# Storybook v10.5.9

- Product: Storybook (https://whatsnew.fyi/product/storybook)
- Vendor: Storybook
- Date: 2026-08-18
- Version: v10.5.9
- Original notes: https://github.com/storybookjs/storybook/releases/tag/v10.5.9
- Permalink: https://whatsnew.fyi/product/storybook/releases/v10.5.9

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Addon-Pseudo-States: Fix pseudo-states rewriting for nested functional selectors
- **fixed** — Core: Skip module-graph reverse-index mirror when a patch is a no-op
- **changed** — Core: Split module-graph into hot revisions and cold index services
- **fixed** — Preview: Fix crash when initialising UrlStore on a docs path
- **fixed** — Pseudo-States: Make stylesheet rewrites WebKit-safe
- **fixed** — TanStack: Keep the layout id when cloning a standalone index file route
- **fixed** — TanStack: Render real link hrefs in the Link mock
- **fixed** — Webpack: Prevent long preview output filenames

##### 10.5.9

- Addon-Pseudo-States: Fix pseudo-states rewriting for nested functional selectors - [#34318](https://github.com/storybookjs/storybook/pull/34318), thanks @filipw01!
- Core: Skip module-graph reverse-index mirror when a patch is a no-op - [#35825](https://github.com/storybookjs/storybook/pull/35825), thanks @ndelangen!
- Core: Split module-graph into hot revisions and cold index services - [#35831](https://github.com/storybookjs/storybook/pull/35831), thanks @ndelangen!
- Preview: Fix crash when initialising UrlStore on a docs path - [#35521](https://github.com/storybookjs/storybook/pull/35521), thanks @TheSeydiCharyyev!
- Pseudo-States: Make stylesheet rewrites WebKit-safe - [#35629](https://github.com/storybookjs/storybook/pull/35629), thanks @ethriel3695!
- TanStack: Keep the layout id when cloning a standalone index file route - [#35660](https://github.com/storybookjs/storybook/pull/35660), thanks @Insik-Han!
- TanStack: Render real link hrefs in the Link mock - [#35505](https://github.com/storybookjs/storybook/pull/35505), thanks @unpunnyfuns!
- Webpack: Prevent long preview output filenames - [#35533](https://github.com/storybookjs/storybook/pull/35533), thanks @zhangli091011!