storybook

Features

• Web-components: Dynamic source snippets (#15337)

Maintenance

• Essentials: Add measure addon to monorepo (#15545)

Bug Fixes

• Addon-docs/Angular: Add unique id to Angular stories (#15501)
• Composition: Fix refs ordering (#15527)

Maintenance

• Essentials: Add outline addon to monorepo (#15526)
• Build: Fix cache setup in GitHub Actions workflow (#15523)

Maintenance

• Addon-docs: Cache DocsContext on window to prevent duplication (#15428)

Bug Fixes

• Webpack5: Quit process after finishing a static build (#15483)
• Addon-docs/Angular: Fix numeric args default value handling (#15491)
• Angular: Fix circular reference not being handled in moduleMetadata (#15410)
• Core: Fix double rebuilds by removing aggregateTimeout (#15372)
• CLI: Fix NPM typo (#15461)

Bug Fixes

• Webpack5: Quit process after finishing a static build (#15483)
• Addon-docs/Angular: Fix numeric args default value handling (#15491)

Maintenance

• Angular: Make Ivy work by default in the angular-cli example (#15280)
• Official-storybook: Fix shortcut for navigating to previous language (#15489)
• Addon-docs: Add docs to standalone example (#7848)
• Build: Update Yarn cache setup in GitHub Actions workflow (#15480)

Bug Fixes

• UI: Fix sidebar toggle in fullscreen mode (#15459)
• Angular: Fix circular reference not being handled in moduleMetadata (#15410)

Maintenance

• Addon-a11y: Reverse help and description labels in accordion (#15466)

Features

• UI: Display menu icon on the toolbar when the sidebar is collapsed (#15369)

Bug Fixes

• Core: Fix double rebuilds by removing aggregateTimeout (#15372)
• CLI: Fix NPM typo (#15461)

Maintenance

• Addon-docs: Cache DocsContext on window to prevent duplication (#15428)

Bug Fixes

• Essentials: Update measure and outline. Fix alt+tab issues on windows. (#15402)
• Core: Fix decorator context update (#15408)
• Revert "Vue3: Update args without re-mounting component" (#15409)
• Upgrade bad release of react-docgen-typescript-plugin (#15432)

Dependency Upgrades

• Upgrade bad release of react-docgen-typescript-plugin (#15432)

Features

• Web-components: Custom Elements Manifest v1 support (#15138)

Bug Fixes

• CSF: Fix auto-title generation for standard config dir (#15430)

Dependency Upgrades

• Upgrade react-docgen-typescript-plugin for refresh perf regression (#15431)

Features

• CSF: Generate default titles based on file path (#15376)

Bug Fixes

• Core: Fix decorator context update (#15408)
• Revert "Vue3: Update args without re-mounting component" (#15409)

Features

• CSF: Add stories.json generation for CSF3 stories (#15395)

Bug Fixes

• Essentials: Update measure and outline. Fix alt+tab issues on windows. (#15402)

Bug Fixes

• Core: Only use dotenv-webpack when a user has a dotenv file (#15365)
• Essentials: Update addon measure and outline (#15354)
• Actions: Don't override existing action args (#15394)
• Svelte: Fix argType.type.name extraction (#15332)
• CSF3: Genericize feature flagging and fix webpack5 (#15375)
• Webpack5: Fix warnings typo (#15374)
• UI: Fix navigation after no story error (#15349)
• CSF3: Rename setup to play (#15358)
• Upgrade dotenv-webpack to 7.0.x (#15343)

Bug Fixes

• Actions: Don't override existing action args (#15394)

Bug Fixes

• CSF3: Genericize feature flagging and fix webpack5 (#15375)
• Webpack5: Fix warnings typo (#15374)

Bug Fixes

• Core: Only use dotenv-webpack when a user has a dotenv file (#15365)

Maintenance

• CSF3: Rename setup to play (#15358)

Bug Fixes

• Essentials: Update addon measure and outline (#15354)
• UI: Fix navigation after no story error (#15349)

Bug Fixes

• Svelte: Fix argType.type.name extraction (#15332)

Dependency Upgrades

• Upgrade dotenv-webpack to 7.0.x (#15343)

Optimized for UI development

SB6.3 adds new UI development and testing features, while evolving with the JS ecosystem:

• 📐 Layout debugging with Measure and Outline addons
• 🔌 Reuse your stories in unit tests: Jest, Cypress & more
• 🚀 Frameworks: Angular 12 Ivy, Lit2 web components
• 🛠 Builders: Webpack5 stable, Vite community
• 📦 Packaging: Modern ESM

It also contains hundreds more fixes, features, and tweaks. Browse the changelogs matching 6.3.0-alpha.*, 6.3.0-beta.*, and 6.3.0-rc.* for the full list of changes. See Storybook 6 migration guide to upgrade from 5.x or MIGRATION.md for detailed migration instructions.