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Props are mutable in the template #10736

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quiteeasy opened this issue Apr 19, 2024 · 2 comments
Closed

Props are mutable in the template #10736

quiteeasy opened this issue Apr 19, 2024 · 2 comments

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@quiteeasy
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Vue version

3.4.23

Link to minimal reproduction

https://play.vuejs.org/#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

Steps to reproduce

  1. Click on the Mutate Prop in the template(no warning, ref mutated) button
  2. Click on the Mutate Prop with accessing props in the script(you will see a warning, the ref will not be mutated) button

What is expected?

Both attempts to mutate the prop shows warning and block mutating

What is actually happening?

the Mutate Prop in the template(no warning, ref mutated) button mutates the prop without any warnings

System Info

No response

Any additional comments?

I would like to submit two possible pull requests (PRs):

  1. For the main branch:
    • Introduce a temporary warning when attempting to mutate data from the main branch.
    • This warning will serve as an interim solution until a more permanent fix is implemented to prevent unintended data mutations.
  2. For the minor branch:
    • Implement a fix that blocks data mutations from the minor branch.
    • This fix will prevent unintended data changes, similar to the existing protection against mutating data from scripts.
    • Note: This change may break existing functionality for users who directly mutate props in the template. We should communicate this potential breaking change and guide the new recommended practices.

This approach addresses the issue on both branches, providing a short-term warning for the main branch while implementing a comprehensive solution for the minor branch. However, the fix for the minor branch may require additional documentation and migration efforts due to the potential breaking change.

Looking forward to the feedback from the team.

@skirtles-code
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I think this may be the same problem described by #8216.

@quiteeasy
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I think this may be the same problem described by #8216.

Yes, this seems to be the same issue described in #8216. The PR from #8216 will prevent mutating props passed to child components in development mode. However, it appears to be problematic for production, as the state update will be asynchronous(parent and child states are not synced), as demonstrated in the reproduction link from #8216.

Should we consider disallowing the mutation of props passed to child components in the next minor release to avoid such issues?

danroux pushed a commit to danroux/sk8l-ui that referenced this issue May 8, 2024
## [3.4.27](vuejs/core@v3.4.26...v3.4.27) (2024-05-06)

### Bug Fixes

* **compat:** include legacy scoped slots ([#10868](vuejs/core#10868)) ([8366126](vuejs/core@8366126)), closes [#8869](vuejs/core#8869)
* **compiler-core:** add support for arrow aysnc function with unbracketed ([#5789](vuejs/core#5789)) ([ca7d421](vuejs/core@ca7d421)), closes [#5788](vuejs/core#5788)
* **compiler-dom:** restrict createStaticVNode usage with option elements ([#10846](vuejs/core#10846)) ([0e3d617](vuejs/core@0e3d617)), closes [#6568](vuejs/core#6568) [#7434](vuejs/core#7434)
* **compiler-sfc:** handle keyof operator ([#10874](vuejs/core#10874)) ([10d34a5](vuejs/core@10d34a5)), closes [#10871](vuejs/core#10871)
* **hydration:** handle edge case of style mismatch without style attribute ([f2c1412](vuejs/core@f2c1412)), closes [#10786](vuejs/core#10786)

## [3.4.26](vuejs/core@v3.4.25...v3.4.26) (2024-04-29)

### Bug Fixes

* **compiler-core:** fix bail constant for globals ([fefce06](vuejs/core@fefce06))
* **compiler-core:** remove unnecessary constant bail check ([09b4df8](vuejs/core@09b4df8)), closes [#10807](vuejs/core#10807)
* **runtime-core:** attrs should be readonly in functional components ([#10767](vuejs/core#10767)) ([e8fd644](vuejs/core@e8fd644))
* **runtime-core:** ensure slot compiler marker writable ([#10825](vuejs/core#10825)) ([9c2de62](vuejs/core@9c2de62)), closes [#10818](vuejs/core#10818)
* **runtime-core:** properly handle inherit transition during clone VNode ([#10809](vuejs/core#10809)) ([638a79f](vuejs/core@638a79f)), closes [#3716](vuejs/core#3716) [#10497](vuejs/core#10497) [#4091](vuejs/core#4091)
* **Transition:** re-fix [#10620](vuejs/core#10620) ([#10832](vuejs/core#10832)) ([accf839](vuejs/core@accf839)), closes [#10632](vuejs/core#10632) [#10827](vuejs/core#10827)

## [3.4.25](vuejs/core@v3.4.24...v3.4.25) (2024-04-24)

### Bug Fixes

* **defineModel:** align prod mode runtime type generation with defineProps ([4253a57](vuejs/core@4253a57)), closes [#10769](vuejs/core#10769)
* **runtime-core:** properly get keepAlive child ([#10772](vuejs/core#10772)) ([3724693](vuejs/core@3724693)), closes [#10771](vuejs/core#10771)
* **runtime-core:** use normal object as internal prototype for attrs and slots ([064e82f](vuejs/core@064e82f)), closes [/github.com/vuejs/core/commit/6df53d85a207986128159d88565e6e7045db2add#r141304923](https://github.com//github.com/vuejs/core/commit/6df53d85a207986128159d88565e6e7045db2add/issues/r141304923)

## [3.4.24](vuejs/core@v3.4.23...v3.4.24) (2024-04-22)

### Bug Fixes

* **compiler-core:** handle template ref bound via v-bind object on v-for ([#10706](vuejs/core#10706)) ([da7adef](vuejs/core@da7adef)), closes [#10696](vuejs/core#10696)
* **compiler-core:** properly parse await expressions in edge cases ([b92c25f](vuejs/core@b92c25f)), closes [#10754](vuejs/core#10754)
* **compiler-sfc:** handle readonly operator and ReadonlyArray/Map/Set types ([5cef52a](vuejs/core@5cef52a)), closes [#10726](vuejs/core#10726)
* **compiler-ssr:** fix hydration mismatch for conditional slot in transition ([f12c81e](vuejs/core@f12c81e)), closes [#10743](vuejs/core#10743)
* **compiler-ssr:** fix v-html SSR for nullish values ([1ff4076](vuejs/core@1ff4076)), closes [#10725](vuejs/core#10725)
* **deps:** update compiler ([#10760](vuejs/core#10760)) ([15df5c1](vuejs/core@15df5c1))
* **runtime-core:** fix edge case of KeepAlive inside Transition with slot children ([#10719](vuejs/core#10719)) ([e51ca61](vuejs/core@e51ca61)), closes [#10708](vuejs/core#10708)
* **runtime-core:** further fix slots _ctx check ([cde7f05](vuejs/core@cde7f05)), closes [#10724](vuejs/core#10724)
* **runtime-core:** props should be readonly via direct template access ([b93f264](vuejs/core@b93f264)), closes [#8216](vuejs/core#8216) [#10736](vuejs/core#10736)
* **transition:** transition is breaking/flickering when enter is canceled ([#10688](vuejs/core#10688)) ([65109a7](vuejs/core@65109a7))

## [3.4.23](vuejs/core@v3.4.22...v3.4.23) (2024-04-16)

### Bug Fixes

* **runtime-core:** fix regression for $attrs tracking in slots ([6930e60](vuejs/core@6930e60)), closes [#10710](vuejs/core#10710)
* **runtime-core:** use same internal object mechanism for slots ([6df53d8](vuejs/core@6df53d8)), closes [#10709](vuejs/core#10709)

## [3.4.22](vuejs/core@v3.4.21...v3.4.22) (2024-04-15)

### Bug Fixes

* **compat:** fix $options mutation + adjust private API initialization ([d58d133](vuejs/core@d58d133)), closes [#10626](vuejs/core#10626) [#10636](vuejs/core#10636)
* **compile-sfc:** analyze v-bind shorthand usage in template ([#10518](vuejs/core#10518)) ([e5919d4](vuejs/core@e5919d4)), closes [#10515](vuejs/core#10515)
* **compiler-core:** fix loc.source for end tags with whitespace before > ([16174da](vuejs/core@16174da)), closes [#10694](vuejs/core#10694) [#10695](vuejs/core#10695)
* **compiler-core:** fix v-bind shorthand for component :is ([04af950](vuejs/core@04af950)), closes [#10469](vuejs/core#10469) [#10471](vuejs/core#10471)
* **compiler-sfc:** :is() and :where() in compound selectors ([#10522](vuejs/core#10522)) ([660cadc](vuejs/core@660cadc)), closes [#10511](vuejs/core#10511)
* **compiler-sfc:** also search for `.tsx` when type import's extension is omitted  ([#10637](vuejs/core#10637)) ([34106bc](vuejs/core@34106bc)), closes [#10635](vuejs/core#10635)
* **compiler-sfc:** fix defineModel coercion for boolean + string union types ([#9603](vuejs/core#9603)) ([0cef65c](vuejs/core@0cef65c)), closes [#9587](vuejs/core#9587) [#10676](vuejs/core#10676)
* **compiler-sfc:** fix universal selector scope ([#10551](vuejs/core#10551)) ([54a6afa](vuejs/core@54a6afa)), closes [#10548](vuejs/core#10548)
* **compiler-sfc:** use options module name if options provide runtimeModuleName options ([#10457](vuejs/core#10457)) ([e76d743](vuejs/core@e76d743)), closes [#10454](vuejs/core#10454)
* **custom-element:** avoid setting attr to null if it is removed ([#9012](vuejs/core#9012)) ([b49306a](vuejs/core@b49306a)), closes [#9006](vuejs/core#9006) [#10324](vuejs/core#10324)
* **hydration:** properly handle optimized mode during hydrate node ([#10638](vuejs/core#10638)) ([2ec06fd](vuejs/core@2ec06fd)), closes [#10607](vuejs/core#10607)
* **reactivity:** computed should not be detected as true by isProxy ([#10401](vuejs/core#10401)) ([9da34d7](vuejs/core@9da34d7))
* **reactivity:** fix hasOwnProperty key coercion edge cases ([969c5fb](vuejs/core@969c5fb))
* **reactivity:** fix tracking when hasOwnProperty is called with non-string value ([c3c5dc9](vuejs/core@c3c5dc9)), closes [#10455](vuejs/core#10455) [#10464](vuejs/core#10464)
* **runtime-core:** fix errorHandler causes an infinite loop during execution ([#9575](vuejs/core#9575)) ([ab59bed](vuejs/core@ab59bed))
* **runtime-core:** handle invalid values in callWithAsyncErrorHandling ([53d15d3](vuejs/core@53d15d3))
* **runtime-core:** show hydration mismatch details for non-rectified mismatches too when __PROD_HYDRATION_MISMATCH_DETAILS__ is set ([#10599](vuejs/core#10599)) ([0dea7f9](vuejs/core@0dea7f9))
* **runtime-dom:** `v-model` string/number coercion for multiselect options ([#10576](vuejs/core#10576)) ([db374e5](vuejs/core@db374e5))
* **runtime-dom:** fix css v-bind for suspensed components ([#8523](vuejs/core#8523)) ([67722ba](vuejs/core@67722ba)), closes [#8520](vuejs/core#8520)
* **runtime-dom:** force update v-model number with leading 0 ([#10506](vuejs/core#10506)) ([15ffe8f](vuejs/core@15ffe8f)), closes [#10503](vuejs/core#10503) [#10615](vuejs/core#10615)
* **runtime-dom:** sanitize wrongly passed string value as event handler ([#8953](vuejs/core#8953)) ([7ccd453](vuejs/core@7ccd453)), closes [#8818](vuejs/core#8818)
* **ssr:** don't render v-if comments in TransitionGroup ([#6732](vuejs/core#6732)) ([5a96267](vuejs/core@5a96267)), closes [#6715](vuejs/core#6715)
* **Transition:** ensure the KeepAlive children unmount w/ out-in mode ([#10632](vuejs/core#10632)) ([fc99e4d](vuejs/core@fc99e4d)), closes [#10620](vuejs/core#10620)
* **TransitionGroup:** avoid set transition hooks for comment nodes and text nodes ([#9421](vuejs/core#9421)) ([140a768](vuejs/core@140a768)), closes [#4621](vuejs/core#4621) [#4622](vuejs/core#4622) [#5153](vuejs/core#5153) [#5168](vuejs/core#5168) [#7898](vuejs/core#7898) [#9067](vuejs/core#9067)
* **types:** avoid merging object union types when using withDefaults ([#10596](vuejs/core#10596)) ([37ba93c](vuejs/core@37ba93c)), closes [#10594](vuejs/core#10594)

### Performance Improvements

* add `__NO_SIDE_EFFECTS__` comments ([#9053](vuejs/core#9053)) ([d46df6b](vuejs/core@d46df6b))
* optimize component props/slots internal object checks ([6af733d](vuejs/core@6af733d))
* **ssr:** avoid calling markRaw on component instance proxy ([4bc9f39](vuejs/core@4bc9f39))
* **ssr:** optimize setup context creation for ssr in v8 ([ca84316](vuejs/core@ca84316))

## [3.4.21](vuejs/core@v3.4.20...v3.4.21) (2024-02-28)

### Bug Fixes

* **runtime-dom:** avoid unset option's value ([#10416](vuejs/core#10416)) ([b3f8b5a](vuejs/core@b3f8b5a)), closes [#10412](vuejs/core#10412) [#10396](vuejs/core#10396)
* **suspense:** ensure nested suspense patching if in fallback state ([#10417](vuejs/core#10417)) ([7c97778](vuejs/core@7c97778)), closes [#10415](vuejs/core#10415)
* **warning:** stringify args in warn handler ([#10414](vuejs/core#10414)) ([bc37258](vuejs/core@bc37258)), closes [#10409](vuejs/core#10409)

## [3.4.20](vuejs/core@v3.4.19...v3.4.20) (2024-02-26)

### Bug Fixes

* **parser:** should not treat uppercase components as special tags ([e0e0253](vuejs/core@e0e0253)), closes [#10395](vuejs/core#10395)
* **runtime-dom:** avoid always resetting nullish option value ([ff130c4](vuejs/core@ff130c4)), closes [#10396](vuejs/core#10396)
* **runtime-dom:** fix nested v-show priority regression ([364f890](vuejs/core@364f890)), closes [#10338](vuejs/core#10338)
* **runtime-dom:** v-bind style should clear previous css string value ([#10373](vuejs/core#10373)) ([e2d3235](vuejs/core@e2d3235)), closes [#10352](vuejs/core#10352)
* **suspense:** handle suspense switching with nested suspense  ([#10184](vuejs/core#10184)) ([0f3da05](vuejs/core@0f3da05)), closes [#10098](vuejs/core#10098)
* **types:** better typing for direct setup signature of defineComponent ([#10357](vuejs/core#10357)) ([eadce5b](vuejs/core@eadce5b)), closes [#8604](vuejs/core#8604) [#8855](vuejs/core#8855)

## [3.4.19](vuejs/core@v3.4.18...v3.4.19) (2024-02-13)

### Bug Fixes

* **deps:** pin lru-cache to avoid hashing error ([b8be990](vuejs/core@b8be990)), closes [#10300](vuejs/core#10300)
* **hydration:** fix css vars hydration mismatch false positive on non-root nodes ([995d2fd](vuejs/core@995d2fd)), closes [#10317](vuejs/core#10317) [#10325](vuejs/core#10325)
* **runtime-dom:** should not trigger transition when v-show value is falsy ([#10311](vuejs/core#10311)) ([e509639](vuejs/core@e509639))

### Features

> Note: this warning is categorized as a feature but released in a patch because it does not affect public APIs.

* **dx:** warn users when computed is self-triggering ([#10299](vuejs/core#10299)) ([f7ba97f](vuejs/core@f7ba97f))

### Performance Improvements

* **runtime:** improve `getType()` GC and speed ([#10327](vuejs/core#10327)) ([603a1e1](vuejs/core@603a1e1))
danroux pushed a commit to danroux/sk8l-ui that referenced this issue May 8, 2024
## [3.4.27](vuejs/core@v3.4.26...v3.4.27) (2024-05-06)

### Bug Fixes

* **compat:** include legacy scoped slots ([#10868](vuejs/core#10868)) ([8366126](vuejs/core@8366126)), closes [#8869](vuejs/core#8869)
* **compiler-core:** add support for arrow aysnc function with unbracketed ([#5789](vuejs/core#5789)) ([ca7d421](vuejs/core@ca7d421)), closes [#5788](vuejs/core#5788)
* **compiler-dom:** restrict createStaticVNode usage with option elements ([#10846](vuejs/core#10846)) ([0e3d617](vuejs/core@0e3d617)), closes [#6568](vuejs/core#6568) [#7434](vuejs/core#7434)
* **compiler-sfc:** handle keyof operator ([#10874](vuejs/core#10874)) ([10d34a5](vuejs/core@10d34a5)), closes [#10871](vuejs/core#10871)
* **hydration:** handle edge case of style mismatch without style attribute ([f2c1412](vuejs/core@f2c1412)), closes [#10786](vuejs/core#10786)

## [3.4.26](vuejs/core@v3.4.25...v3.4.26) (2024-04-29)

### Bug Fixes

* **compiler-core:** fix bail constant for globals ([fefce06](vuejs/core@fefce06))
* **compiler-core:** remove unnecessary constant bail check ([09b4df8](vuejs/core@09b4df8)), closes [#10807](vuejs/core#10807)
* **runtime-core:** attrs should be readonly in functional components ([#10767](vuejs/core#10767)) ([e8fd644](vuejs/core@e8fd644))
* **runtime-core:** ensure slot compiler marker writable ([#10825](vuejs/core#10825)) ([9c2de62](vuejs/core@9c2de62)), closes [#10818](vuejs/core#10818)
* **runtime-core:** properly handle inherit transition during clone VNode ([#10809](vuejs/core#10809)) ([638a79f](vuejs/core@638a79f)), closes [#3716](vuejs/core#3716) [#10497](vuejs/core#10497) [#4091](vuejs/core#4091)
* **Transition:** re-fix [#10620](vuejs/core#10620) ([#10832](vuejs/core#10832)) ([accf839](vuejs/core@accf839)), closes [#10632](vuejs/core#10632) [#10827](vuejs/core#10827)

## [3.4.25](vuejs/core@v3.4.24...v3.4.25) (2024-04-24)

### Bug Fixes

* **defineModel:** align prod mode runtime type generation with defineProps ([4253a57](vuejs/core@4253a57)), closes [#10769](vuejs/core#10769)
* **runtime-core:** properly get keepAlive child ([#10772](vuejs/core#10772)) ([3724693](vuejs/core@3724693)), closes [#10771](vuejs/core#10771)
* **runtime-core:** use normal object as internal prototype for attrs and slots ([064e82f](vuejs/core@064e82f)), closes [/github.com/vuejs/core/commit/6df53d85a207986128159d88565e6e7045db2add#r141304923](https://github.com//github.com/vuejs/core/commit/6df53d85a207986128159d88565e6e7045db2add/issues/r141304923)

## [3.4.24](vuejs/core@v3.4.23...v3.4.24) (2024-04-22)

### Bug Fixes

* **compiler-core:** handle template ref bound via v-bind object on v-for ([#10706](vuejs/core#10706)) ([da7adef](vuejs/core@da7adef)), closes [#10696](vuejs/core#10696)
* **compiler-core:** properly parse await expressions in edge cases ([b92c25f](vuejs/core@b92c25f)), closes [#10754](vuejs/core#10754)
* **compiler-sfc:** handle readonly operator and ReadonlyArray/Map/Set types ([5cef52a](vuejs/core@5cef52a)), closes [#10726](vuejs/core#10726)
* **compiler-ssr:** fix hydration mismatch for conditional slot in transition ([f12c81e](vuejs/core@f12c81e)), closes [#10743](vuejs/core#10743)
* **compiler-ssr:** fix v-html SSR for nullish values ([1ff4076](vuejs/core@1ff4076)), closes [#10725](vuejs/core#10725)
* **deps:** update compiler ([#10760](vuejs/core#10760)) ([15df5c1](vuejs/core@15df5c1))
* **runtime-core:** fix edge case of KeepAlive inside Transition with slot children ([#10719](vuejs/core#10719)) ([e51ca61](vuejs/core@e51ca61)), closes [#10708](vuejs/core#10708)
* **runtime-core:** further fix slots _ctx check ([cde7f05](vuejs/core@cde7f05)), closes [#10724](vuejs/core#10724)
* **runtime-core:** props should be readonly via direct template access ([b93f264](vuejs/core@b93f264)), closes [#8216](vuejs/core#8216) [#10736](vuejs/core#10736)
* **transition:** transition is breaking/flickering when enter is canceled ([#10688](vuejs/core#10688)) ([65109a7](vuejs/core@65109a7))

## [3.4.23](vuejs/core@v3.4.22...v3.4.23) (2024-04-16)

### Bug Fixes

* **runtime-core:** fix regression for $attrs tracking in slots ([6930e60](vuejs/core@6930e60)), closes [#10710](vuejs/core#10710)
* **runtime-core:** use same internal object mechanism for slots ([6df53d8](vuejs/core@6df53d8)), closes [#10709](vuejs/core#10709)

## [3.4.22](vuejs/core@v3.4.21...v3.4.22) (2024-04-15)

### Bug Fixes

* **compat:** fix $options mutation + adjust private API initialization ([d58d133](vuejs/core@d58d133)), closes [#10626](vuejs/core#10626) [#10636](vuejs/core#10636)
* **compile-sfc:** analyze v-bind shorthand usage in template ([#10518](vuejs/core#10518)) ([e5919d4](vuejs/core@e5919d4)), closes [#10515](vuejs/core#10515)
* **compiler-core:** fix loc.source for end tags with whitespace before > ([16174da](vuejs/core@16174da)), closes [#10694](vuejs/core#10694) [#10695](vuejs/core#10695)
* **compiler-core:** fix v-bind shorthand for component :is ([04af950](vuejs/core@04af950)), closes [#10469](vuejs/core#10469) [#10471](vuejs/core#10471)
* **compiler-sfc:** :is() and :where() in compound selectors ([#10522](vuejs/core#10522)) ([660cadc](vuejs/core@660cadc)), closes [#10511](vuejs/core#10511)
* **compiler-sfc:** also search for `.tsx` when type import's extension is omitted  ([#10637](vuejs/core#10637)) ([34106bc](vuejs/core@34106bc)), closes [#10635](vuejs/core#10635)
* **compiler-sfc:** fix defineModel coercion for boolean + string union types ([#9603](vuejs/core#9603)) ([0cef65c](vuejs/core@0cef65c)), closes [#9587](vuejs/core#9587) [#10676](vuejs/core#10676)
* **compiler-sfc:** fix universal selector scope ([#10551](vuejs/core#10551)) ([54a6afa](vuejs/core@54a6afa)), closes [#10548](vuejs/core#10548)
* **compiler-sfc:** use options module name if options provide runtimeModuleName options ([#10457](vuejs/core#10457)) ([e76d743](vuejs/core@e76d743)), closes [#10454](vuejs/core#10454)
* **custom-element:** avoid setting attr to null if it is removed ([#9012](vuejs/core#9012)) ([b49306a](vuejs/core@b49306a)), closes [#9006](vuejs/core#9006) [#10324](vuejs/core#10324)
* **hydration:** properly handle optimized mode during hydrate node ([#10638](vuejs/core#10638)) ([2ec06fd](vuejs/core@2ec06fd)), closes [#10607](vuejs/core#10607)
* **reactivity:** computed should not be detected as true by isProxy ([#10401](vuejs/core#10401)) ([9da34d7](vuejs/core@9da34d7))
* **reactivity:** fix hasOwnProperty key coercion edge cases ([969c5fb](vuejs/core@969c5fb))
* **reactivity:** fix tracking when hasOwnProperty is called with non-string value ([c3c5dc9](vuejs/core@c3c5dc9)), closes [#10455](vuejs/core#10455) [#10464](vuejs/core#10464)
* **runtime-core:** fix errorHandler causes an infinite loop during execution ([#9575](vuejs/core#9575)) ([ab59bed](vuejs/core@ab59bed))
* **runtime-core:** handle invalid values in callWithAsyncErrorHandling ([53d15d3](vuejs/core@53d15d3))
* **runtime-core:** show hydration mismatch details for non-rectified mismatches too when __PROD_HYDRATION_MISMATCH_DETAILS__ is set ([#10599](vuejs/core#10599)) ([0dea7f9](vuejs/core@0dea7f9))
* **runtime-dom:** `v-model` string/number coercion for multiselect options ([#10576](vuejs/core#10576)) ([db374e5](vuejs/core@db374e5))
* **runtime-dom:** fix css v-bind for suspensed components ([#8523](vuejs/core#8523)) ([67722ba](vuejs/core@67722ba)), closes [#8520](vuejs/core#8520)
* **runtime-dom:** force update v-model number with leading 0 ([#10506](vuejs/core#10506)) ([15ffe8f](vuejs/core@15ffe8f)), closes [#10503](vuejs/core#10503) [#10615](vuejs/core#10615)
* **runtime-dom:** sanitize wrongly passed string value as event handler ([#8953](vuejs/core#8953)) ([7ccd453](vuejs/core@7ccd453)), closes [#8818](vuejs/core#8818)
* **ssr:** don't render v-if comments in TransitionGroup ([#6732](vuejs/core#6732)) ([5a96267](vuejs/core@5a96267)), closes [#6715](vuejs/core#6715)
* **Transition:** ensure the KeepAlive children unmount w/ out-in mode ([#10632](vuejs/core#10632)) ([fc99e4d](vuejs/core@fc99e4d)), closes [#10620](vuejs/core#10620)
* **TransitionGroup:** avoid set transition hooks for comment nodes and text nodes ([#9421](vuejs/core#9421)) ([140a768](vuejs/core@140a768)), closes [#4621](vuejs/core#4621) [#4622](vuejs/core#4622) [#5153](vuejs/core#5153) [#5168](vuejs/core#5168) [#7898](vuejs/core#7898) [#9067](vuejs/core#9067)
* **types:** avoid merging object union types when using withDefaults ([#10596](vuejs/core#10596)) ([37ba93c](vuejs/core@37ba93c)), closes [#10594](vuejs/core#10594)

### Performance Improvements

* add `__NO_SIDE_EFFECTS__` comments ([#9053](vuejs/core#9053)) ([d46df6b](vuejs/core@d46df6b))
* optimize component props/slots internal object checks ([6af733d](vuejs/core@6af733d))
* **ssr:** avoid calling markRaw on component instance proxy ([4bc9f39](vuejs/core@4bc9f39))
* **ssr:** optimize setup context creation for ssr in v8 ([ca84316](vuejs/core@ca84316))

## [3.4.21](vuejs/core@v3.4.20...v3.4.21) (2024-02-28)

### Bug Fixes

* **runtime-dom:** avoid unset option's value ([#10416](vuejs/core#10416)) ([b3f8b5a](vuejs/core@b3f8b5a)), closes [#10412](vuejs/core#10412) [#10396](vuejs/core#10396)
* **suspense:** ensure nested suspense patching if in fallback state ([#10417](vuejs/core#10417)) ([7c97778](vuejs/core@7c97778)), closes [#10415](vuejs/core#10415)
* **warning:** stringify args in warn handler ([#10414](vuejs/core#10414)) ([bc37258](vuejs/core@bc37258)), closes [#10409](vuejs/core#10409)

## [3.4.20](vuejs/core@v3.4.19...v3.4.20) (2024-02-26)

### Bug Fixes

* **parser:** should not treat uppercase components as special tags ([e0e0253](vuejs/core@e0e0253)), closes [#10395](vuejs/core#10395)
* **runtime-dom:** avoid always resetting nullish option value ([ff130c4](vuejs/core@ff130c4)), closes [#10396](vuejs/core#10396)
* **runtime-dom:** fix nested v-show priority regression ([364f890](vuejs/core@364f890)), closes [#10338](vuejs/core#10338)
* **runtime-dom:** v-bind style should clear previous css string value ([#10373](vuejs/core#10373)) ([e2d3235](vuejs/core@e2d3235)), closes [#10352](vuejs/core#10352)
* **suspense:** handle suspense switching with nested suspense  ([#10184](vuejs/core#10184)) ([0f3da05](vuejs/core@0f3da05)), closes [#10098](vuejs/core#10098)
* **types:** better typing for direct setup signature of defineComponent ([#10357](vuejs/core#10357)) ([eadce5b](vuejs/core@eadce5b)), closes [#8604](vuejs/core#8604) [#8855](vuejs/core#8855)

## [3.4.19](vuejs/core@v3.4.18...v3.4.19) (2024-02-13)

### Bug Fixes

* **deps:** pin lru-cache to avoid hashing error ([b8be990](vuejs/core@b8be990)), closes [#10300](vuejs/core#10300)
* **hydration:** fix css vars hydration mismatch false positive on non-root nodes ([995d2fd](vuejs/core@995d2fd)), closes [#10317](vuejs/core#10317) [#10325](vuejs/core#10325)
* **runtime-dom:** should not trigger transition when v-show value is falsy ([#10311](vuejs/core#10311)) ([e509639](vuejs/core@e509639))

### Features

> Note: this warning is categorized as a feature but released in a patch because it does not affect public APIs.

* **dx:** warn users when computed is self-triggering ([#10299](vuejs/core#10299)) ([f7ba97f](vuejs/core@f7ba97f))

### Performance Improvements

* **runtime:** improve `getType()` GC and speed ([#10327](vuejs/core#10327)) ([603a1e1](vuejs/core@603a1e1))
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