# Vue v3.5.42

- Product: Vue (https://whatsnew.fyi/product/vue-core)
- Vendor: Vue.js
- Date: 2026-08-27
- Version: v3.5.42
- Original notes: https://github.com/vuejs/core/releases/tag/v3.5.42
- Permalink: https://whatsnew.fyi/product/vue-core/releases/v3.5.42

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** — Handle async component unmount before lazy hydration
- **fixed** — Handle moving unresolved async fragment
- **fixed** — Avoid caching unmounted suspense children
- **fixed** — Keep .trim result when combined with .number v-model modifier
- **fixed** — Resolve $el for dev root comment fragment
- **fixed** — Support !important on CSS custom properties in style binding
- **fixed** — Reject CR in attribute names in server-renderer
- **fixed** — Correctly compare Map and Set values
- **fixed** — Don't treat the leaving branch as the fallback while its mount is pending in suspense
- **fixed** — Re-sync select when model is overridden in change handler

###### Bug Fixes

* **hydration:** handle async component unmount before lazy hydration ([#15252](https://github.com/vuejs/core/issues/15252)) ([6e1814a](https://github.com/vuejs/core/commit/6e1814aa355aad8dd32a89873e95267297ae0609))
* **hydration:** handle moving unresolved async fragment ([#15263](https://github.com/vuejs/core/issues/15263)) ([a72036f](https://github.com/vuejs/core/commit/a72036f66bcb9a4f3b3737cda19eeba1bc531e15))
* **runtime-core:** avoid caching unmounted suspense children ([#15291](https://github.com/vuejs/core/issues/15291)) ([b535917](https://github.com/vuejs/core/commit/b535917d46d5c6e28c1d3b9185bfa1665127c73a)), closes [#15288](https://github.com/vuejs/core/issues/15288)
* **runtime-core:** keep .trim result when combined with .number v-model modifier ([#15346](https://github.com/vuejs/core/issues/15346)) ([f8d42e1](https://github.com/vuejs/core/commit/f8d42e1cf2a0ccb43c50fad6e972cb130c53824e))
* **runtime-core:** resolve $el for dev root comment fragment ([#15313](https://github.com/vuejs/core/issues/15313)) ([8654f35](https://github.com/vuejs/core/commit/8654f35118a1165ac30fd398ceaff8849c44d9d5)), closes [#12680](https://github.com/vuejs/core/issues/12680)
* **runtime-dom:** support !important on CSS custom properties in style binding ([#15348](https://github.com/vuejs/core/issues/15348)) ([31da934](https://github.com/vuejs/core/commit/31da934fcbe73ab8ed187bf820c80b24ced474be))
* **server-renderer:** reject CR in attribute names ([#15266](https://github.com/vuejs/core/issues/15266)) ([a2b40db](https://github.com/vuejs/core/commit/a2b40db9a83b36ed9da3a16403cf8f040262d73f))
* **shared:** correctly compare Map and Set values ([#15328](https://github.com/vuejs/core/issues/15328)) ([ef82a26](https://github.com/vuejs/core/commit/ef82a26775952a665545d3771788bd23b2efec91)), closes [#15320](https://github.com/vuejs/core/issues/15320)
* **suspense:** don't treat the leaving branch as the fallback while its mount is pending ([#15333](https://github.com/vuejs/core/issues/15333)) ([cd19745](https://github.com/vuejs/core/commit/cd1974562357dd73101d048f207a694a4e5310ec)), closes [#15332](https://github.com/vuejs/core/issues/15332)
* **v-model:** re-sync select when model is overridden in change handler ([#15298](https://github.com/vuejs/core/issues/15298)) ([6eaecc1](https://github.com/vuejs/core/commit/6eaecc14d8151a7d258b80ce0519e5ecc17a2bef)), closes [#10505](https://github.com/vuejs/core/issues/10505)