every window

• CSF: Add Storybook test syntax (Storybook v10)

• CSF: Enhance config-to-csf-factory to support type wrappers

• Dts: Ensure .tsx files emit .d.ts type files

• Allow proceeding without selecting automigrations in upgrade command

• ESLint plugin homepage URL updates

• Incorrect URLS for the upgrade command

• Maintenance: Fix bundle size bloat caused by SyntaxHighlighter (createElement)

• Maintenance: Hotfix for missing nextjs dts files, thanks @ndelangen!

• removed

  Maintenance: Remove globalization for dropped entrypoints

• Mock: Catch errors when transforming preview files

• Modernize: Replace fs-extra with native APIs

• Move: Addon jest into it's own repository

• Next.js-vite: Use fileURLToPath for module resolution in preset

• Next.js: Avoid multiple webpack versions at runtime

• Next.js: Remove next/config usage in Next.js >=v16 projects

• Next.js: Return mocked router instead of actual router in useRouter

• Nextjs: Fix config access for Vite

• Nextjs: Fix Nextjs version detection with prereleases

• Onboarding: Prevent confetti overlay from intercepting pointer events

• Onboarding: Tweak referral wording in survey

• PreactVite: Add node entry point

• Presets: Support extensionless imports in TS-based presets

• React Native: Fix document reference error in open-in-editor

• React: Simplify version detection

• Replace: Use empathic over find-up

• Svelte: Improve support for async components

• Svelte: Simplify public types - use modern Component

• SvelteKit: Add support for mocking $app/state

• SvelteKit: Fix set_context_after_init error when experimental async is enabled

• Tags: Remove undocumented x-only tags

• Telemetry: Improve dev cancellation handling

• Telemetry: Send index stats on dev exit

• UI: Allow showing or hiding the addon panel

• UI: Improve sidebar empty state

• UI: Improve syntax-highlighter bundling

• Update: Satellite repos after major version bump

• Upgrade: Enhance ESM compatibility checks and banner generation

• Upgrade: Packages open

• Upgrades: Packages boxen commander giget

• Vite: Optimize @storybook/addon-docs/blocks dependency