chore: Merge branch 'main' into edison/fix/13460

.github/workflows/autofix.yml

@@ -11,7 +11,7 @@ jobs:
     env:
       PUPPETEER_SKIP_DOWNLOAD: 'true'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4.1.0
@@ -31,4 +31,4 @@ jobs:
       - name: Run prettier
         run: pnpm run format
 
-      - uses: autofix-ci/action@551dded8c6cc8a1054039c8bc0b8b48c51dfc6ef
+      - uses: autofix-ci/action@635ffb0c9798bd160680f18fd73371e355b85f27

.github/workflows/canary-minor.yml

@@ -1,33 +0,0 @@
-name: canary minor release
-on:
-  # Runs every Monday at 1 AM UTC (9:00 AM in Singapore)
-  schedule:
-    - cron: 0 1 * * MON
-  workflow_dispatch:
-
-jobs:
-  canary:
-    # prevents this action from running on forks
-    if: github.repository == 'vuejs/core'
-    runs-on: ubuntu-latest
-    environment: Release
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          ref: minor
-
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4.1.0
-
-      - name: Install Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version-file: '.node-version'
-          registry-url: 'https://registry.npmjs.org'
-          cache: 'pnpm'
-
-      - run: pnpm install
-
-      - run: pnpm release --canary --publish --tag minor
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/canary.yml

@@ -1,31 +0,0 @@
-name: canary release
-on:
-  # Runs every Monday at 1 AM UTC (9:00 AM in Singapore)
-  schedule:
-    - cron: 0 1 * * MON
-  workflow_dispatch:
-
-jobs:
-  canary:
-    # prevents this action from running on forks
-    if: github.repository == 'vuejs/core'
-    runs-on: ubuntu-latest
-    environment: Release
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4.1.0
-
-      - name: Install Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version-file: '.node-version'
-          registry-url: 'https://registry.npmjs.org'
-          cache: 'pnpm'
-
-      - run: pnpm install
-
-      - run: pnpm release --canary --publish
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4

.github/workflows/release.yml

@@ -21,7 +21,7 @@ jobs:
     environment: Release
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4
@@ -36,12 +36,13 @@ jobs:
       - name: Install deps
         run: pnpm install
 
+      - name: Update npm
+        run: npm i -g npm@latest
+
       - name: Build and publish
         id: publish
         run: |
           pnpm release --publishOnly
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
 
       - name: Create GitHub release
         id: release_tag

.github/workflows/size-data.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4.1.0

.github/workflows/size-report.yml

@@ -22,7 +22,7 @@ jobs:
       github.event.workflow_run.event == 'pull_request' &&
       github.event.workflow_run.conclusion == 'success'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4.1.0
@@ -37,7 +37,7 @@ jobs:
         run: pnpm install
 
       - name: Download Size Data
-        uses: dawidd6/action-download-artifact@v9
+        uses: dawidd6/action-download-artifact@v11
         with:
           name: size-data
           run_id: ${{ github.event.workflow_run.id }}
@@ -56,7 +56,7 @@ jobs:
           path: temp/size/base.txt
 
       - name: Download Previous Size Data
-        uses: dawidd6/action-download-artifact@v9
+        uses: dawidd6/action-download-artifact@v11
         with:
           branch: ${{ steps.pr-base.outputs.content }}
           workflow: size-data.yml

.github/workflows/test.yml

@@ -11,7 +11,7 @@ jobs:
     env:
       PUPPETEER_SKIP_DOWNLOAD: 'true'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4.1.0
@@ -32,7 +32,7 @@ jobs:
     env:
       PUPPETEER_SKIP_DOWNLOAD: 'true'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4.1.0
@@ -54,7 +54,7 @@ jobs:
   e2e-test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Setup cache for Chromium binary
         uses: actions/cache@v4
@@ -85,7 +85,7 @@ jobs:
     env:
       PUPPETEER_SKIP_DOWNLOAD: 'true'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4.1.0

CHANGELOG.md

@@ -1,3 +1,100 @@
+## [3.5.21](https://github.com/vuejs/core/compare/v3.5.20...v3.5.21) (2025-09-02)
+
+
+### Bug Fixes
+
+* **compiler-core:** force dynamic slots when slot referencing scope vars ([#9427](https://github.com/vuejs/core/issues/9427)) ([99d54b2](https://github.com/vuejs/core/commit/99d54b28b46dbea006205dff71c383a31dd1b87a)), closes [#9380](https://github.com/vuejs/core/issues/9380)
+* **compiler-sfc:** check lang before attempt to compile script ([#13508](https://github.com/vuejs/core/issues/13508)) ([55922ff](https://github.com/vuejs/core/commit/55922ff3168a1397ad72f18946eb1c4051cdab3b)), closes [#8368](https://github.com/vuejs/core/issues/8368)
+* **compiler-sfc:** support `${configDir}` in paths for TypeScript 5.5+ ([#13491](https://github.com/vuejs/core/issues/13491)) ([8696e34](https://github.com/vuejs/core/commit/8696e346b4780d88247464490f1a992cc0c3658c)), closes [#13484](https://github.com/vuejs/core/issues/13484)
+* **compiler-sfc:** support global augments with named exports ([#13789](https://github.com/vuejs/core/issues/13789)) ([35da3c6](https://github.com/vuejs/core/commit/35da3c6dcb30030ef60fa22e30aa83a56e396c60))
+* **custom-element:** prevent defineCustomElement from mutating the options object ([#13791](https://github.com/vuejs/core/issues/13791)) ([e322436](https://github.com/vuejs/core/commit/e322436887549c129e61eb58a0084167103451bb))
+* **hmr:** prevent `__VUE_HMR_RUNTIME__` from being overwritten by vue runtime in 3rd-party libraries ([#13817](https://github.com/vuejs/core/issues/13817)) ([1392734](https://github.com/vuejs/core/commit/1392734ae5d5a3b2be124753e198eafa324f6815)), closes [vitejs/vite-plugin-vue#644](https://github.com/vitejs/vite-plugin-vue/issues/644)
+* **hmr:** prevent update unmounting component during HMR reload ([#13815](https://github.com/vuejs/core/issues/13815)) ([ef20b86](https://github.com/vuejs/core/commit/ef20b86b36a127e317f8981df970dc8efd277053)), closes [vitejs/vite-plugin-vue#599](https://github.com/vitejs/vite-plugin-vue/issues/599)
+* **runtime-core:** disable tracking block in h function ([#8213](https://github.com/vuejs/core/issues/8213)) ([8f6b505](https://github.com/vuejs/core/commit/8f6b5050518441a5047d128138da44f798836002)), closes [#6913](https://github.com/vuejs/core/issues/6913)
+* **runtime-core:** use separate emits caches for components and mixins ([#11661](https://github.com/vuejs/core/issues/11661)) ([15fc75f](https://github.com/vuejs/core/commit/15fc75f4031dea805c3bbb67a75e48a9dc307c11))
+* **Suspence:** handle Suspense + KeepAlive HMR updating edge case ([#13076](https://github.com/vuejs/core/issues/13076)) ([5d75a17](https://github.com/vuejs/core/commit/5d75a170c8d23acd11ef2513173d4cbc4d0b54de)), closes [#13075](https://github.com/vuejs/core/issues/13075)
+* **Teleport:** hydrate disabled Teleport with undefined target ([#11235](https://github.com/vuejs/core/issues/11235)) ([00978f7](https://github.com/vuejs/core/commit/00978f7d14e85b49d9d334ea92fa8c03733ce64c)), closes [#11230](https://github.com/vuejs/core/issues/11230)
+* **templateRef:** prevent unnecessary set ref on dynamic ref change or component unmount ([#12642](https://github.com/vuejs/core/issues/12642)) ([93ba107](https://github.com/vuejs/core/commit/93ba10767230872fcdca974a1e19e8bd69b7eb6a)), closes [#12639](https://github.com/vuejs/core/issues/12639)
+* **watch:** use maximum depth for duplicates ([#13434](https://github.com/vuejs/core/issues/13434)) ([f2699a5](https://github.com/vuejs/core/commit/f2699a5cb376ffa452a54feb171c14411c67287c))
+
+
+### Performance Improvements
+
+* improve regexp performance with non-capturing groups ([#13567](https://github.com/vuejs/core/issues/13567)) ([1e8b65a](https://github.com/vuejs/core/commit/1e8b65aa4934c94ef6142b4f49cdfb13ba5e6ce5))
+
+
+
+## [3.5.20](https://github.com/vuejs/core/compare/v3.5.19...v3.5.20) (2025-08-25)
+
+
+### Bug Fixes
+
+* **runtime-dom:** add name to vShow for prop mismatch check ([#13806](https://github.com/vuejs/core/issues/13806)) ([1031e8d](https://github.com/vuejs/core/commit/1031e8de08b735059217b1ad0057f62565c99c4f)), closes [#13805](https://github.com/vuejs/core/issues/13805) re-fix [#13744](https://github.com/vuejs/core/issues/13744) revert [#13777](https://github.com/vuejs/core/issues/13777) 
+
+
+
+## [3.5.19](https://github.com/vuejs/core/compare/v3.5.18...v3.5.19) (2025-08-21)
+
+
+### Bug Fixes
+
+* **compiler-core:** adjacent v-else should cause a compiler error ([#13699](https://github.com/vuejs/core/issues/13699)) ([911e670](https://github.com/vuejs/core/commit/911e67045e2a63e0ecbd198ed4f567530f6d1c17)), closes [#13698](https://github.com/vuejs/core/issues/13698)
+* **compiler-core:** prevent cached array children from retaining detached dom nodes ([#13691](https://github.com/vuejs/core/issues/13691)) ([7f60ef8](https://github.com/vuejs/core/commit/7f60ef83e735dbd29d323347acecf69f22b06d53)), closes [element-plus/element-plus#21408](https://github.com/element-plus/element-plus/issues/21408) [#13211](https://github.com/vuejs/core/issues/13211)
+* **compiler-sfc:** improve type inference for generic type aliases types ([#12876](https://github.com/vuejs/core/issues/12876)) ([d9dd628](https://github.com/vuejs/core/commit/d9dd628800ae32e673bdfabfe79f1988037991d0)), closes [#12872](https://github.com/vuejs/core/issues/12872)
+* **compiler-sfc:** throw mismatched script langs error before invoking babel ([#13194](https://github.com/vuejs/core/issues/13194)) ([0562548](https://github.com/vuejs/core/commit/0562548ab3a040073386021222225e0e9d43c632)), closes [#13193](https://github.com/vuejs/core/issues/13193)
+* **compiler-ssr:** disable v-memo transform in ssr vdom fallback branch ([#13725](https://github.com/vuejs/core/issues/13725)) ([0a202d8](https://github.com/vuejs/core/commit/0a202d890ff2a564b1fab51e4ac621708640818e)), closes [#13724](https://github.com/vuejs/core/issues/13724)
+* **devtools:** clear performance measures ([#13701](https://github.com/vuejs/core/issues/13701)) ([c875019](https://github.com/vuejs/core/commit/c875019d49b4c36a88d929ccadc31ad414747c7b)), closes [#13700](https://github.com/vuejs/core/issues/13700)
+* **hmr:** prevent updating unmounting component during HMR rerender ([#13775](https://github.com/vuejs/core/issues/13775)) ([6e5143d](https://github.com/vuejs/core/commit/6e5143d9635dac3f20fb394a827109df30e232ae)), closes [#13771](https://github.com/vuejs/core/issues/13771) [#13772](https://github.com/vuejs/core/issues/13772)
+* **hydration:** also set vShow name if `__FEATURE_PROD_HYDRATION_MISMATCH_DETAILS__` flag is enabled ([#13777](https://github.com/vuejs/core/issues/13777)) ([439e1a5](https://github.com/vuejs/core/commit/439e1a543e62de4dbf7658d78d05c358c9677c86)), closes [#13744](https://github.com/vuejs/core/issues/13744)
+* **reactivity:** warn on nested readonly ref update during unwrapping ([#12141](https://github.com/vuejs/core/issues/12141)) ([1498821](https://github.com/vuejs/core/commit/1498821ed9eeb22a0767e53ddc1f6a2840598a29))
+* **runtime-core:** avoid setting direct ref of useTemplateRef in dev ([#13449](https://github.com/vuejs/core/issues/13449)) ([4a2953f](https://github.com/vuejs/core/commit/4a2953f57b90dfc24e34ff1a87cc1ebb0b97636d))
+* **runtime-core:** improve consistency of `PublicInstanceProxyHandlers.has` ([#13507](https://github.com/vuejs/core/issues/13507)) ([d7283f3](https://github.com/vuejs/core/commit/d7283f3b7f0631c8b8a4a31a05983dac9f078c4f))
+* **suspense:** don't immediately resolve suspense on last dep unmount ([#13456](https://github.com/vuejs/core/issues/13456)) ([a871315](https://github.com/vuejs/core/commit/a8713159ee24602c7c2b70c5fd52d2e5cd37dca5)), closes [#13453](https://github.com/vuejs/core/issues/13453)
+* **transition:** handle KeepAlive + transition leaving edge case ([#13152](https://github.com/vuejs/core/issues/13152)) ([3190b17](https://github.com/vuejs/core/commit/3190b179b0545a3dc4549737793eec630cf9f0d1)), closes [#13153](https://github.com/vuejs/core/issues/13153)
+
+
+
+## [3.5.18](https://github.com/vuejs/core/compare/v3.5.17...v3.5.18) (2025-07-23)
+
+
+### Bug Fixes
+
+* **compiler-core:** avoid cached text vnodes retaining detached DOM nodes ([#13662](https://github.com/vuejs/core/issues/13662)) ([00695a5](https://github.com/vuejs/core/commit/00695a5b41b2d032deaeada83831ff83aa6bfd4e)), closes [#13661](https://github.com/vuejs/core/issues/13661)
+* **compiler-core:** avoid self updates of `v-pre` ([#12556](https://github.com/vuejs/core/issues/12556)) ([21b685a](https://github.com/vuejs/core/commit/21b685ad9d9d0e6060fc7d07b719bf35f2d9ae1f))
+* **compiler-core:** identifiers in function parameters should not be inferred as references ([#13548](https://github.com/vuejs/core/issues/13548)) ([9b02923](https://github.com/vuejs/core/commit/9b029239edf88558465b941e1e4c085f92b1ebff))
+* **compiler-core:** recognize empty string as non-identifier ([#12553](https://github.com/vuejs/core/issues/12553)) ([ce93339](https://github.com/vuejs/core/commit/ce933390ad1c72bed258f7ad959a78f0e8acdf57))
+* **compiler-core:** transform empty `v-bind` dynamic argument content correctly ([#12554](https://github.com/vuejs/core/issues/12554)) ([d3af67e](https://github.com/vuejs/core/commit/d3af67e878790892f9d34cfea15d13625aabe733))
+* **compiler-sfc:** transform empty srcset w/ includeAbsolute: true ([#13639](https://github.com/vuejs/core/issues/13639)) ([d8e40ef](https://github.com/vuejs/core/commit/d8e40ef7e1c20ee86b294e7cf78e2de60d12830e)), closes [vitejs/vite-plugin-vue#631](https://github.com/vitejs/vite-plugin-vue/issues/631)
+* **css-vars:** nullish v-bind in style should not lead to unexpected inheritance ([#12461](https://github.com/vuejs/core/issues/12461)) ([c85f1b5](https://github.com/vuejs/core/commit/c85f1b5a132eb8ec25f71b250e25e65a5c20964f)), closes [#12434](https://github.com/vuejs/core/issues/12434) [#12439](https://github.com/vuejs/core/issues/12439) [#7474](https://github.com/vuejs/core/issues/7474) [#7475](https://github.com/vuejs/core/issues/7475)
+* **custom-element:** ensure exposed methods are accessible from custom elements by making them enumerable ([#13634](https://github.com/vuejs/core/issues/13634)) ([90573b0](https://github.com/vuejs/core/commit/90573b06bf6fb6c14c6bbff6c4e34e0ab108953a)), closes [#13632](https://github.com/vuejs/core/issues/13632)
+* **hydration:** prevent lazy hydration for updated components ([#13511](https://github.com/vuejs/core/issues/13511)) ([a9269c6](https://github.com/vuejs/core/commit/a9269c642bf944560bc29adb5dae471c11cd9ee8)), closes [#13510](https://github.com/vuejs/core/issues/13510)
+* **runtime-core:** ensure correct anchor el for unresolved async components ([#13560](https://github.com/vuejs/core/issues/13560)) ([7f29943](https://github.com/vuejs/core/commit/7f2994393dcdb82cacbf62e02b5ba5565f32588b)), closes [#13559](https://github.com/vuejs/core/issues/13559)
+* **slots:** refine internal key checking to support slot names starting with an underscore ([#13612](https://github.com/vuejs/core/issues/13612)) ([c5f7db1](https://github.com/vuejs/core/commit/c5f7db11542bb2246363aef78c88a8e6cef0ee93)), closes [#13611](https://github.com/vuejs/core/issues/13611)
+* **ssr:** ensure empty slots render as a comment node in Transition ([#13396](https://github.com/vuejs/core/issues/13396)) ([8cfc10a](https://github.com/vuejs/core/commit/8cfc10a80b9cbf5d801ab149e49b8506d192e7e1)), closes [#13394](https://github.com/vuejs/core/issues/13394)
+
+
+
+## [3.5.17](https://github.com/vuejs/core/compare/v3.5.16...v3.5.17) (2025-06-18)
+
+
+### Bug Fixes
+
+* **compat:** allow v-model built in modifiers on component ([#12654](https://github.com/vuejs/core/issues/12654)) ([cb14b86](https://github.com/vuejs/core/commit/cb14b860f150c4a83bcd52cd26096b7a5aa3a2bf)), closes [#12652](https://github.com/vuejs/core/issues/12652)
+* **compile-sfc:** handle mapped types work with omit and pick ([#12648](https://github.com/vuejs/core/issues/12648)) ([4eb46e4](https://github.com/vuejs/core/commit/4eb46e443f1878199755cb73d481d318a9714392)), closes [#12647](https://github.com/vuejs/core/issues/12647)
+* **compiler-core:** do not increase newlines in `InEntity` state ([#13362](https://github.com/vuejs/core/issues/13362)) ([f05a8d6](https://github.com/vuejs/core/commit/f05a8d613bd873b811cfdb9979ccac8382dba322))
+* **compiler-core:** ignore whitespace when matching adjacent v-if ([#12321](https://github.com/vuejs/core/issues/12321)) ([10ebcef](https://github.com/vuejs/core/commit/10ebcef8c870dbc042b0ea49b1424b2e8f692145)), closes [#9173](https://github.com/vuejs/core/issues/9173)
+* **compiler-core:** prevent comments from blocking static node hoisting  ([#13345](https://github.com/vuejs/core/issues/13345)) ([55dad62](https://github.com/vuejs/core/commit/55dad625acd9e9ddd5a933d5e323ecfdec1a612f)), closes [#13344](https://github.com/vuejs/core/issues/13344)
+* **compiler-sfc:** improved type resolution for function type aliases ([#13452](https://github.com/vuejs/core/issues/13452)) ([f3479aa](https://github.com/vuejs/core/commit/f3479aac9625f4459e650d1c0a70e73863147903)), closes [#13444](https://github.com/vuejs/core/issues/13444)
+* **custom-element:** ensure configureApp is applied to async component ([#12607](https://github.com/vuejs/core/issues/12607)) ([5ba1afb](https://github.com/vuejs/core/commit/5ba1afba09c3ea56c1c17484f5d8aeae210ce52a)), closes [#12448](https://github.com/vuejs/core/issues/12448)
+* **custom-element:** prevent injecting child styles if shadowRoot is false ([#12769](https://github.com/vuejs/core/issues/12769)) ([73055d8](https://github.com/vuejs/core/commit/73055d8d9578d485e3fe846726b50666e1aa56f5)), closes [#12630](https://github.com/vuejs/core/issues/12630)
+* **reactivity:** add `__v_skip` flag to `Dep` to prevent reactive conversion ([#12804](https://github.com/vuejs/core/issues/12804)) ([e8d8f5f](https://github.com/vuejs/core/commit/e8d8f5f604e821acc46b4200d5b06979c05af1c2)), closes [#12803](https://github.com/vuejs/core/issues/12803)
+* **runtime-core:** unset old ref during patching when new ref is absent ([#12900](https://github.com/vuejs/core/issues/12900)) ([47ddf98](https://github.com/vuejs/core/commit/47ddf986021dff8de68b0da72787e53a6c19de4c)), closes [#12898](https://github.com/vuejs/core/issues/12898)
+* **slots:** make cache indexes marker non-enumerable ([#13469](https://github.com/vuejs/core/issues/13469)) ([919c447](https://github.com/vuejs/core/commit/919c44744bba1f0c661c87d2059c3b429611aa7e)), closes [#13468](https://github.com/vuejs/core/issues/13468)
+* **ssr:** handle initial selected state for select with v-model + v-for/v-if option ([#13487](https://github.com/vuejs/core/issues/13487)) ([1552095](https://github.com/vuejs/core/commit/15520954f9f1c7f834175938a50dba5d4be0e6c4)), closes [#13486](https://github.com/vuejs/core/issues/13486)
+* **types:** typo of `vOnce` and `vSlot` ([#13343](https://github.com/vuejs/core/issues/13343)) ([762fae4](https://github.com/vuejs/core/commit/762fae4b57ad60602e5c84465a3bff562785b314))
+
+
+
 ## [3.5.16](https://github.com/vuejs/core/compare/v3.5.15...v3.5.16) (2025-05-29)
 
 
@@ -232,7 +329,7 @@
 
 * **compiler-core:** fix handling of delimiterOpen in VPre ([#11915](https://github.com/vuejs/core/issues/11915)) ([706d4ac](https://github.com/vuejs/core/commit/706d4ac1d0210b2d9134b3228280187fe02fc971)), closes [#11913](https://github.com/vuejs/core/issues/11913)
 * **compiler-dom:** fix stringify static edge for partially eligible chunks in cached parent ([1d99d61](https://github.com/vuejs/core/commit/1d99d61c1bd77f9ea6743f6214a82add8346a121)), closes [#11879](https://github.com/vuejs/core/issues/11879) [#11890](https://github.com/vuejs/core/issues/11890)
-* **compiler-dom:** should ignore leading newline in <textarea> per spec ([3c4bf76](https://github.com/vuejs/core/commit/3c4bf7627649ec1e3220f8c4e4163c20d2afb367))
+* **compiler-dom:** should ignore leading newline in `<textarea>` per spec ([3c4bf76](https://github.com/vuejs/core/commit/3c4bf7627649ec1e3220f8c4e4163c20d2afb367))
 * **compiler-sfc:** nested css supports atrule and comment ([#11899](https://github.com/vuejs/core/issues/11899)) ([0e7bc71](https://github.com/vuejs/core/commit/0e7bc717e6640644f062957ec5031506f0dab215)), closes [#11896](https://github.com/vuejs/core/issues/11896)
 * **custom-element:** handle nested customElement mount w/ shadowRoot false ([#11861](https://github.com/vuejs/core/issues/11861)) ([f2d8019](https://github.com/vuejs/core/commit/f2d801918841e7673ff3f048d0d895592a2f7e23)), closes [#11851](https://github.com/vuejs/core/issues/11851) [#11871](https://github.com/vuejs/core/issues/11871)
 * **hmr:** reload async child wrapped in Suspense + KeepAlive ([#11907](https://github.com/vuejs/core/issues/11907)) ([10a2c60](https://github.com/vuejs/core/commit/10a2c6053bd30d160d0214bb3566f540187e6874)), closes [#11868](https://github.com/vuejs/core/issues/11868)

package.json

@@ -1,7 +1,7 @@
 {
   "private": true,
-  "version": "3.5.16",
+  "version": "3.5.21",
-  "packageManager": "pnpm@10.11.1",
+  "packageManager": "pnpm@10.15.0",
   "type": "module",
   "scripts": {
     "dev": "node scripts/dev.js",
@@ -17,11 +17,11 @@
     "format": "prettier --write --cache .",
     "format-check": "prettier --check --cache .",
     "test": "vitest",
-    "test-unit": "vitest --project unit",
+    "test-unit": "vitest --project unit*",
     "test-e2e": "node scripts/build.js vue -f global -d && vitest --project e2e",
     "test-dts": "run-s build-dts test-dts-only",
     "test-dts-only": "tsc -p packages-private/dts-built-test/tsconfig.json && tsc -p ./packages-private/dts-test/tsconfig.test.json",
-    "test-coverage": "vitest run --project unit --coverage",
+    "test-coverage": "vitest run --project unit* --coverage",
     "prebench": "node scripts/build.js -pf esm-browser reactivity",
     "prebench-compare": "node scripts/build.js -pf esm-browser reactivity",
     "bench": "vitest bench --project=unit --outputJson=temp/bench.json",
@@ -65,21 +65,21 @@
     "@babel/parser": "catalog:",
     "@babel/types": "catalog:",
     "@rollup/plugin-alias": "^5.1.1",
-    "@rollup/plugin-commonjs": "^28.0.3",
+    "@rollup/plugin-commonjs": "^28.0.6",
     "@rollup/plugin-json": "^6.1.0",
     "@rollup/plugin-node-resolve": "^16.0.1",
     "@rollup/plugin-replace": "5.0.4",
-    "@swc/core": "^1.11.29",
+    "@swc/core": "^1.13.5",
     "@types/hash-sum": "^1.0.2",
-    "@types/node": "^22.15.29",
+    "@types/node": "^22.17.2",
     "@types/semver": "^7.7.0",
     "@types/serve-handler": "^6.1.4",
-    "@vitest/coverage-v8": "^3.1.4",
+    "@vitest/coverage-v8": "^3.2.4",
-    "@vitest/eslint-plugin": "^1.2.1",
+    "@vitest/eslint-plugin": "^1.3.5",
     "@vue/consolidate": "1.0.0",
     "conventional-changelog-cli": "^5.0.0",
     "enquirer": "^2.4.1",
-    "esbuild": "^0.25.5",
+    "esbuild": "^0.25.9",
     "esbuild-plugin-polyfill-node": "^0.3.0",
     "eslint": "^9.27.0",
     "eslint-plugin-import-x": "^4.13.1",
@@ -87,18 +87,18 @@
     "jsdom": "^26.1.0",
     "lint-staged": "^16.0.0",
     "lodash": "^4.17.21",
-    "magic-string": "^0.30.17",
+    "magic-string": "^0.30.18",
     "markdown-table": "^3.0.4",
     "marked": "13.0.3",
-    "npm-run-all2": "^7.0.2",
+    "npm-run-all2": "^8.0.4",
     "picocolors": "^1.1.1",
     "prettier": "^3.5.3",
     "pretty-bytes": "^6.1.1",
     "pug": "^3.0.3",
-    "puppeteer": "~24.9.0",
+    "puppeteer": "~24.17.1",
     "rimraf": "^6.0.1",
-    "rollup": "^4.41.1",
+    "rollup": "^4.50.0",
-    "rollup-plugin-dts": "^6.2.1",
+    "rollup-plugin-dts": "^6.2.3",
     "rollup-plugin-esbuild": "^6.2.1",
     "rollup-plugin-polyfill-node": "^0.13.0",
     "semver": "^7.7.2",
@@ -110,6 +110,6 @@
     "typescript": "~5.6.2",
     "typescript-eslint": "^8.32.1",
     "vite": "catalog:",
-    "vitest": "^3.1.4"
+    "vitest": "^3.2.4"
   }
 }

packages-private/dts-test/scheduler.test-d.ts

@@ -0,0 +1,31 @@
+import { nextTick } from 'vue'
+import { describe, expectType } from './utils'
+
+describe('nextTick', async () => {
+  expectType<Promise<void>>(nextTick())
+  expectType<Promise<string>>(nextTick(() => 'foo'))
+  expectType<Promise<string>>(nextTick(() => Promise.resolve('foo')))
+  expectType<Promise<string>>(
+    nextTick(() => Promise.resolve(Promise.resolve('foo'))),
+  )
+
+  expectType<void>(await nextTick())
+  expectType<string>(await nextTick(() => 'foo'))
+  expectType<string>(await nextTick(() => Promise.resolve('foo')))
+  expectType<string>(
+    await nextTick(() => Promise.resolve(Promise.resolve('foo'))),
+  )
+
+  nextTick().then(value => {
+    expectType<void>(value)
+  })
+  nextTick(() => 'foo').then(value => {
+    expectType<string>(value)
+  })
+  nextTick(() => Promise.resolve('foo')).then(value => {
+    expectType<string>(value)
+  })
+  nextTick(() => Promise.resolve(Promise.resolve('foo'))).then(value => {
+    expectType<string>(value)
+  })
+})

packages-private/sfc-playground/package.json

@@ -13,7 +13,7 @@
     "vite": "catalog:"
   },
   "dependencies": {
-    "@vue/repl": "^4.5.1",
+    "@vue/repl": "^4.7.0",
     "file-saver": "^2.0.5",
     "jszip": "^3.10.1",
     "vue": "workspace:*"

packages-private/sfc-playground/src/App.vue

@@ -2,7 +2,7 @@
 import Header from './Header.vue'
 import { Repl, useStore, SFCOptions, useVueImportMap } from '@vue/repl'
 import Monaco from '@vue/repl/monaco-editor'
-import { ref, watchEffect, onMounted, computed } from 'vue'
+import { ref, watchEffect, onMounted, computed, watch } from 'vue'
 
 const replRef = ref<InstanceType<typeof Repl>>()
 
@@ -115,6 +115,34 @@ onMounted(() => {
   // @ts-expect-error process shim for old versions of @vue/compiler-sfc dependency
   window.process = { env: {} }
 })
+
+const isVaporSupported = ref(false)
+watch(
+  () => store.vueVersion,
+  (version, oldVersion) => {
+    const [major, minor] = (version || store.compiler.version)
+      .split('.')
+      .map((v: string) => parseInt(v, 10))
+    isVaporSupported.value = major > 3 || (major === 3 && minor >= 6)
+    if (oldVersion) reloadPage()
+  },
+  { immediate: true, flush: 'pre' },
+)
+
+const previewOptions = computed(() => ({
+  customCode: {
+    importCode: `import { initCustomFormatter${isVaporSupported.value ? ', vaporInteropPlugin' : ''} } from 'vue'`,
+    useCode: `
+      ${isVaporSupported.value ? 'app.use(vaporInteropPlugin)' : ''}
+      if (window.devtoolsFormatters) {
+        const index = window.devtoolsFormatters.findIndex((v) => v.__vue_custom_formatter)
+        window.devtoolsFormatters.splice(index, 1)
+        initCustomFormatter()
+      } else {
+        initCustomFormatter()
+      }`,
+  },
+}))
 </script>
 
 <template>
@@ -141,20 +169,11 @@ onMounted(() => {
     :editorOptions="{ autoSaveText: false }"
     :store="store"
     :showCompileOutput="true"
+    :showSsrOutput="useSSRMode"
+    :showOpenSourceMap="true"
     :autoResize="true"
     :clearConsole="false"
-    :preview-options="{
+    :preview-options="previewOptions"
-      customCode: {
-        importCode: `import { initCustomFormatter } from 'vue'`,
-        useCode: `if (window.devtoolsFormatters) {
-    const index = window.devtoolsFormatters.findIndex((v) => v.__vue_custom_formatter)
-    window.devtoolsFormatters.splice(index, 1)
-    initCustomFormatter()
-  } else {
-    initCustomFormatter()
-  }`,
-      },
-    }"
   />
 </template>
 

packages-private/sfc-playground/src/download/template/package.json

@@ -11,7 +11,7 @@
     "vue": "latest"
   },
   "devDependencies": {
-    "@vitejs/plugin-vue": "^5.2.4",
+    "@vitejs/plugin-vue": "^6.0.1",
-    "vite": "^6.3.5"
+    "vite": "^7.1.3"
   }
 }

packages-private/template-explorer/package.json

@@ -11,7 +11,7 @@
     "enableNonBrowserBranches": true
   },
   "dependencies": {
-    "monaco-editor": "^0.52.2",
+    "monaco-editor": "^0.53.0",
     "source-map-js": "^1.2.1"
   }
 }

packages/compiler-core/__tests__/transforms/__snapshots__/cacheStatic.spec.ts.snap

@@ -7,9 +7,9 @@ return function render(_ctx, _cache) {
   with (_ctx) {
     const { createElementVNode: _createElementVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = _Vue
 
-    return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+    return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
       _createElementVNode("div", { key: "foo" }, null, -1 /* CACHED */)
-    ])))
+    ]))]))
   }
 }"
 `;
@@ -21,7 +21,7 @@ return function render(_ctx, _cache) {
   with (_ctx) {
     const { createElementVNode: _createElementVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = _Vue
 
-    return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+    return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
       _createElementVNode("p", null, [
         _createElementVNode("span"),
         _createElementVNode("span")
@@ -30,7 +30,7 @@ return function render(_ctx, _cache) {
         _createElementVNode("span"),
         _createElementVNode("span")
       ], -1 /* CACHED */)
-    ])))
+    ]))]))
   }
 }"
 `;
@@ -42,11 +42,11 @@ return function render(_ctx, _cache) {
   with (_ctx) {
     const { createCommentVNode: _createCommentVNode, createElementVNode: _createElementVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = _Vue
 
-    return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+    return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
       _createElementVNode("div", null, [
         _createCommentVNode("comment")
       ], -1 /* CACHED */)
-    ])))
+    ]))]))
   }
 }"
 `;
@@ -58,11 +58,11 @@ return function render(_ctx, _cache) {
   with (_ctx) {
     const { createElementVNode: _createElementVNode, createTextVNode: _createTextVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = _Vue
 
-    return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+    return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
       _createElementVNode("span", null, null, -1 /* CACHED */),
-      _createTextVNode("foo"),
+      _createTextVNode("foo", -1 /* CACHED */),
       _createElementVNode("div", null, null, -1 /* CACHED */)
-    ])))
+    ]))]))
   }
 }"
 `;
@@ -74,9 +74,9 @@ return function render(_ctx, _cache) {
   with (_ctx) {
     const { createElementVNode: _createElementVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = _Vue
 
-    return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+    return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
       _createElementVNode("span", { class: "inline" }, "hello", -1 /* CACHED */)
-    ])))
+    ]))]))
   }
 }"
 `;
@@ -147,9 +147,9 @@ return function render(_ctx, _cache) {
   with (_ctx) {
     const { toDisplayString: _toDisplayString, createElementVNode: _createElementVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = _Vue
 
-    return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+    return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
       _createElementVNode("span", null, "foo " + _toDisplayString(1) + " " + _toDisplayString(true), -1 /* CACHED */)
-    ])))
+    ]))]))
   }
 }"
 `;
@@ -161,9 +161,9 @@ return function render(_ctx, _cache) {
   with (_ctx) {
     const { toDisplayString: _toDisplayString, createElementVNode: _createElementVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = _Vue
 
-    return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+    return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
       _createElementVNode("span", { foo: 0 }, _toDisplayString(1), -1 /* CACHED */)
-    ])))
+    ]))]))
   }
 }"
 `;
@@ -215,9 +215,9 @@ return function render(_ctx, _cache) {
     const _directive_foo = _resolveDirective("foo")
 
     return (_openBlock(), _createElementBlock("div", null, [
-      _withDirectives((_openBlock(), _createElementBlock("svg", null, _cache[0] || (_cache[0] = [
+      _withDirectives((_openBlock(), _createElementBlock("svg", null, [...(_cache[0] || (_cache[0] = [
         _createElementVNode("path", { d: "M2,3H5.5L12" }, null, -1 /* CACHED */)
-      ]))), [
+      ]))])), [
         [_directive_foo]
       ])
     ]))
@@ -401,9 +401,9 @@ return function render(_ctx, _cache) {
 
     return (_openBlock(), _createElementBlock("div", null, [
       ok
-        ? (_openBlock(), _createElementBlock("div", _hoisted_1, _cache[0] || (_cache[0] = [
+        ? (_openBlock(), _createElementBlock("div", _hoisted_1, [...(_cache[0] || (_cache[0] = [
             _createElementVNode("span", null, null, -1 /* CACHED */)
-          ])))
+          ]))]))
         : _createCommentVNode("v-if", true)
     ]))
   }
@@ -422,7 +422,7 @@ return function render(_ctx, _cache) {
 
     return (_openBlock(), _createElementBlock(_Fragment, null, [
       _createCommentVNode("comment"),
-      _createElementVNode("div", _hoisted_1, _cache[0] || (_cache[0] = [
+      _createElementVNode("div", _hoisted_1, [...(_cache[0] || (_cache[0] = [
         _createElementVNode("div", { id: "b" }, [
           _createElementVNode("div", { id: "c" }, [
             _createElementVNode("div", { id: "d" }, [
@@ -430,7 +430,7 @@ return function render(_ctx, _cache) {
             ])
           ])
         ], -1 /* CACHED */)
-      ]))
+      ]))])
     ], 2112 /* STABLE_FRAGMENT, DEV_ROOT_FRAGMENT */))
   }
 }"
@@ -448,9 +448,9 @@ return function render(_ctx, _cache) {
 
     return (_openBlock(), _createElementBlock("div", null, [
       (_openBlock(true), _createElementBlock(_Fragment, null, _renderList(list, (i) => {
-        return (_openBlock(), _createElementBlock("div", _hoisted_1, _cache[0] || (_cache[0] = [
+        return (_openBlock(), _createElementBlock("div", _hoisted_1, [...(_cache[0] || (_cache[0] = [
           _createElementVNode("span", null, null, -1 /* CACHED */)
-        ])))
+        ]))]))
       }), 256 /* UNKEYED_FRAGMENT */))
     ]))
   }

packages/compiler-core/__tests__/transforms/cacheStatic.spec.ts

@@ -27,7 +27,7 @@ import { PatchFlags } from '@vue/shared'
 
 const cachedChildrenArrayMatcher = (
   tags: string[],
-  needArraySpread = false,
+  needArraySpread = true,
 ) => ({
   type: NodeTypes.JS_CACHE_EXPRESSION,
   needArraySpread,
@@ -170,11 +170,6 @@ describe('compiler: cacheStatic transform', () => {
         {
           /* _ slot flag */
         },
-        {
-          type: NodeTypes.JS_PROPERTY,
-          key: { content: '__' },
-          value: { content: '[0]' },
-        },
       ],
     })
   })
@@ -202,11 +197,6 @@ describe('compiler: cacheStatic transform', () => {
         {
           /* _ slot flag */
         },
-        {
-          type: NodeTypes.JS_PROPERTY,
-          key: { content: '__' },
-          value: { content: '[0]' },
-        },
       ],
     })
   })

packages/compiler-core/__tests__/transforms/vIf.spec.ts

@@ -301,6 +301,25 @@ describe('compiler: v-if', () => {
       ])
     })
 
+    test('error on adjacent v-else', () => {
+      const onError = vi.fn()
+
+      const {
+        node: { branches },
+      } = parseWithIfTransform(
+        `<div v-if="false"/><div v-else/><div v-else/>`,
+        { onError },
+        0,
+      )
+
+      expect(onError.mock.calls[0]).toMatchObject([
+        {
+          code: ErrorCodes.X_V_ELSE_NO_ADJACENT_IF,
+          loc: branches[branches.length - 1].loc,
+        },
+      ])
+    })
+
     test('error on user key', () => {
       const onError = vi.fn()
       // dynamic

packages/compiler-core/__tests__/transforms/vSlot.spec.ts

@@ -478,7 +478,10 @@ describe('compiler: transform component slots', () => {
   })
 
   test('should only force dynamic slots when actually using scope vars w/ prefixIdentifiers: true', () => {
-    function assertDynamicSlots(template: string, shouldForce: boolean) {
+    function assertDynamicSlots(
+      template: string,
+      expectedPatchFlag?: PatchFlags,
+    ) {
       const { root } = parseWithSlots(template, { prefixIdentifiers: true })
       let flag: any
       if (root.children[0].type === NodeTypes.FOR) {
@@ -491,8 +494,8 @@ describe('compiler: transform component slots', () => {
           .children[0] as ComponentNode
         flag = (innerComp.codegenNode as VNodeCall).patchFlag
       }
-      if (shouldForce) {
+      if (expectedPatchFlag) {
-        expect(flag).toBe(PatchFlags.DYNAMIC_SLOTS)
+        expect(flag).toBe(expectedPatchFlag)
       } else {
         expect(flag).toBeUndefined()
       }
@@ -502,14 +505,13 @@ describe('compiler: transform component slots', () => {
       `<div v-for="i in list">
         <Comp v-slot="bar">foo</Comp>
       </div>`,
-      false,
     )
 
     assertDynamicSlots(
       `<div v-for="i in list">
         <Comp v-slot="bar">{{ i }}</Comp>
       </div>`,
-      true,
+      PatchFlags.DYNAMIC_SLOTS,
     )
 
     // reference the component's own slot variable should not force dynamic slots
@@ -517,14 +519,13 @@ describe('compiler: transform component slots', () => {
       `<Comp v-slot="foo">
         <Comp v-slot="bar">{{ bar }}</Comp>
       </Comp>`,
-      false,
     )
 
     assertDynamicSlots(
       `<Comp v-slot="foo">
         <Comp v-slot="bar">{{ foo }}</Comp>
       </Comp>`,
-      true,
+      PatchFlags.DYNAMIC_SLOTS,
     )
 
     // #2564
@@ -532,14 +533,35 @@ describe('compiler: transform component slots', () => {
       `<div v-for="i in list">
         <Comp v-slot="bar"><button @click="fn(i)" /></Comp>
       </div>`,
-      true,
+      PatchFlags.DYNAMIC_SLOTS,
     )
 
     assertDynamicSlots(
       `<div v-for="i in list">
         <Comp v-slot="bar"><button @click="fn()" /></Comp>
       </div>`,
-      false,
+    )
+
+    // #9380
+    assertDynamicSlots(
+      `<div v-for="i in list">
+        <Comp :i="i">foo</Comp>
+      </div>`,
+      PatchFlags.PROPS,
+    )
+
+    assertDynamicSlots(
+      `<div v-for="i in list">
+        <Comp v-slot="{ value = i }"><button @click="fn()" /></Comp>
+      </div>`,
+      PatchFlags.DYNAMIC_SLOTS,
+    )
+
+    assertDynamicSlots(
+      `<div v-for="i in list">
+        <Comp v-slot:[i]><button @click="fn()" /></Comp>
+      </div>`,
+      PatchFlags.DYNAMIC_SLOTS,
     )
   })
 

packages/compiler-core/__tests__/utils.spec.ts

@@ -1,4 +1,9 @@
-import type { ExpressionNode, TransformContext } from '../src'
+import { babelParse, walkIdentifiers } from '@vue/compiler-sfc'
+import {
+  type ExpressionNode,
+  type TransformContext,
+  isReferencedIdentifier,
+} from '../src'
 import { type Position, createSimpleExpression } from '../src/ast'
 import {
   advancePositionWithClone,
@@ -115,3 +120,18 @@ test('toValidAssetId', () => {
     '_component_test_2797935797_1',
   )
 })
+
+describe('isReferencedIdentifier', () => {
+  test('identifiers in function parameters should not be inferred as references', () => {
+    expect.assertions(4)
+    const ast = babelParse(`(({ title }) => [])`)
+    walkIdentifiers(
+      ast.program.body[0],
+      (node, parent, parentStack, isReference) => {
+        expect(isReference).toBe(false)
+        expect(isReferencedIdentifier(node, parent, parentStack)).toBe(false)
+      },
+      true,
+    )
+  })
+})

packages/compiler-core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/compiler-core",
-  "version": "3.5.16",
+  "version": "3.5.21",
   "description": "@vue/compiler-core",
   "main": "index.js",
   "module": "dist/compiler-core.esm-bundler.js",

packages/compiler-core/src/babelUtils.ts

@@ -122,7 +122,7 @@ export function isReferencedIdentifier(
     return false
   }
 
-  if (isReferenced(id, parent)) {
+  if (isReferenced(id, parent, parentStack[parentStack.length - 2])) {
     return true
   }
 
@@ -132,7 +132,8 @@ export function isReferencedIdentifier(
     case 'AssignmentExpression':
     case 'AssignmentPattern':
       return true
-    case 'ObjectPattern':
+    case 'ObjectProperty':
+      return parent.key !== id && isInDestructureAssignment(parent, parentStack)
     case 'ArrayPattern':
       return isInDestructureAssignment(parent, parentStack)
   }

packages/compiler-core/src/parser.ts

@@ -43,6 +43,7 @@ import {
   isCoreComponent,
   isSimpleIdentifier,
   isStaticArgOf,
+  isVPre,
 } from './utils'
 import { decodeHTML } from 'entities/lib/decode.js'
 import {
@@ -246,7 +247,7 @@ const tokenizer = new Tokenizer(stack, {
   ondirarg(start, end) {
     if (start === end) return
     const arg = getSlice(start, end)
-    if (inVPre) {
+    if (inVPre && !isVPre(currentProp!)) {
       ;(currentProp as AttributeNode).name += arg
       setLocEnd((currentProp as AttributeNode).nameLoc, end)
     } else {
@@ -262,7 +263,7 @@ const tokenizer = new Tokenizer(stack, {
 
   ondirmodifier(start, end) {
     const mod = getSlice(start, end)
-    if (inVPre) {
+    if (inVPre && !isVPre(currentProp!)) {
       ;(currentProp as AttributeNode).name += '.' + mod
       setLocEnd((currentProp as AttributeNode).nameLoc, end)
     } else if ((currentProp as DirectiveNode).name === 'slot') {

packages/compiler-core/src/transforms/cacheStatic.ts

@@ -12,19 +12,22 @@ import {
   type RootNode,
   type SimpleExpressionNode,
   type SlotFunctionExpression,
-  type SlotsObjectProperty,
   type TemplateChildNode,
   type TemplateNode,
   type TextCallNode,
   type VNodeCall,
   createArrayExpression,
-  createObjectProperty,
-  createSimpleExpression,
   getVNodeBlockHelper,
   getVNodeHelper,
 } from '../ast'
 import type { TransformContext } from '../transform'
-import { PatchFlags, isArray, isString, isSymbol } from '@vue/shared'
+import {
+  PatchFlagNames,
+  PatchFlags,
+  isArray,
+  isString,
+  isSymbol,
+} from '@vue/shared'
 import { findDir, isSlotOutlet } from '../utils'
 import {
   GUARD_REACTIVE_PROPS,
@@ -109,6 +112,15 @@ function walk(
         ? ConstantTypes.NOT_CONSTANT
         : getConstantType(child, context)
       if (constantType >= ConstantTypes.CAN_CACHE) {
+        if (
+          child.codegenNode.type === NodeTypes.JS_CALL_EXPRESSION &&
+          child.codegenNode.arguments.length > 0
+        ) {
+          child.codegenNode.arguments.push(
+            PatchFlags.CACHED +
+              (__DEV__ ? ` /* ${PatchFlagNames[PatchFlags.CACHED]} */` : ``),
+          )
+        }
         toCache.push(child)
         continue
       }
@@ -142,7 +154,6 @@ function walk(
   }
 
   let cachedAsArray = false
-  const slotCacheKeys = []
   if (toCache.length === children.length && node.type === NodeTypes.ELEMENT) {
     if (
       node.tagType === ElementTypes.ELEMENT &&
@@ -166,7 +177,6 @@ function walk(
       // default slot
       const slot = getSlotNode(node.codegenNode, 'default')
       if (slot) {
-        slotCacheKeys.push(context.cached.length)
         slot.returns = getCacheExpression(
           createArrayExpression(slot.returns as TemplateChildNode[]),
         )
@@ -190,7 +200,6 @@ function walk(
         slotName.arg &&
         getSlotNode(parent.codegenNode, slotName.arg)
       if (slot) {
-        slotCacheKeys.push(context.cached.length)
         slot.returns = getCacheExpression(
           createArrayExpression(slot.returns as TemplateChildNode[]),
         )
@@ -201,39 +210,22 @@ function walk(
 
   if (!cachedAsArray) {
     for (const child of toCache) {
-      slotCacheKeys.push(context.cached.length)
       child.codegenNode = context.cache(child.codegenNode!)
     }
   }
 
-  // put the slot cached keys on the slot object, so that the cache
-  // can be removed when component unmounting to prevent memory leaks
-  if (
-    slotCacheKeys.length &&
-    node.type === NodeTypes.ELEMENT &&
-    node.tagType === ElementTypes.COMPONENT &&
-    node.codegenNode &&
-    node.codegenNode.type === NodeTypes.VNODE_CALL &&
-    node.codegenNode.children &&
-    !isArray(node.codegenNode.children) &&
-    node.codegenNode.children.type === NodeTypes.JS_OBJECT_EXPRESSION
-  ) {
-    node.codegenNode.children.properties.push(
-      createObjectProperty(
-        `__`,
-        createSimpleExpression(JSON.stringify(slotCacheKeys), false),
-      ) as SlotsObjectProperty,
-    )
-  }
-
   function getCacheExpression(value: JSChildNode): CacheExpression {
     const exp = context.cache(value)
     // #6978, #7138, #7114
     // a cached children array inside v-for can caused HMR errors since
     // it might be mutated when mounting the first item
-    if (inFor && context.hmr) {
+    // #13221
-      exp.needArraySpread = true
+    // fix memory leak in cached array:
-    }
+    // cached vnodes get replaced by cloned ones during mountChildren,
+    // which bind DOM elements. These DOM references persist after unmount,
+    // preventing garbage collection. Array spread avoids mutating cached
+    // array, preventing memory leaks.
+    exp.needArraySpread = true
     return exp
   }
 

packages/compiler-core/src/transforms/vBind.ts

@@ -65,7 +65,7 @@ export const transformBind: DirectiveTransform = (dir, _node, context) => {
     arg.children.unshift(`(`)
     arg.children.push(`) || ""`)
   } else if (!arg.isStatic) {
-    arg.content = `${arg.content} || ""`
+    arg.content = arg.content ? `${arg.content} || ""` : `""`
   }
 
   // .sync is replaced by v-model:arg

packages/compiler-core/src/transforms/vIf.ts

@@ -36,7 +36,7 @@ import { findDir, findProp, getMemoedVNodeCall, injectProp } from '../utils'
 import { PatchFlags } from '@vue/shared'
 
 export const transformIf: NodeTransform = createStructuralDirectiveTransform(
-  /^(if|else|else-if)$/,
+  /^(?:if|else|else-if)$/,
   (node, dir, context) => {
     return processIf(node, dir, context, (ifNode, branch, isRoot) => {
       // #1587: We need to dynamically increment the key based on the current
@@ -141,9 +141,9 @@ export function processIf(
       }
 
       if (sibling && sibling.type === NodeTypes.IF) {
-        // Check if v-else was followed by v-else-if
+        // Check if v-else was followed by v-else-if or there are two adjacent v-else
         if (
-          dir.name === 'else-if' &&
+          (dir.name === 'else-if' || dir.name === 'else') &&
           sibling.branches[sibling.branches.length - 1].condition === undefined
         ) {
           context.onError(

packages/compiler-core/src/transforms/vMemo.ts

@@ -16,7 +16,7 @@ const seen = new WeakSet()
 export const transformMemo: NodeTransform = (node, context) => {
   if (node.type === NodeTypes.ELEMENT) {
     const dir = findDir(node, 'memo')
-    if (!dir || seen.has(node)) {
+    if (!dir || seen.has(node) || context.inSSR) {
       return
     }
     seen.add(node)

packages/compiler-core/src/transforms/vSlot.ts

@@ -131,9 +131,17 @@ export function buildSlots(
   // since it likely uses a scope variable.
   let hasDynamicSlots = context.scopes.vSlot > 0 || context.scopes.vFor > 0
   // with `prefixIdentifiers: true`, this can be further optimized to make
-  // it dynamic only when the slot actually uses the scope variables.
+  // it dynamic when
+  // 1. the slot arg or exp uses the scope variables.
+  // 2. the slot children use the scope variables.
   if (!__BROWSER__ && !context.ssr && context.prefixIdentifiers) {
-    hasDynamicSlots = hasScopeRef(node, context.identifiers)
+    hasDynamicSlots =
+      node.props.some(
+        prop =>
+          isVSlot(prop) &&
+          (hasScopeRef(prop.arg, context.identifiers) ||
+            hasScopeRef(prop.exp, context.identifiers)),
+      ) || children.some(child => hasScopeRef(child, context.identifiers))
   }
 
   // 1. Check for slot with slotProps on component itself.
@@ -215,7 +223,7 @@ export function buildSlots(
         ),
       )
     } else if (
-      (vElse = findDir(slotElement, /^else(-if)?$/, true /* allowEmpty */))
+      (vElse = findDir(slotElement, /^else(?:-if)?$/, true /* allowEmpty */))
     ) {
       // find adjacent v-if
       let j = i
@@ -226,7 +234,7 @@ export function buildSlots(
           break
         }
       }
-      if (prev && isTemplateNode(prev) && findDir(prev, /^(else-)?if$/)) {
+      if (prev && isTemplateNode(prev) && findDir(prev, /^(?:else-)?if$/)) {
         __TEST__ && assert(dynamicSlots.length > 0)
         // attach this slot to previous conditional
         let conditional = dynamicSlots[

packages/compiler-core/src/utils.ts

@@ -63,7 +63,7 @@ export function isCoreComponent(tag: string): symbol | void {
   }
 }
 
-const nonIdentifierRE = /^\d|[^\$\w\xA0-\uFFFF]/
+const nonIdentifierRE = /^$|^\d|[^\$\w\xA0-\uFFFF]/
 export const isSimpleIdentifier = (name: string): boolean =>
   !nonIdentifierRE.test(name)
 
@@ -189,7 +189,7 @@ export const isMemberExpression: (
 ) => boolean = __BROWSER__ ? isMemberExpressionBrowser : isMemberExpressionNode
 
 const fnExpRE =
-  /^\s*(async\s*)?(\([^)]*?\)|[\w$_]+)\s*(:[^=]+)?=>|^\s*(async\s+)?function(?:\s+[\w$]+)?\s*\(/
+  /^\s*(?:async\s*)?(?:\([^)]*?\)|[\w$_]+)\s*(?::[^=]+)?=>|^\s*(?:async\s+)?function(?:\s+[\w$]+)?\s*\(/
 
 export const isFnExpressionBrowser: (exp: ExpressionNode) => boolean = exp =>
   fnExpRE.test(getExpSource(exp))
@@ -343,6 +343,10 @@ export function isText(
   return node.type === NodeTypes.INTERPOLATION || node.type === NodeTypes.TEXT
 }
 
+export function isVPre(p: ElementNode['props'][0]): p is DirectiveNode {
+  return p.type === NodeTypes.DIRECTIVE && p.name === 'pre'
+}
+
 export function isVSlot(p: ElementNode['props'][0]): p is DirectiveNode {
   return p.type === NodeTypes.DIRECTIVE && p.name === 'slot'
 }

packages/compiler-dom/__tests__/transforms/__snapshots__/stringifyStatic.spec.ts.snap

@@ -4,11 +4,11 @@ exports[`stringify static html > eligible content (elements > 20) + non-eligible
 "const { createElementVNode: _createElementVNode, createStaticVNode: _createStaticVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span>", 20),
     _createElementVNode("div", { key: "1" }, "1", -1 /* CACHED */),
     _createStaticVNode("<span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span>", 20)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -16,9 +16,9 @@ exports[`stringify static html > escape 1`] = `
 "const { toDisplayString: _toDisplayString, normalizeClass: _normalizeClass, createElementVNode: _createElementVNode, createStaticVNode: _createStaticVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<div><span class=\\"foo&gt;ar\\">1 + &lt;</span><span>&amp;</span><span class=\\"foo&gt;ar\\">1 + &lt;</span><span>&amp;</span><span class=\\"foo&gt;ar\\">1 + &lt;</span><span>&amp;</span><span class=\\"foo&gt;ar\\">1 + &lt;</span><span>&amp;</span><span class=\\"foo&gt;ar\\">1 + &lt;</span><span>&amp;</span></div>", 1)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -26,9 +26,9 @@ exports[`stringify static html > serializing constant bindings 1`] = `
 "const { toDisplayString: _toDisplayString, normalizeClass: _normalizeClass, createElementVNode: _createElementVNode, createStaticVNode: _createStaticVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<div style=\\"color:red;\\"><span class=\\"foo bar\\">1 + false</span><span class=\\"foo bar\\">1 + false</span><span class=\\"foo bar\\">1 + false</span><span class=\\"foo bar\\">1 + false</span><span class=\\"foo bar\\">1 + false</span></div>", 1)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -36,9 +36,9 @@ exports[`stringify static html > serializing template string style 1`] = `
 "const { toDisplayString: _toDisplayString, normalizeClass: _normalizeClass, createElementVNode: _createElementVNode, createStaticVNode: _createStaticVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<div style=\\"color:red;\\"><span class=\\"foo bar\\">1 + false</span><span class=\\"foo bar\\">1 + false</span><span class=\\"foo bar\\">1 + false</span><span class=\\"foo bar\\">1 + false</span><span class=\\"foo bar\\">1 + false</span></div>", 1)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -46,7 +46,7 @@ exports[`stringify static html > should bail for <option> elements with null val
 "const { createElementVNode: _createElementVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createElementVNode("select", null, [
       _createElementVNode("option", { value: null }),
       _createElementVNode("option", { value: "1" }),
@@ -55,7 +55,7 @@ return function render(_ctx, _cache) {
       _createElementVNode("option", { value: "1" }),
       _createElementVNode("option", { value: "1" })
     ], -1 /* CACHED */)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -63,7 +63,7 @@ exports[`stringify static html > should bail for <option> elements with number v
 "const { createElementVNode: _createElementVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createElementVNode("select", null, [
       _createElementVNode("option", { value: 1 }),
       _createElementVNode("option", { value: 1 }),
@@ -71,7 +71,7 @@ return function render(_ctx, _cache) {
       _createElementVNode("option", { value: 1 }),
       _createElementVNode("option", { value: 1 })
     ], -1 /* CACHED */)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -95,7 +95,7 @@ exports[`stringify static html > should bail on bindings that are cached but not
 "const { createElementVNode: _createElementVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createElementVNode("div", null, [
       _createElementVNode("span", { class: "foo" }, "foo"),
       _createElementVNode("span", { class: "foo" }, "foo"),
@@ -104,7 +104,7 @@ return function render(_ctx, _cache) {
       _createElementVNode("span", { class: "foo" }, "foo"),
       _createElementVNode("img", { src: _imports_0_ })
     ], -1 /* CACHED */)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -112,9 +112,9 @@ exports[`stringify static html > should work for <option> elements with string v
 "const { createElementVNode: _createElementVNode, createStaticVNode: _createStaticVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<select><option value=\\"1\\"></option><option value=\\"1\\"></option><option value=\\"1\\"></option><option value=\\"1\\"></option><option value=\\"1\\"></option></select>", 1)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -122,9 +122,9 @@ exports[`stringify static html > should work for multiple adjacent nodes 1`] = `
 "const { createElementVNode: _createElementVNode, createStaticVNode: _createStaticVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<span class=\\"foo\\"></span><span class=\\"foo\\"></span><span class=\\"foo\\"></span><span class=\\"foo\\"></span><span class=\\"foo\\"></span>", 5)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -132,9 +132,9 @@ exports[`stringify static html > should work on eligible content (elements > 20)
 "const { createElementVNode: _createElementVNode, createStaticVNode: _createStaticVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<div><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></div>", 1)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -142,9 +142,9 @@ exports[`stringify static html > should work on eligible content (elements with
 "const { createElementVNode: _createElementVNode, createStaticVNode: _createStaticVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<div><span class=\\"foo\\"></span><span class=\\"foo\\"></span><span class=\\"foo\\"></span><span class=\\"foo\\"></span><span class=\\"foo\\"></span></div>", 1)
-  ])))
+  ]))]))
 }"
 `;
 
@@ -152,9 +152,9 @@ exports[`stringify static html > should work with bindings that are non-static b
 "const { createElementVNode: _createElementVNode, createStaticVNode: _createStaticVNode, openBlock: _openBlock, createElementBlock: _createElementBlock } = Vue
 
 return function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<div><span class=\\"foo\\">foo</span><span class=\\"foo\\">foo</span><span class=\\"foo\\">foo</span><span class=\\"foo\\">foo</span><span class=\\"foo\\">foo</span><img src=\\"" + _imports_0_ + "\\"></div>", 1)
-  ])))
+  ]))]))
 }"
 `;
 

packages/compiler-dom/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/compiler-dom",
-  "version": "3.5.16",
+  "version": "3.5.21",
   "description": "@vue/compiler-dom",
   "main": "index.js",
   "module": "dist/compiler-dom.esm-bundler.js",

packages/compiler-dom/src/errors.ts

@@ -42,7 +42,7 @@ if (__TEST__) {
   if (DOMErrorCodes.X_V_HTML_NO_EXPRESSION < ErrorCodes.__EXTEND_POINT__) {
     throw new Error(
       `DOMErrorCodes need to be updated to ${
-        ErrorCodes.__EXTEND_POINT__ + 1
+        ErrorCodes.__EXTEND_POINT__
       } to match extension point from core ErrorCodes.`,
     )
   }

packages/compiler-dom/src/transforms/stringifyStatic.ts

@@ -184,7 +184,7 @@ const getCachedNode = (
   }
 }
 
-const dataAriaRE = /^(data|aria)-/
+const dataAriaRE = /^(?:data|aria)-/
 const isStringifiableAttr = (name: string, ns: Namespaces) => {
   return (
     (ns === Namespaces.HTML

packages/compiler-sfc/__tests__/__snapshots__/compileScript.spec.ts.snap

@@ -884,9 +884,9 @@ export default {
         
 return (_ctx, _push, _parent, _attrs) => {
   const _cssVars = { style: {
-  "--xxxxxxxx-count": (count.value),
+  ":--xxxxxxxx-count": (count.value),
-  "--xxxxxxxx-style\\\\.color": (style.color),
+  ":--xxxxxxxx-style\\\\.color": (style.color),
-  "--xxxxxxxx-height\\\\ \\\\+\\\\ \\\\\\"px\\\\\\"": (height.value + "px")
+  ":--xxxxxxxx-height\\\\ \\\\+\\\\ \\\\\\"px\\\\\\"": (height.value + "px")
 }}
   _push(\`<!--[--><div\${
     _ssrRenderAttrs(_cssVars)

packages/compiler-sfc/__tests__/__snapshots__/templateTransformAssetUrl.spec.ts.snap

@@ -81,9 +81,9 @@ import _imports_1 from '/bar.png'
 
 
 export function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<img src=\\"" + _imports_0 + "\\"><img src=\\"" + _imports_1 + "\\"><img src=\\"https://foo.bar/baz.png\\"><img src=\\"//foo.bar/baz.png\\"><img src=\\"" + _imports_0 + "\\">", 5)
-  ])))
+  ]))]))
 }"
 `;
 

packages/compiler-sfc/__tests__/__snapshots__/templateTransformSrcset.spec.ts.snap

@@ -33,6 +33,16 @@ export function render(_ctx, _cache) {
 }"
 `;
 
+exports[`compiler sfc: transform srcset > transform empty srcset w/ includeAbsolute: true 1`] = `
+"import { openBlock as _openBlock, createElementBlock as _createElementBlock } from "vue"
+
+const _hoisted_1 = { srcset: " " }
+
+export function render(_ctx, _cache) {
+  return (_openBlock(), _createElementBlock("img", _hoisted_1))
+}"
+`;
+
 exports[`compiler sfc: transform srcset > transform srcset 1`] = `
 "import { createElementVNode as _createElementVNode, Fragment as _Fragment, openBlock as _openBlock, createElementBlock as _createElementBlock } from "vue"
 import _imports_0 from './logo.png'
@@ -245,8 +255,8 @@ const _hoisted_8 = _imports_1 + ', ' + _imports_1 + ' 2x'
 const _hoisted_9 = _imports_1 + ', ' + _imports_0 + ' 2x'
 
 export function render(_ctx, _cache) {
-  return (_openBlock(), _createElementBlock("div", null, _cache[0] || (_cache[0] = [
+  return (_openBlock(), _createElementBlock("div", null, [...(_cache[0] || (_cache[0] = [
     _createStaticVNode("<img src=\\"./logo.png\\" srcset=\\"\\"><img src=\\"./logo.png\\" srcset=\\"" + _hoisted_1 + "\\"><img src=\\"./logo.png\\" srcset=\\"" + _hoisted_2 + "\\"><img src=\\"./logo.png\\" srcset=\\"" + _hoisted_3 + "\\"><img src=\\"./logo.png\\" srcset=\\"" + _hoisted_4 + "\\"><img src=\\"./logo.png\\" srcset=\\"" + _hoisted_5 + "\\"><img src=\\"./logo.png\\" srcset=\\"" + _hoisted_6 + "\\"><img src=\\"./logo.png\\" srcset=\\"" + _hoisted_7 + "\\"><img src=\\"/logo.png\\" srcset=\\"" + _hoisted_8 + "\\"><img src=\\"https://example.com/logo.png\\" srcset=\\"https://example.com/logo.png, https://example.com/logo.png 2x\\"><img src=\\"/logo.png\\" srcset=\\"" + _hoisted_9 + "\\"><img src=\\"data:image/png;base64,i\\" srcset=\\"data:image/png;base64,i 1x, data:image/png;base64,i 2x\\">", 12)
-  ])))
+  ]))]))
 }"
 `;

packages/compiler-sfc/__tests__/compileScript.spec.ts

@@ -652,10 +652,10 @@ describe('SFC compile <script setup>', () => {
       expect(content).toMatch(`return (_ctx, _push`)
       expect(content).toMatch(`ssrInterpolate`)
       expect(content).not.toMatch(`useCssVars`)
-      expect(content).toMatch(`"--${mockId}-count": (count.value)`)
+      expect(content).toMatch(`":--${mockId}-count": (count.value)`)
-      expect(content).toMatch(`"--${mockId}-style\\\\.color": (style.color)`)
+      expect(content).toMatch(`":--${mockId}-style\\\\.color": (style.color)`)
       expect(content).toMatch(
-        `"--${mockId}-height\\\\ \\\\+\\\\ \\\\\\"px\\\\\\"": (height.value + "px")`,
+        `":--${mockId}-height\\\\ \\\\+\\\\ \\\\\\"px\\\\\\"": (height.value + "px")`,
       )
       assertCode(content)
     })
@@ -913,6 +913,13 @@ describe('SFC compile <script setup>', () => {
       expect(() =>
         compile(`<script>foo()</script><script setup lang="ts">bar()</script>`),
       ).toThrow(`<script> and <script setup> must have the same language type`)
+
+      // #13193 must check lang before parsing with babel
+      expect(() =>
+        compile(
+          `<script lang="ts">const a = 1</script><script setup lang="tsx">const Comp = () => <p>test</p></script>`,
+        ),
+      ).toThrow(`<script> and <script setup> must have the same language type`)
     })
 
     const moduleErrorMsg = `cannot contain ES module exports`
@@ -1543,4 +1550,19 @@ describe('compileScript', () => {
     )
     assertCode(content)
   })
+
+  test('should not compile unrecognized language', () => {
+    const { content, lang, scriptAst } = compile(
+      `<script lang="coffee">
+      export default
+        data: ->
+          myVal: 0
+      </script>`,
+    )
+    expect(content).toMatch(`export default
+        data: ->
+          myVal: 0`)
+    expect(lang).toBe('coffee')
+    expect(scriptAst).not.toBeDefined()
+  })
 })

packages/compiler-sfc/__tests__/compileScript/__snapshots__/defineProps.spec.ts.snap

@@ -148,27 +148,6 @@ export default /*@__PURE__*/_defineComponent({
 
       
     
-return {  }
-}
-
-})"
-`;
-
-exports[`defineProps > w/ TSTypeAliasDeclaration 1`] = `
-"import { defineComponent as _defineComponent } from 'vue'
-type FunFoo<O> = (item: O) => boolean;
-    type FunBar = FunFoo<number>;
-    
-export default /*@__PURE__*/_defineComponent({
-  props: {
-    foo: { type: Function, required: false, default: () => true },
-    bar: { type: Function, required: false, default: () => true }
-  },
-  setup(__props: any, { expose: __expose }) {
-  __expose();
-
-    
-    
 return {  }
 }
 

packages/compiler-sfc/__tests__/compileScript/defineProps.spec.ts

@@ -808,30 +808,4 @@ const props = defineProps({ foo: String })
     expect(content).toMatch(`foo: { default: 5.5, type: Number }`)
     assertCode(content)
   })
-
-  test('w/ TSTypeAliasDeclaration', () => {
-    const { content } = compile(`
-    <script setup lang="ts">
-    type FunFoo<O> = (item: O) => boolean;
-    type FunBar = FunFoo<number>;
-    withDefaults(
-      defineProps<{
-        foo?: FunFoo<number>;
-        bar?: FunBar;
-      }>(),
-      {
-        foo: () => true,
-        bar: () => true,
-      },
-    );
-    </script>
-      `)
-    assertCode(content)
-    expect(content).toMatch(
-      `foo: { type: Function, required: false, default: () => true }`,
-    )
-    expect(content).toMatch(
-      `bar: { type: Function, required: false, default: () => true }`,
-    )
-  })
 })

packages/compiler-sfc/__tests__/compileScript/resolveType.spec.ts

@@ -538,7 +538,7 @@ describe('resolveType', () => {
 
     expect(props).toStrictEqual({
       foo: ['Symbol', 'String', 'Number'],
-      bar: [UNKNOWN_TYPE],
+      bar: ['String', 'Number'],
     })
   })
 
@@ -731,6 +731,49 @@ describe('resolveType', () => {
     })
   })
 
+  describe('type alias declaration', () => {
+    // #13240
+    test('function type', () => {
+      expect(
+        resolve(`
+      type FunFoo<O> = (item: O) => boolean;
+      type FunBar = FunFoo<number>;
+      defineProps<{
+        foo?: FunFoo<number>;
+        bar?: FunBar;
+      }>()
+      `).props,
+      ).toStrictEqual({
+        foo: ['Function'],
+        bar: ['Function'],
+      })
+    })
+
+    test('with intersection type', () => {
+      expect(
+        resolve(`
+      type Brand<T> = T & {};
+      defineProps<{
+        foo: Brand<string>;
+      }>()
+      `).props,
+      ).toStrictEqual({
+        foo: ['String', 'Object'],
+      })
+    })
+
+    test('with union type', () => {
+      expect(
+        resolve(`
+        type Wrapped<T> = T | symbol | number
+        defineProps<{foo?: Wrapped<boolean>}>()
+      `).props,
+      ).toStrictEqual({
+        foo: ['Boolean', 'Symbol', 'Number'],
+      })
+    })
+  })
+
   describe('generics', () => {
     test('generic with type literal', () => {
       expect(
@@ -1155,6 +1198,45 @@ describe('resolveType', () => {
       expect(deps && [...deps]).toStrictEqual(['/user.ts'])
     })
 
+    // #13484
+    test('ts module resolve w/ project reference & extends & ${configDir}', () => {
+      const files = {
+        '/tsconfig.json': JSON.stringify({
+          files: [],
+          references: [{ path: './tsconfig.app.json' }],
+        }),
+        '/tsconfig.app.json': JSON.stringify({
+          extends: ['./tsconfigs/base.json'],
+        }),
+        '/tsconfigs/base.json': JSON.stringify({
+          compilerOptions: {
+            paths: {
+              '@/*': ['${configDir}/src/*'],
+            },
+          },
+          include: ['${configDir}/src/**/*.ts', '${configDir}/src/**/*.vue'],
+        }),
+        '/src/types.ts':
+          'export type BaseProps = { foo?: string, bar?: string }',
+      }
+
+      const { props, deps } = resolve(
+        `
+        import { BaseProps } from '@/types.ts';
+        defineProps<BaseProps>()
+        `,
+        files,
+        {},
+        '/src/components/Foo.vue',
+      )
+
+      expect(props).toStrictEqual({
+        foo: ['String'],
+        bar: ['String'],
+      })
+      expect(deps && [...deps]).toStrictEqual(['/src/types.ts'])
+    })
+
     test('ts module resolve w/ project reference folder', () => {
       const files = {
         '/tsconfig.json': JSON.stringify({
@@ -1299,6 +1381,33 @@ describe('resolveType', () => {
       expect(deps && [...deps]).toStrictEqual(Object.keys(files))
     })
 
+    test('global types with named exports', () => {
+      const files = {
+        '/global.d.ts': `
+          declare global {
+            export interface ExportedInterface { foo: number }
+            export type ExportedType = { bar: boolean }
+          }
+          export {}
+        `,
+      }
+
+      const globalTypeFiles = { globalTypeFiles: Object.keys(files) }
+
+      expect(
+        resolve(`defineProps<ExportedInterface>()`, files, globalTypeFiles)
+          .props,
+      ).toStrictEqual({
+        foo: ['Number'],
+      })
+
+      expect(
+        resolve(`defineProps<ExportedType>()`, files, globalTypeFiles).props,
+      ).toStrictEqual({
+        bar: ['Boolean'],
+      })
+    })
+
     test('global types with ambient references', () => {
       const files = {
         // with references

packages/compiler-sfc/__tests__/templateTransformSrcset.spec.ts

@@ -72,6 +72,14 @@ describe('compiler sfc: transform srcset', () => {
     ).toMatchSnapshot()
   })
 
+  test('transform empty srcset w/ includeAbsolute: true', () => {
+    expect(
+      compileWithSrcset(`<img srcset=" " />`, {
+        includeAbsolute: true,
+      }).code,
+    ).toMatchSnapshot()
+  })
+
   test('transform srcset w/ stringify', () => {
     const code = compileWithSrcset(
       `<div>${src}</div>`,

packages/compiler-sfc/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/compiler-sfc",
-  "version": "3.5.16",
+  "version": "3.5.21",
   "description": "@vue/compiler-sfc",
   "main": "dist/compiler-sfc.cjs.js",
   "module": "dist/compiler-sfc.esm-browser.js",
@@ -49,7 +49,7 @@
     "@vue/shared": "workspace:*",
     "estree-walker": "catalog:",
     "magic-string": "catalog:",
-    "postcss": "^8.5.3",
+    "postcss": "^8.5.6",
     "source-map-js": "catalog:"
   },
   "devDependencies": {
@@ -58,10 +58,10 @@
     "hash-sum": "^2.0.0",
     "lru-cache": "10.1.0",
     "merge-source-map": "^1.1.0",
-    "minimatch": "~10.0.1",
+    "minimatch": "~10.0.3",
     "postcss-modules": "^6.0.1",
     "postcss-selector-parser": "^7.1.0",
     "pug": "^3.0.3",
-    "sass": "^1.89.1"
+    "sass": "^1.90.0"
   }
 }

packages/compiler-sfc/src/compileScript.ts

@@ -18,6 +18,7 @@ import type {
   Declaration,
   ExportSpecifier,
   Identifier,
+  LVal,
   Node,
   ObjectPattern,
   Statement,
@@ -55,7 +56,13 @@ import { DEFINE_EXPOSE, processDefineExpose } from './script/defineExpose'
 import { DEFINE_OPTIONS, processDefineOptions } from './script/defineOptions'
 import { DEFINE_SLOTS, processDefineSlots } from './script/defineSlots'
 import { DEFINE_MODEL, processDefineModel } from './script/defineModel'
-import { getImportedName, isCallOf, isLiteralNode } from './script/utils'
+import {
+  getImportedName,
+  isCallOf,
+  isJS,
+  isLiteralNode,
+  isTS,
+} from './script/utils'
 import { analyzeScriptBindings } from './script/analyzeScriptBindings'
 import { isImportUsed } from './script/importUsageCheck'
 import { processAwait } from './script/topLevelAwait'
@@ -167,33 +174,43 @@ export function compileScript(
     )
   }
 
-  const ctx = new ScriptCompileContext(sfc, options)
   const { script, scriptSetup, source, filename } = sfc
   const hoistStatic = options.hoistStatic !== false && !script
   const scopeId = options.id ? options.id.replace(/^data-v-/, '') : ''
   const scriptLang = script && script.lang
   const scriptSetupLang = scriptSetup && scriptSetup.lang
+  const isJSOrTS =
+    isJS(scriptLang, scriptSetupLang) || isTS(scriptLang, scriptSetupLang)
 
-  if (!scriptSetup) {
+  if (script && scriptSetup && scriptLang !== scriptSetupLang) {
-    if (!script) {
-      throw new Error(`[@vue/compiler-sfc] SFC contains no <script> tags.`)
-    }
-    // normal <script> only
-    return processNormalScript(ctx, scopeId)
-  }
-
-  if (script && scriptLang !== scriptSetupLang) {
     throw new Error(
       `[@vue/compiler-sfc] <script> and <script setup> must have the same ` +
         `language type.`,
     )
   }
 
-  if (scriptSetupLang && !ctx.isJS && !ctx.isTS) {
+  if (!scriptSetup) {
+    if (!script) {
+      throw new Error(`[@vue/compiler-sfc] SFC contains no <script> tags.`)
+    }
+
+    // normal <script> only
+    if (script.lang && !isJSOrTS) {
+      // do not process non js/ts script blocks
+      return script
+    }
+
+    const ctx = new ScriptCompileContext(sfc, options)
+    return processNormalScript(ctx, scopeId)
+  }
+
+  if (scriptSetupLang && !isJSOrTS) {
     // do not process non js/ts script blocks
     return scriptSetup
   }
 
+  const ctx = new ScriptCompileContext(sfc, options)
+
   // metadata that needs to be returned
   // const ctx.bindingMetadata: BindingMetadata = {}
   const scriptBindings: Record<string, BindingTypes> = Object.create(null)
@@ -540,7 +557,7 @@ export function compileScript(
           }
 
           // defineProps
-          const isDefineProps = processDefineProps(ctx, init, decl.id)
+          const isDefineProps = processDefineProps(ctx, init, decl.id as LVal)
           if (ctx.propsDestructureRestId) {
             setupBindings[ctx.propsDestructureRestId] =
               BindingTypes.SETUP_REACTIVE_CONST
@@ -548,10 +565,10 @@ export function compileScript(
 
           // defineEmits
           const isDefineEmits =
-            !isDefineProps && processDefineEmits(ctx, init, decl.id)
+            !isDefineProps && processDefineEmits(ctx, init, decl.id as LVal)
           !isDefineEmits &&
-            (processDefineSlots(ctx, init, decl.id) ||
+            (processDefineSlots(ctx, init, decl.id as LVal) ||
-              processDefineModel(ctx, init, decl.id))
+              processDefineModel(ctx, init, decl.id as LVal))
 
           if (
             isDefineProps &&

packages/compiler-sfc/src/script/context.ts

@@ -9,6 +9,7 @@ import type { BindingMetadata } from '../../../compiler-core/src'
 import MagicString from 'magic-string'
 import type { TypeScope } from './resolveType'
 import { warn } from '../warn'
+import { isJS, isTS } from './utils'
 
 export class ScriptCompileContext {
   isJS: boolean
@@ -87,16 +88,8 @@ export class ScriptCompileContext {
     const scriptLang = script && script.lang
     const scriptSetupLang = scriptSetup && scriptSetup.lang
 
-    this.isJS =
+    this.isJS = isJS(scriptLang, scriptSetupLang)
-      scriptLang === 'js' ||
+    this.isTS = isTS(scriptLang, scriptSetupLang)
-      scriptLang === 'jsx' ||
-      scriptSetupLang === 'js' ||
-      scriptSetupLang === 'jsx'
-    this.isTS =
-      scriptLang === 'ts' ||
-      scriptLang === 'tsx' ||
-      scriptSetupLang === 'ts' ||
-      scriptSetupLang === 'tsx'
 
     const customElement = options.customElement
     const filename = this.descriptor.filename

packages/compiler-sfc/src/script/defineModel.ts

@@ -114,7 +114,7 @@ export function processDefineModel(
   return true
 }
 
-export function genModelProps(ctx: ScriptCompileContext) {
+export function genModelProps(ctx: ScriptCompileContext): string | undefined {
   if (!ctx.hasDefineModelCall) return
 
   const isProd = !!ctx.options.isProd

packages/compiler-sfc/src/script/normalScript.ts

@@ -12,10 +12,6 @@ export function processNormalScript(
   scopeId: string,
 ): SFCScriptBlock {
   const script = ctx.descriptor.script!
-  if (script.lang && !ctx.isJS && !ctx.isTS) {
-    // do not process non js/ts script blocks
-    return script
-  }
   try {
     let content = script.content
     let map = script.map

packages/compiler-sfc/src/script/resolveType.ts

@@ -1029,6 +1029,14 @@ function resolveWithTS(
     if (configs.length === 1) {
       matchedConfig = configs[0]
     } else {
+      const [major, minor] = ts.versionMajorMinor.split('.').map(Number)
+      const getPattern = (base: string, p: string) => {
+        // ts 5.5+ supports ${configDir} in paths
+        const supportsConfigDir = major > 5 || (major === 5 && minor >= 5)
+        return p.startsWith('${configDir}') && supportsConfigDir
+          ? normalizePath(p.replace('${configDir}', dirname(configPath!)))
+          : joinPaths(base, p)
+      }
       // resolve which config matches the current file
       for (const c of configs) {
         const base = normalizePath(
@@ -1039,11 +1047,11 @@ function resolveWithTS(
         const excluded: string[] | undefined = c.config.raw?.exclude
         if (
           (!included && (!base || containingFile.startsWith(base))) ||
-          included?.some(p => isMatch(containingFile, joinPaths(base, p)))
+          included?.some(p => isMatch(containingFile, getPattern(base, p)))
         ) {
           if (
             excluded &&
-            excluded.some(p => isMatch(containingFile, joinPaths(base, p)))
+            excluded.some(p => isMatch(containingFile, getPattern(base, p)))
           ) {
             continue
           }
@@ -1296,7 +1304,12 @@ function recordTypes(
         }
       } else if (stmt.type === 'TSModuleDeclaration' && stmt.global) {
         for (const s of (stmt.body as TSModuleBlock).body) {
-          recordType(s, types, declares)
+          if (s.type === 'ExportNamedDeclaration' && s.declaration) {
+            // Handle export declarations inside declare global
+            recordType(s.declaration, types, declares)
+          } else {
+            recordType(s, types, declares)
+          }
         }
       }
     } else {
@@ -1500,6 +1513,7 @@ export function inferRuntimeType(
   node: Node & MaybeWithScope,
   scope: TypeScope = node._ownerScope || ctxToScope(ctx),
   isKeyOf = false,
+  typeParameters?: Record<string, Node>,
 ): string[] {
   try {
     switch (node.type) {
@@ -1589,17 +1603,42 @@ export function inferRuntimeType(
         const resolved = resolveTypeReference(ctx, node, scope)
         if (resolved) {
           if (resolved.type === 'TSTypeAliasDeclaration') {
-            return inferRuntimeType(
+            // #13240
-              ctx,
+            // Special case for function type aliases to ensure correct runtime behavior
-              resolved.typeAnnotation,
+            // other type aliases still fallback to unknown as before
-              resolved._ownerScope,
+            if (resolved.typeAnnotation.type === 'TSFunctionType') {
-              isKeyOf,
+              return ['Function']
-            )
+            }
+
+            if (node.typeParameters) {
+              const typeParams: Record<string, Node> = Object.create(null)
+              if (resolved.typeParameters) {
+                resolved.typeParameters.params.forEach((p, i) => {
+                  typeParams![p.name] = node.typeParameters!.params[i]
+                })
+              }
+              return inferRuntimeType(
+                ctx,
+                resolved.typeAnnotation,
+                resolved._ownerScope,
+                isKeyOf,
+                typeParams,
+              )
+            }
           }
+
           return inferRuntimeType(ctx, resolved, resolved._ownerScope, isKeyOf)
         }
-
         if (node.typeName.type === 'Identifier') {
+          if (typeParameters && typeParameters[node.typeName.name]) {
+            return inferRuntimeType(
+              ctx,
+              typeParameters[node.typeName.name],
+              scope,
+              isKeyOf,
+              typeParameters,
+            )
+          }
           if (isKeyOf) {
             switch (node.typeName.name) {
               case 'String':
@@ -1732,11 +1771,15 @@ export function inferRuntimeType(
         return inferRuntimeType(ctx, node.typeAnnotation, scope)
 
       case 'TSUnionType':
-        return flattenTypes(ctx, node.types, scope, isKeyOf)
+        return flattenTypes(ctx, node.types, scope, isKeyOf, typeParameters)
       case 'TSIntersectionType': {
-        return flattenTypes(ctx, node.types, scope, isKeyOf).filter(
+        return flattenTypes(
-          t => t !== UNKNOWN_TYPE,
+          ctx,
-        )
+          node.types,
+          scope,
+          isKeyOf,
+          typeParameters,
+        ).filter(t => t !== UNKNOWN_TYPE)
       }
 
       case 'TSEnumDeclaration':
@@ -1807,14 +1850,17 @@ function flattenTypes(
   types: TSType[],
   scope: TypeScope,
   isKeyOf: boolean = false,
+  typeParameters: Record<string, Node> | undefined = undefined,
 ): string[] {
   if (types.length === 1) {
-    return inferRuntimeType(ctx, types[0], scope, isKeyOf)
+    return inferRuntimeType(ctx, types[0], scope, isKeyOf, typeParameters)
   }
   return [
     ...new Set(
       ([] as string[]).concat(
-        ...types.map(t => inferRuntimeType(ctx, t, scope, isKeyOf)),
+        ...types.map(t =>
+          inferRuntimeType(ctx, t, scope, isKeyOf, typeParameters),
+        ),
       ),
     ),
   ]

packages/compiler-sfc/src/script/utils.ts

@@ -121,3 +121,8 @@ export const propNameEscapeSymbolsRE: RegExp =
 export function getEscapedPropName(key: string): string {
   return propNameEscapeSymbolsRE.test(key) ? JSON.stringify(key) : key
 }
+
+export const isJS = (...langs: (string | null | undefined)[]): boolean =>
+  langs.some(lang => lang === 'js' || lang === 'jsx')
+export const isTS = (...langs: (string | null | undefined)[]): boolean =>
+  langs.some(lang => lang === 'ts' || lang === 'tsx')

packages/compiler-sfc/src/style/cssVars.ts

@@ -23,7 +23,12 @@ export function genCssVarsFromList(
   return `{\n  ${vars
     .map(
       key =>
-        `"${isSSR ? `--` : ``}${genVarName(id, key, isProd, isSSR)}": (${key})`,
+        // The `:` prefix here is used in `ssrRenderStyle` to distinguish whether
+        // a custom property comes from `ssrCssVars`. If it does, we need to reset
+        // its value to `initial` on the component instance to avoid unintentionally
+        // inheriting the same property value from a different instance of the same
+        // component in the outer scope.
+        `"${isSSR ? `:--` : ``}${genVarName(id, key, isProd, isSSR)}": (${key})`,
     )
     .join(',\n  ')}\n}`
 }

packages/compiler-sfc/src/style/pluginScoped.ts

@@ -8,8 +8,9 @@ import {
 import selectorParser from 'postcss-selector-parser'
 import { warn } from '../warn'
 
-const animationNameRE = /^(-\w+-)?animation-name$/
+const animationNameRE = /^(?:-\w+-)?animation-name$/
-const animationRE = /^(-\w+-)?animation$/
+const animationRE = /^(?:-\w+-)?animation$/
+const keyframesRE = /^(?:-\w+-)?keyframes$/
 
 const scopedPlugin: PluginCreator<string> = (id = '') => {
   const keyframes = Object.create(null)
@@ -21,10 +22,7 @@ const scopedPlugin: PluginCreator<string> = (id = '') => {
       processRule(id, rule)
     },
     AtRule(node) {
-      if (
+      if (keyframesRE.test(node.name) && !node.params.endsWith(`-${shortId}`)) {
-        /-?keyframes$/.test(node.name) &&
-        !node.params.endsWith(`-${shortId}`)
-      ) {
         // register keyframes
         keyframes[node.params] = node.params = node.params + '-' + shortId
       }
@@ -72,7 +70,7 @@ function processRule(id: string, rule: Rule) {
     processedRules.has(rule) ||
     (rule.parent &&
       rule.parent.type === 'atrule' &&
-      /-?keyframes$/.test((rule.parent as AtRule).name))
+      keyframesRE.test((rule.parent as AtRule).name))
   ) {
     return
   }

packages/compiler-sfc/src/template/templateUtils.ts

@@ -6,7 +6,7 @@ export function isRelativeUrl(url: string): boolean {
   return firstChar === '.' || firstChar === '~' || firstChar === '@'
 }
 
-const externalRE = /^(https?:)?\/\//
+const externalRE = /^(?:https?:)?\/\//
 export function isExternalUrl(url: string): boolean {
   return externalRE.test(url)
 }

packages/compiler-sfc/src/template/transformSrcset.ts

@@ -71,6 +71,7 @@ export const transformSrcset: NodeTransform = (
 
           const shouldProcessUrl = (url: string) => {
             return (
+              url &&
               !isExternalUrl(url) &&
               !isDataUrl(url) &&
               (options.includeAbsolute || isRelativeUrl(url))

packages/compiler-ssr/__tests__/ssrComponent.spec.ts

@@ -317,6 +317,35 @@ describe('ssr: components', () => {
       `)
     })
 
+    // #13724
+    test('slot content with v-memo', () => {
+      const { code } = compile(`<foo><bar v-memo="[]" /></foo>`)
+      expect(code).not.toMatch(`_cache`)
+      expect(compile(`<foo><bar v-memo="[]" /></foo>`).code)
+        .toMatchInlineSnapshot(`
+        "const { resolveComponent: _resolveComponent, withCtx: _withCtx, createVNode: _createVNode } = require("vue")
+        const { ssrRenderComponent: _ssrRenderComponent } = require("vue/server-renderer")
+
+        return function ssrRender(_ctx, _push, _parent, _attrs) {
+          const _component_foo = _resolveComponent("foo")
+          const _component_bar = _resolveComponent("bar")
+
+          _push(_ssrRenderComponent(_component_foo, _attrs, {
+            default: _withCtx((_, _push, _parent, _scopeId) => {
+              if (_push) {
+                _push(_ssrRenderComponent(_component_bar, null, null, _parent, _scopeId))
+              } else {
+                return [
+                  _createVNode(_component_bar)
+                ]
+              }
+            }),
+            _: 1 /* STABLE */
+          }, _parent))
+        }"
+      `)
+    })
+
     describe('built-in fallthroughs', () => {
       test('transition', () => {
         expect(compile(`<transition><div/></transition>`).code)

packages/compiler-ssr/__tests__/ssrVModel.spec.ts

@@ -166,6 +166,132 @@ describe('ssr: v-model', () => {
         _push(\`</optgroup></select></div>\`)
       }"
     `)
+
+    expect(
+      compileWithWrapper(`
+        <select multiple v-model="model">
+          <optgroup>
+            <option v-for="item in items" :value="item">{{item}}</option>
+          </optgroup>
+        </select>`).code,
+    ).toMatchInlineSnapshot(`
+      "const { ssrRenderAttr: _ssrRenderAttr, ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs, ssrInterpolate: _ssrInterpolate, ssrRenderList: _ssrRenderList } = require("vue/server-renderer")
+
+      return function ssrRender(_ctx, _push, _parent, _attrs) {
+        _push(\`<div\${_ssrRenderAttrs(_attrs)}><select multiple><optgroup><!--[-->\`)
+        _ssrRenderList(_ctx.items, (item) => {
+          _push(\`<option\${
+            _ssrRenderAttr("value", item)
+          }\${
+            (_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
+              ? _ssrLooseContain(_ctx.model, item)
+              : _ssrLooseEqual(_ctx.model, item))) ? " selected" : ""
+          }>\${
+            _ssrInterpolate(item)
+          }</option>\`)
+        })
+        _push(\`<!--]--></optgroup></select></div>\`)
+      }"
+    `)
+
+    expect(
+      compileWithWrapper(`
+        <select multiple v-model="model">
+          <optgroup>
+            <option v-if="true" :value="item">{{item}}</option>
+          </optgroup>
+        </select>`).code,
+    ).toMatchInlineSnapshot(`
+      "const { ssrRenderAttr: _ssrRenderAttr, ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs, ssrInterpolate: _ssrInterpolate } = require("vue/server-renderer")
+
+      return function ssrRender(_ctx, _push, _parent, _attrs) {
+        _push(\`<div\${_ssrRenderAttrs(_attrs)}><select multiple><optgroup>\`)
+        if (true) {
+          _push(\`<option\${
+            _ssrRenderAttr("value", _ctx.item)
+          }\${
+            (_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
+              ? _ssrLooseContain(_ctx.model, _ctx.item)
+              : _ssrLooseEqual(_ctx.model, _ctx.item))) ? " selected" : ""
+          }>\${
+            _ssrInterpolate(_ctx.item)
+          }</option>\`)
+        } else {
+          _push(\`<!---->\`)
+        }
+        _push(\`</optgroup></select></div>\`)
+      }"
+    `)
+
+    expect(
+      compileWithWrapper(`
+        <select multiple v-model="model">
+          <optgroup>
+            <template v-if="ok">
+              <option v-for="item in items" :value="item">{{item}}</option>
+            </template>
+          </optgroup>
+        </select>`).code,
+    ).toMatchInlineSnapshot(`
+      "const { ssrRenderAttr: _ssrRenderAttr, ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs, ssrInterpolate: _ssrInterpolate, ssrRenderList: _ssrRenderList } = require("vue/server-renderer")
+
+      return function ssrRender(_ctx, _push, _parent, _attrs) {
+        _push(\`<div\${_ssrRenderAttrs(_attrs)}><select multiple><optgroup>\`)
+        if (_ctx.ok) {
+          _push(\`<!--[-->\`)
+          _ssrRenderList(_ctx.items, (item) => {
+            _push(\`<option\${
+              _ssrRenderAttr("value", item)
+            }\${
+              (_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
+                ? _ssrLooseContain(_ctx.model, item)
+                : _ssrLooseEqual(_ctx.model, item))) ? " selected" : ""
+            }>\${
+              _ssrInterpolate(item)
+            }</option>\`)
+          })
+          _push(\`<!--]-->\`)
+        } else {
+          _push(\`<!---->\`)
+        }
+        _push(\`</optgroup></select></div>\`)
+      }"
+    `)
+
+    expect(
+      compileWithWrapper(`
+        <select multiple v-model="model">
+          <optgroup>
+            <template v-for="item in items" :value="item">
+              <option v-if="item===1" :value="item">{{item}}</option>
+            </template>
+          </optgroup>
+        </select>`).code,
+    ).toMatchInlineSnapshot(`
+      "const { ssrRenderAttr: _ssrRenderAttr, ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs, ssrInterpolate: _ssrInterpolate, ssrRenderList: _ssrRenderList } = require("vue/server-renderer")
+
+      return function ssrRender(_ctx, _push, _parent, _attrs) {
+        _push(\`<div\${_ssrRenderAttrs(_attrs)}><select multiple><optgroup><!--[-->\`)
+        _ssrRenderList(_ctx.items, (item) => {
+          _push(\`<!--[-->\`)
+          if (item===1) {
+            _push(\`<option\${
+              _ssrRenderAttr("value", item)
+            }\${
+              (_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
+                ? _ssrLooseContain(_ctx.model, item)
+                : _ssrLooseEqual(_ctx.model, item))) ? " selected" : ""
+            }>\${
+              _ssrInterpolate(item)
+            }</option>\`)
+          } else {
+            _push(\`<!---->\`)
+          }
+          _push(\`<!--]-->\`)
+        })
+        _push(\`<!--]--></optgroup></select></div>\`)
+      }"
+    `)
   })
 
   test('<input type="radio">', () => {

packages/compiler-ssr/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/compiler-ssr",
-  "version": "3.5.16",
+  "version": "3.5.21",
   "description": "@vue/compiler-ssr",
   "main": "dist/compiler-ssr.cjs.js",
   "types": "dist/compiler-ssr.d.ts",

packages/compiler-ssr/src/errors.ts

@@ -29,7 +29,7 @@ if (__TEST__) {
   if (SSRErrorCodes.X_SSR_UNSAFE_ATTR_NAME < DOMErrorCodes.__EXTEND_POINT__) {
     throw new Error(
       `SSRErrorCodes need to be updated to ${
-        DOMErrorCodes.__EXTEND_POINT__ + 1
+        DOMErrorCodes.__EXTEND_POINT__
       } to match extension point from core DOMErrorCodes.`,
     )
   }

packages/compiler-ssr/src/transforms/ssrVIf.ts

@@ -17,7 +17,7 @@ import {
 
 // Plugin for the first transform pass, which simply constructs the AST node
 export const ssrTransformIf: NodeTransform = createStructuralDirectiveTransform(
-  /^(if|else|else-if)$/,
+  /^(?:if|else|else-if)$/,
   processIf,
 )
 

packages/compiler-ssr/src/transforms/ssrVModel.ts

@@ -39,6 +39,18 @@ export const ssrTransformModel: DirectiveTransform = (dir, node, context) => {
     }
   }
 
+  const processSelectChildren = (children: TemplateChildNode[]) => {
+    children.forEach(child => {
+      if (child.type === NodeTypes.ELEMENT) {
+        processOption(child as PlainElementNode)
+      } else if (child.type === NodeTypes.FOR) {
+        processSelectChildren(child.children)
+      } else if (child.type === NodeTypes.IF) {
+        child.branches.forEach(b => processSelectChildren(b.children))
+      }
+    })
+  }
+
   function processOption(plainNode: PlainElementNode) {
     if (plainNode.tag === 'option') {
       if (plainNode.props.findIndex(p => p.name === 'selected') === -1) {
@@ -65,9 +77,7 @@ export const ssrTransformModel: DirectiveTransform = (dir, node, context) => {
         )
       }
     } else if (plainNode.tag === 'optgroup') {
-      plainNode.children.forEach(option =>
+      processSelectChildren(plainNode.children)
-        processOption(option as PlainElementNode),
-      )
     }
   }
 
@@ -163,18 +173,7 @@ export const ssrTransformModel: DirectiveTransform = (dir, node, context) => {
       checkDuplicatedValue()
       node.children = [createInterpolation(model, model.loc)]
     } else if (node.tag === 'select') {
-      const processChildren = (children: TemplateChildNode[]) => {
+      processSelectChildren(node.children)
-        children.forEach(child => {
-          if (child.type === NodeTypes.ELEMENT) {
-            processOption(child as PlainElementNode)
-          } else if (child.type === NodeTypes.FOR) {
-            processChildren(child.children)
-          } else if (child.type === NodeTypes.IF) {
-            child.branches.forEach(b => processChildren(b.children))
-          }
-        })
-      }
-      processChildren(node.children)
     } else {
       context.onError(
         createDOMCompilerError(

packages/reactivity/__tests__/readonly.spec.ts

@@ -498,9 +498,10 @@ describe('reactivity/readonly', () => {
     const r = ref(false)
     const ror = readonly(r)
     const obj = reactive({ ror })
-    expect(() => {
+    obj.ror = true
-      obj.ror = true
+    expect(
-    }).toThrow()
+      `Set operation on key "ror" failed: target is readonly.`,
+    ).toHaveBeenWarned()
     expect(obj.ror).toBe(false)
   })
 

packages/reactivity/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/reactivity",
-  "version": "3.5.16",
+  "version": "3.5.21",
   "description": "@vue/reactivity",
   "main": "index.js",
   "module": "dist/reactivity.esm-bundler.js",

packages/reactivity/src/arrayInstrumentations.ts

@@ -107,7 +107,7 @@ export const arrayInstrumentations: Record<string | symbol, Function> = <any>{
     return reactiveReadArray(this).join(separator)
   },
 
-  // keys() iterator only reads `length`, no optimisation required
+  // keys() iterator only reads `length`, no optimization required
 
   lastIndexOf(...args: unknown[]) {
     return searchProxy(this, 'lastIndexOf', args)
@@ -200,7 +200,7 @@ function iterator(
   wrapValue: (value: any) => unknown,
 ) {
   // note that taking ARRAY_ITERATE dependency here is not strictly equivalent
-  // to calling iterate on the proxified array.
+  // to calling iterate on the proxied array.
   // creating the iterator does not access any array property:
   // it is only when .next() is called that length and indexes are accessed.
   // pushed to the extreme, an iterator could be created in one effect scope,

packages/reactivity/src/baseHandlers.ts

@@ -153,7 +153,13 @@ class MutableReactiveHandler extends BaseReactiveHandler {
       }
       if (!isArray(target) && isRef(oldValue) && !isRef(value)) {
         if (isOldValueReadonly) {
-          return false
+          if (__DEV__) {
+            warn(
+              `Set operation on key "${String(key)}" failed: target is readonly.`,
+              target[key],
+            )
+          }
+          return true
         } else {
           oldValue.value = value
           return true

packages/reactivity/src/collectionHandlers.ts

@@ -125,7 +125,7 @@ function createInstrumentations(
     get size() {
       const target = (this as unknown as IterableCollections)[ReactiveFlags.RAW]
       !readonly && track(toRaw(target), TrackOpTypes.ITERATE, ITERATE_KEY)
-      return Reflect.get(target, 'size', target)
+      return target.size
     },
     has(this: CollectionTypes, key: unknown): boolean {
       const target = this[ReactiveFlags.RAW]

packages/reactivity/src/ref.ts

@@ -275,7 +275,7 @@ export function proxyRefs<T extends object>(
   objectWithRefs: T,
 ): ShallowUnwrapRef<T> {
   return isReactive(objectWithRefs)
-    ? objectWithRefs
+    ? (objectWithRefs as ShallowUnwrapRef<T>)
     : new Proxy(objectWithRefs, shallowUnwrapHandlers)
 }
 

packages/reactivity/src/watch.ts

@@ -331,17 +331,17 @@ export function watch(
 export function traverse(
   value: unknown,
   depth: number = Infinity,
-  seen?: Set<unknown>,
+  seen?: Map<unknown, number>,
 ): unknown {
   if (depth <= 0 || !isObject(value) || (value as any)[ReactiveFlags.SKIP]) {
     return value
   }
 
-  seen = seen || new Set()
+  seen = seen || new Map()
-  if (seen.has(value)) {
+  if ((seen.get(value) || 0) >= depth) {
     return value
   }
-  seen.add(value)
+  seen.set(value, depth)
   depth--
   if (isRef(value)) {
     traverse(value.value, depth, seen)

packages/runtime-core/__tests__/apiWatch.spec.ts

@@ -1689,6 +1689,57 @@ describe('api: watch', () => {
     expect(cb).toHaveBeenCalledTimes(4)
   })
 
+  test('watching the same object at different depths', async () => {
+    const arr1: any[] = reactive([[[{ foo: {} }]]])
+    const arr2 = arr1[0]
+    const arr3 = arr2[0]
+    const obj = arr3[0]
+    arr1.push(arr3)
+
+    const cb1 = vi.fn()
+    const cb2 = vi.fn()
+    const cb3 = vi.fn()
+    const cb4 = vi.fn()
+    watch(arr1, cb1, { deep: 1 })
+    watch(arr1, cb2, { deep: 2 })
+    watch(arr1, cb3, { deep: 3 })
+    watch(arr1, cb4, { deep: 4 })
+
+    await nextTick()
+    expect(cb1).toHaveBeenCalledTimes(0)
+    expect(cb2).toHaveBeenCalledTimes(0)
+    expect(cb3).toHaveBeenCalledTimes(0)
+    expect(cb4).toHaveBeenCalledTimes(0)
+
+    obj.foo = {}
+    await nextTick()
+    expect(cb1).toHaveBeenCalledTimes(0)
+    expect(cb2).toHaveBeenCalledTimes(0)
+    expect(cb3).toHaveBeenCalledTimes(1)
+    expect(cb4).toHaveBeenCalledTimes(1)
+
+    obj.foo.bar = 1
+    await nextTick()
+    expect(cb1).toHaveBeenCalledTimes(0)
+    expect(cb2).toHaveBeenCalledTimes(0)
+    expect(cb3).toHaveBeenCalledTimes(1)
+    expect(cb4).toHaveBeenCalledTimes(2)
+
+    arr3.push(obj.foo)
+    await nextTick()
+    expect(cb1).toHaveBeenCalledTimes(0)
+    expect(cb2).toHaveBeenCalledTimes(1)
+    expect(cb3).toHaveBeenCalledTimes(2)
+    expect(cb4).toHaveBeenCalledTimes(3)
+
+    obj.foo.bar = 2
+    await nextTick()
+    expect(cb1).toHaveBeenCalledTimes(0)
+    expect(cb2).toHaveBeenCalledTimes(1)
+    expect(cb3).toHaveBeenCalledTimes(3)
+    expect(cb4).toHaveBeenCalledTimes(4)
+  })
+
   test('pause / resume', async () => {
     const count = ref(0)
     const cb = vi.fn()

packages/runtime-core/__tests__/componentEmits.spec.ts

@@ -3,6 +3,7 @@
 
 import {
   type ComponentPublicInstance,
+  createApp,
   defineComponent,
   h,
   nextTick,
@@ -598,4 +599,45 @@ describe('component: emit', () => {
     render(h(ComponentC), el)
     expect(renderFn).toHaveBeenCalledTimes(1)
   })
+
+  test('merging emits for a component that is also used as a mixin', () => {
+    const render = () => h('div')
+    const CompA = {
+      render,
+    }
+    const validateByMixin = vi.fn(() => true)
+    const validateByGlobalMixin = vi.fn(() => true)
+
+    const mixin = {
+      emits: {
+        one: validateByMixin,
+      },
+    }
+
+    const CompB = defineComponent({
+      mixins: [mixin, CompA],
+      created(this) {
+        this.$emit('one', 1)
+      },
+      render,
+    })
+
+    const app = createApp({
+      render() {
+        return [h(CompA), h(CompB)]
+      },
+    })
+
+    app.mixin({
+      emits: {
+        one: validateByGlobalMixin,
+        two: null,
+      },
+    })
+
+    const root = nodeOps.createElement('div')
+    app.mount(root)
+    expect(validateByMixin).toHaveBeenCalledTimes(1)
+    expect(validateByGlobalMixin).not.toHaveBeenCalled()
+  })
 })

packages/runtime-core/__tests__/componentPublicInstance.spec.ts

@@ -167,13 +167,26 @@ describe('component: proxy', () => {
       data() {
         return {
           foo: 0,
+          $foo: 0,
         }
       },
+      computed: {
+        cmp: () => {
+          throw new Error('value of cmp should not be accessed')
+        },
+        $cmp: () => {
+          throw new Error('value of $cmp should not be read')
+        },
+      },
       setup() {
         return {
           bar: 1,
         }
       },
+      __cssModules: {
+        $style: {},
+        cssStyles: {},
+      },
       mounted() {
         instanceProxy = this
       },
@@ -181,6 +194,7 @@ describe('component: proxy', () => {
 
     const app = createApp(Comp, { msg: 'hello' })
     app.config.globalProperties.global = 1
+    app.config.globalProperties.$global = 1
 
     app.mount(nodeOps.createElement('div'))
 
@@ -188,12 +202,20 @@ describe('component: proxy', () => {
     expect('msg' in instanceProxy).toBe(true)
     // data
     expect('foo' in instanceProxy).toBe(true)
-    // ctx
+    expect('$foo' in instanceProxy).toBe(false)
+    // setupState
     expect('bar' in instanceProxy).toBe(true)
+    // ctx
+    expect('cmp' in instanceProxy).toBe(true)
+    expect('$cmp' in instanceProxy).toBe(true)
     // public properties
     expect('$el' in instanceProxy).toBe(true)
+    // CSS modules
+    expect('$style' in instanceProxy).toBe(true)
+    expect('cssStyles' in instanceProxy).toBe(true)
     // global properties
     expect('global' in instanceProxy).toBe(true)
+    expect('$global' in instanceProxy).toBe(true)
 
     // non-existent
     expect('$foobar' in instanceProxy).toBe(false)
@@ -202,11 +224,15 @@ describe('component: proxy', () => {
     // #4962 triggering getter should not cause non-existent property to
     // pass the has check
     instanceProxy.baz
+    instanceProxy.$baz
     expect('baz' in instanceProxy).toBe(false)
+    expect('$baz' in instanceProxy).toBe(false)
 
     // set non-existent (goes into proxyTarget sink)
     instanceProxy.baz = 1
     expect('baz' in instanceProxy).toBe(true)
+    instanceProxy.$baz = 1
+    expect('$baz' in instanceProxy).toBe(true)
 
     // dev mode ownKeys check for console inspection
     // should only expose own keys
@@ -214,7 +240,10 @@ describe('component: proxy', () => {
       'msg',
       'bar',
       'foo',
+      'cmp',
+      '$cmp',
       'baz',
+      '$baz',
     ])
   })
 

packages/runtime-core/__tests__/componentSlots.spec.ts

@@ -6,6 +6,8 @@ import {
   nodeOps,
   ref,
   render,
+  serializeInner,
+  useSlots,
 } from '@vue/runtime-test'
 import { createBlock, normalizeVNode } from '../src/vnode'
 import { createSlots } from '../src/helpers/createSlots'
@@ -42,6 +44,25 @@ describe('component: slots', () => {
     expect(slots).toMatchObject({})
   })
 
+  test('initSlots: ensure compiler marker non-enumerable', () => {
+    const Comp = {
+      render() {
+        const slots = useSlots()
+        // Only user-defined slots should be enumerable
+        expect(Object.keys(slots)).toEqual(['foo'])
+
+        // Internal compiler markers must still exist but be non-enumerable
+        expect(slots).toHaveProperty('_')
+        expect(Object.getOwnPropertyDescriptor(slots, '_')!.enumerable).toBe(
+          false,
+        )
+        return h('div')
+      },
+    }
+    const slots = { foo: () => {}, _: 1 }
+    render(createBlock(Comp, null, slots), nodeOps.createElement('div'))
+  })
+
   test('initSlots: should normalize object slots (when value is null, string, array)', () => {
     const { slots } = renderWithSlots({
       _inner: '_inner',
@@ -50,6 +71,10 @@ describe('component: slots', () => {
       footer: ['f1', 'f2'],
     })
 
+    expect(
+      '[Vue warn]: Non-function value encountered for slot "_inner". Prefer function slots for better performance.',
+    ).toHaveBeenWarned()
+
     expect(
       '[Vue warn]: Non-function value encountered for slot "header". Prefer function slots for better performance.',
     ).toHaveBeenWarned()
@@ -58,8 +83,8 @@ describe('component: slots', () => {
       '[Vue warn]: Non-function value encountered for slot "footer". Prefer function slots for better performance.',
     ).toHaveBeenWarned()
 
-    expect(slots).not.toHaveProperty('_inner')
     expect(slots).not.toHaveProperty('foo')
+    expect(slots._inner()).toMatchObject([normalizeVNode('_inner')])
     expect(slots.header()).toMatchObject([normalizeVNode('header')])
     expect(slots.footer()).toMatchObject([
       normalizeVNode('f1'),
@@ -418,4 +443,22 @@ describe('component: slots', () => {
       'Slot "default" invoked outside of the render function',
     ).toHaveBeenWarned()
   })
+
+  test('slot name starts with underscore', () => {
+    const Comp = {
+      setup(_: any, { slots }: any) {
+        return () => slots._foo()
+      },
+    }
+
+    const App = {
+      setup() {
+        return () => h(Comp, null, { _foo: () => 'foo' })
+      },
+    }
+
+    const root = nodeOps.createElement('div')
+    createApp(App).mount(root)
+    expect(serializeInner(root)).toBe('foo')
+  })
 })

packages/runtime-core/__tests__/components/Suspense.spec.ts

@@ -17,6 +17,8 @@ import {
   onUnmounted,
   ref,
   render,
+  renderList,
+  renderSlot,
   resolveDynamicComponent,
   serializeInner,
   shallowRef,
@@ -2161,6 +2163,80 @@ describe('Suspense', () => {
     await Promise.all(deps)
   })
 
+  // #13453
+  test('add new async deps during patching', async () => {
+    const getComponent = (type: string) => {
+      if (type === 'A') {
+        return defineAsyncComponent({
+          setup() {
+            return () => h('div', 'A')
+          },
+        })
+      }
+      return defineAsyncComponent({
+        setup() {
+          return () => h('div', 'B')
+        },
+      })
+    }
+
+    const types = ref(['A'])
+    const add = async () => {
+      types.value.push('B')
+    }
+
+    const update = async () => {
+      // mount Suspense B
+      // [Suspense A] -> [Suspense A(pending), Suspense B(pending)]
+      await add()
+      // patch Suspense B (still pending)
+      // [Suspense A(pending), Suspense B(pending)] -> [Suspense B(pending)]
+      types.value.shift()
+    }
+
+    const Comp = {
+      render(this: any) {
+        return h(Fragment, null, [
+          renderList(types.value, type => {
+            return h(
+              Suspense,
+              { key: type },
+              {
+                default: () => [
+                  renderSlot(this.$slots, 'default', { type: type }),
+                ],
+              },
+            )
+          }),
+        ])
+      },
+    }
+
+    const App = {
+      setup() {
+        return () =>
+          h(Comp, null, {
+            default: (params: any) => [h(getComponent(params.type))],
+          })
+      },
+    }
+
+    const root = nodeOps.createElement('div')
+    render(h(App), root)
+    expect(serializeInner(root)).toBe(`<!---->`)
+
+    await Promise.all(deps)
+    expect(serializeInner(root)).toBe(`<div>A</div>`)
+
+    update()
+    await nextTick()
+    // wait for both A and B to resolve
+    await Promise.all(deps)
+    // wait for new B to resolve
+    await Promise.all(deps)
+    expect(serializeInner(root)).toBe(`<div>B</div>`)
+  })
+
   describe('warnings', () => {
     // base function to check if a combination of slots warns or not
     function baseCheckWarn(
@@ -2230,5 +2306,57 @@ describe('Suspense', () => {
         fallback: [h('div'), h('div')],
       })
     })
+
+    // #13559
+    test('renders multiple async components in Suspense with v-for and updates on items change', async () => {
+      const CompAsyncSetup = defineAsyncComponent({
+        props: ['item'],
+        render(ctx: any) {
+          return h('div', ctx.item.name)
+        },
+      })
+
+      const items = ref([
+        { id: 1, name: '111' },
+        { id: 2, name: '222' },
+        { id: 3, name: '333' },
+      ])
+
+      const Comp = {
+        setup() {
+          return () =>
+            h(Suspense, null, {
+              default: () =>
+                h(
+                  Fragment,
+                  null,
+                  items.value.map(item =>
+                    h(CompAsyncSetup, { item, key: item.id }),
+                  ),
+                ),
+            })
+        },
+      }
+
+      const root = nodeOps.createElement('div')
+      render(h(Comp), root)
+      await nextTick()
+      await Promise.all(deps)
+
+      expect(serializeInner(root)).toBe(
+        `<div>111</div><div>222</div><div>333</div>`,
+      )
+
+      items.value = [
+        { id: 4, name: '444' },
+        { id: 5, name: '555' },
+        { id: 6, name: '666' },
+      ]
+      await nextTick()
+      await Promise.all(deps)
+      expect(serializeInner(root)).toBe(
+        `<div>444</div><div>555</div><div>666</div>`,
+      )
+    })
   })
 })

packages/runtime-core/__tests__/helpers/useTemplateRef.spec.ts

@@ -106,6 +106,134 @@ describe('useTemplateRef', () => {
     expect(tRef!.value).toBe(null)
   })
 
+  test('should work when used with direct ref value with ref_key', () => {
+    let tRef: ShallowRef
+    const key = 'refKey'
+    const Comp = {
+      setup() {
+        tRef = useTemplateRef(key)
+        return () => h('div', { ref: tRef, ref_key: key })
+      },
+    }
+    const root = nodeOps.createElement('div')
+    render(h(Comp), root)
+
+    expect('target is readonly').not.toHaveBeenWarned()
+    expect(tRef!.value).toBe(root.children[0])
+  })
+
+  test('should work when used with direct ref value with ref_key and ref_for', () => {
+    let tRef: ShallowRef
+    const key = 'refKey'
+    const Comp = {
+      setup() {
+        tRef = useTemplateRef(key)
+      },
+      render() {
+        return h(
+          'div',
+          [1, 2, 3].map(x =>
+            h('span', { ref: tRef, ref_key: key, ref_for: true }, x.toString()),
+          ),
+        )
+      },
+    }
+    const root = nodeOps.createElement('div')
+    render(h(Comp), root)
+
+    expect('target is readonly').not.toHaveBeenWarned()
+    expect(tRef!.value).toHaveLength(3)
+  })
+
+  test('should work when used with direct ref value with ref_key and dynamic value', async () => {
+    const refMode = ref('h1-ref')
+
+    let tRef: ShallowRef
+    const key = 'refKey'
+
+    const Comp = {
+      setup() {
+        tRef = useTemplateRef(key)
+      },
+      render() {
+        switch (refMode.value) {
+          case 'h1-ref':
+            return h('h1', { ref: tRef, ref_key: key })
+          case 'h2-ref':
+            return h('h2', { ref: tRef, ref_key: key })
+          case 'no-ref':
+            return h('span')
+          case 'nothing':
+            return null
+        }
+      },
+    }
+
+    const root = nodeOps.createElement('div')
+    render(h(Comp), root)
+
+    expect(tRef!.value.tag).toBe('h1')
+
+    refMode.value = 'h2-ref'
+    await nextTick()
+    expect(tRef!.value.tag).toBe('h2')
+
+    refMode.value = 'no-ref'
+    await nextTick()
+    expect(tRef!.value).toBeNull()
+
+    refMode.value = 'nothing'
+    await nextTick()
+    expect(tRef!.value).toBeNull()
+
+    expect('target is readonly').not.toHaveBeenWarned()
+  })
+
+  test('should work when used with dynamic direct refs and ref_keys', async () => {
+    const refKey = ref('foo')
+
+    let tRefs: Record<string, ShallowRef>
+
+    const Comp = {
+      setup() {
+        tRefs = {
+          foo: useTemplateRef('foo'),
+          bar: useTemplateRef('bar'),
+        }
+      },
+      render() {
+        return h('div', { ref: tRefs[refKey.value], ref_key: refKey.value })
+      },
+    }
+
+    const root = nodeOps.createElement('div')
+    render(h(Comp), root)
+
+    expect(tRefs!['foo'].value).toBe(root.children[0])
+    expect(tRefs!['bar'].value).toBeNull()
+
+    refKey.value = 'bar'
+    await nextTick()
+    expect(tRefs!['foo'].value).toBeNull()
+    expect(tRefs!['bar'].value).toBe(root.children[0])
+
+    expect('target is readonly').not.toHaveBeenWarned()
+  })
+
+  test('should not work when used with direct ref value without ref_key (in dev mode)', () => {
+    let tRef: ShallowRef
+    const Comp = {
+      setup() {
+        tRef = useTemplateRef('refKey')
+        return () => h('div', { ref: tRef })
+      },
+    }
+    const root = nodeOps.createElement('div')
+    render(h(Comp), root)
+
+    expect(tRef!.value).toBeNull()
+  })
+
   test('should work when used as direct ref value (compiled in prod mode)', () => {
     __DEV__ = false
     try {
@@ -125,4 +253,65 @@ describe('useTemplateRef', () => {
       __DEV__ = true
     }
   })
+
+  test('should work when used as direct ref value with ref_key and ref_for (compiled in prod mode)', () => {
+    __DEV__ = false
+    try {
+      let tRef: ShallowRef
+      const key = 'refKey'
+      const Comp = {
+        setup() {
+          tRef = useTemplateRef(key)
+        },
+        render() {
+          return h(
+            'div',
+            [1, 2, 3].map(x =>
+              h(
+                'span',
+                { ref: tRef, ref_key: key, ref_for: true },
+                x.toString(),
+              ),
+            ),
+          )
+        },
+      }
+
+      const root = nodeOps.createElement('div')
+      render(h(Comp), root)
+
+      expect('target is readonly').not.toHaveBeenWarned()
+      expect(tRef!.value).toHaveLength(3)
+    } finally {
+      __DEV__ = true
+    }
+  })
+
+  test('should work when used as direct ref value with ref_for but without ref_key (compiled in prod mode)', () => {
+    __DEV__ = false
+    try {
+      let tRef: ShallowRef
+      const Comp = {
+        setup() {
+          tRef = useTemplateRef('refKey')
+        },
+        render() {
+          return h(
+            'div',
+            [1, 2, 3].map(x =>
+              h('span', { ref: tRef, ref_for: true }, x.toString()),
+            ),
+          )
+        },
+      }
+
+      const root = nodeOps.createElement('div')
+      render(h(Comp), root)
+
+      expect('target is readonly').not.toHaveBeenWarned()
+      expect(tRef!.value).toHaveLength(3)
+    } finally {
+      __DEV__ = true
+    }
+  })
 })

packages/runtime-core/__tests__/hmr.spec.ts

@@ -894,4 +894,150 @@ describe('hot module replacement', () => {
     await timeout()
     expect(serializeInner(root)).toBe('<div>bar</div>')
   })
+
+  test('multi reload child wrapped in Suspense + KeepAlive', async () => {
+    const id = 'test-child-reload-3'
+    const Child: ComponentOptions = {
+      __hmrId: id,
+      setup() {
+        const count = ref(0)
+        return { count }
+      },
+      render: compileToFunction(`<div>{{ count }}</div>`),
+    }
+    createRecord(id, Child)
+
+    const appId = 'test-app-id'
+    const App: ComponentOptions = {
+      __hmrId: appId,
+      components: { Child },
+      render: compileToFunction(`
+        <KeepAlive>
+          <Suspense>
+            <Child />
+          </Suspense>
+        </KeepAlive>
+      `),
+    }
+
+    const root = nodeOps.createElement('div')
+    render(h(App), root)
+    expect(serializeInner(root)).toBe('<div>0</div>')
+    await timeout()
+    reload(id, {
+      __hmrId: id,
+      setup() {
+        const count = ref(1)
+        return { count }
+      },
+      render: compileToFunction(`<div>{{ count }}</div>`),
+    })
+    await timeout()
+    expect(serializeInner(root)).toBe('<div>1</div>')
+
+    reload(id, {
+      __hmrId: id,
+      setup() {
+        const count = ref(2)
+        return { count }
+      },
+      render: compileToFunction(`<div>{{ count }}</div>`),
+    })
+    await timeout()
+    expect(serializeInner(root)).toBe('<div>2</div>')
+  })
+
+  test('rerender for nested component', () => {
+    const id = 'child-nested-rerender'
+    const Foo: ComponentOptions = {
+      __hmrId: id,
+      render() {
+        return this.$slots.default()
+      },
+    }
+    createRecord(id, Foo)
+
+    const parentId = 'parent-nested-rerender'
+    const Parent: ComponentOptions = {
+      __hmrId: parentId,
+      render() {
+        return h(Foo, null, {
+          default: () => this.$slots.default(),
+          _: 3 /* FORWARDED */,
+        })
+      },
+    }
+
+    const appId = 'app-nested-rerender'
+    const App: ComponentOptions = {
+      __hmrId: appId,
+      render: () =>
+        h(Parent, null, {
+          default: () => [
+            h(Foo, null, {
+              default: () => ['foo'],
+            }),
+          ],
+        }),
+    }
+    createRecord(parentId, App)
+
+    const root = nodeOps.createElement('div')
+    render(h(App), root)
+    expect(serializeInner(root)).toBe('foo')
+
+    rerender(id, () => 'bar')
+    expect(serializeInner(root)).toBe('bar')
+  })
+
+  // https://github.com/vitejs/vite-plugin-vue/issues/599
+  // Both Outer and Inner are reloaded when './server.js' changes
+  test('reload nested components from single update', async () => {
+    const innerId = 'nested-reload-inner'
+    const outerId = 'nested-reload-outer'
+
+    let Inner = {
+      __hmrId: innerId,
+      render() {
+        return h('div', 'foo')
+      },
+    }
+    let Outer = {
+      __hmrId: outerId,
+      render() {
+        return h(Inner)
+      },
+    }
+
+    createRecord(innerId, Inner)
+    createRecord(outerId, Outer)
+
+    const App = {
+      render: () => h(Outer),
+    }
+
+    const root = nodeOps.createElement('div')
+    render(h(App), root)
+    expect(serializeInner(root)).toBe('<div>foo</div>')
+
+    Inner = {
+      __hmrId: innerId,
+      render() {
+        return h('div', 'bar')
+      },
+    }
+    Outer = {
+      __hmrId: outerId,
+      render() {
+        return h(Inner)
+      },
+    }
+
+    // trigger reload for both Outer and Inner
+    reload(outerId, Outer)
+    reload(innerId, Inner)
+    await nextTick()
+
+    expect(serializeInner(root)).toBe('<div>bar</div>')
+  })
 })

packages/runtime-core/__tests__/hydration.spec.ts

@@ -1160,6 +1160,69 @@ describe('SSR hydration', () => {
     )
   })
 
+  // #13510
+  test('update async component after parent mount before async component resolve', async () => {
+    const Comp = {
+      props: ['toggle'],
+      render(this: any) {
+        return h('h1', [
+          this.toggle ? 'Async component' : 'Updated async component',
+        ])
+      },
+    }
+    let serverResolve: any
+    let AsyncComp = defineAsyncComponent(
+      () =>
+        new Promise(r => {
+          serverResolve = r
+        }),
+    )
+
+    const toggle = ref(true)
+    const App = {
+      setup() {
+        onMounted(() => {
+          // change state, after mount and before async component resolve
+          nextTick(() => (toggle.value = false))
+        })
+
+        return () => {
+          return h(AsyncComp, { toggle: toggle.value })
+        }
+      },
+    }
+
+    // server render
+    const htmlPromise = renderToString(h(App))
+    serverResolve(Comp)
+    const html = await htmlPromise
+    expect(html).toMatchInlineSnapshot(`"<h1>Async component</h1>"`)
+
+    // hydration
+    let clientResolve: any
+    AsyncComp = defineAsyncComponent(
+      () =>
+        new Promise(r => {
+          clientResolve = r
+        }),
+    )
+
+    const container = document.createElement('div')
+    container.innerHTML = html
+    createSSRApp(App).mount(container)
+
+    // resolve
+    clientResolve(Comp)
+    await new Promise(r => setTimeout(r))
+
+    // prevent lazy hydration since the component has been patched
+    expect('Skipping lazy hydration for component').toHaveBeenWarned()
+    expect(`Hydration node mismatch`).not.toHaveBeenWarned()
+    expect(container.innerHTML).toMatchInlineSnapshot(
+      `"<h1>Updated async component</h1>"`,
+    )
+  })
+
   test('hydrate safely when property used by async setup changed before render', async () => {
     const toggle = ref(true)
 
@@ -1677,6 +1740,35 @@ describe('SSR hydration', () => {
     expect(`mismatch`).not.toHaveBeenWarned()
   })
 
+  // #13394
+  test('transition appear work with empty content', async () => {
+    const show = ref(true)
+    const { vnode, container } = mountWithHydration(
+      `<template><!----></template>`,
+      function (this: any) {
+        return h(
+          Transition,
+          { appear: true },
+          {
+            default: () =>
+              show.value
+                ? renderSlot(this.$slots, 'default')
+                : createTextVNode('foo'),
+          },
+        )
+      },
+    )
+
+    // empty slot render as a comment node
+    expect(container.firstChild!.nodeType).toBe(Node.COMMENT_NODE)
+    expect(vnode.el).toBe(container.firstChild)
+    expect(`mismatch`).not.toHaveBeenWarned()
+
+    show.value = false
+    await nextTick()
+    expect(container.innerHTML).toBe('foo')
+  })
+
   test('transition appear with v-if', () => {
     const show = false
     const { vnode, container } = mountWithHydration(
@@ -2265,6 +2357,30 @@ describe('SSR hydration', () => {
       expect(`Hydration style mismatch`).not.toHaveBeenWarned()
     })
 
+    test('with disabled teleport + undefined target', async () => {
+      const container = document.createElement('div')
+      const isOpen = ref(false)
+      const App = {
+        setup() {
+          return { isOpen }
+        },
+        template: `
+          <Teleport :to="undefined" :disabled="true">
+            <div v-if="isOpen">
+              Menu is open...
+            </div>
+          </Teleport>`,
+      }
+      container.innerHTML = await renderToString(h(App))
+      const app = createSSRApp(App)
+      app.mount(container)
+      isOpen.value = true
+      await nextTick()
+      expect(container.innerHTML).toBe(
+        `<!--teleport start--><div> Menu is open... </div><!--teleport end-->`,
+      )
+    })
+
     test('escape css var name', () => {
       const container = document.createElement('div')
       container.innerHTML = `<div style="padding: 4px;--foo\\.bar:red;"></div>`

packages/runtime-core/__tests__/rendererTemplateRef.spec.ts

@@ -10,6 +10,7 @@ import {
   render,
   serializeInner,
   shallowRef,
+  watch,
 } from '@vue/runtime-test'
 
 describe('api: template refs', () => {
@@ -179,6 +180,89 @@ describe('api: template refs', () => {
     expect(el.value).toBe(null)
   })
 
+  // #12639
+  it('update and unmount child in the same tick', async () => {
+    const root = nodeOps.createElement('div')
+    const el = ref(null)
+    const toggle = ref(true)
+    const show = ref(true)
+
+    const Comp = defineComponent({
+      emits: ['change'],
+      props: ['show'],
+      setup(props, { emit }) {
+        watch(
+          () => props.show,
+          () => {
+            emit('change')
+          },
+        )
+        return () => h('div', 'hi')
+      },
+    })
+
+    const App = {
+      setup() {
+        return {
+          refKey: el,
+        }
+      },
+      render() {
+        return toggle.value
+          ? h(Comp, {
+              ref: 'refKey',
+              show: show.value,
+              onChange: () => (toggle.value = false),
+            })
+          : null
+      },
+    }
+    render(h(App), root)
+    expect(el.value).not.toBe(null)
+
+    show.value = false
+    await nextTick()
+    expect(el.value).toBe(null)
+  })
+
+  it('set and change ref in the same tick', async () => {
+    const root = nodeOps.createElement('div')
+    const show = ref(false)
+    const refName = ref('a')
+
+    const Child = defineComponent({
+      setup() {
+        refName.value = 'b'
+        return () => {}
+      },
+    })
+
+    const Comp = {
+      render() {
+        return h(Child, {
+          ref: refName.value,
+        })
+      },
+      updated(this: any) {
+        expect(this.$refs.a).toBe(null)
+        expect(this.$refs.b).not.toBe(null)
+      },
+    }
+
+    const App = {
+      render() {
+        return show.value ? h(Comp) : null
+      },
+    }
+
+    render(h(App), root)
+    expect(refName.value).toBe('a')
+
+    show.value = true
+    await nextTick()
+    expect(refName.value).toBe('b')
+  })
+
   it('unset old ref when new ref is absent', async () => {
     const root1 = nodeOps.createElement('div')
     const root2 = nodeOps.createElement('div')

packages/runtime-core/__tests__/vnode.spec.ts

@@ -553,18 +553,6 @@ describe('vnode', () => {
       expect(vnode.dynamicChildren).toStrictEqual([vnode1])
     })
 
-    test('with suspense', () => {
-      const hoist = createVNode('div')
-      let vnode1
-      const vnode =
-        (openBlock(),
-        createBlock('div', null, [
-          hoist,
-          (vnode1 = createVNode(() => {}, null, 'text')),
-        ]))
-      expect(vnode.dynamicChildren).toStrictEqual([vnode1])
-    })
-
     // #1039
     // <component :is="foo">{{ bar }}</component>
     // - content is compiled as slot

packages/runtime-core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/runtime-core",
-  "version": "3.5.16",
+  "version": "3.5.21",
   "description": "@vue/runtime-core",
   "main": "index.js",
   "module": "dist/runtime-core.esm-bundler.js",

packages/runtime-core/src/apiAsyncComponent.ts

@@ -43,7 +43,7 @@ export interface AsyncComponentOptions<T = any> {
 export const isAsyncWrapper = (i: ComponentInternalInstance | VNode): boolean =>
   !!(i.type as ComponentOptions).__asyncLoader
 
-/*! #__NO_SIDE_EFFECTS__ */
+/*@__NO_SIDE_EFFECTS__*/
 export function defineAsyncComponent<
   T extends Component = { new (): ComponentPublicInstance },
 >(source: AsyncComponentLoader<T> | AsyncComponentOptions<T>): T {
@@ -123,28 +123,30 @@ export function defineAsyncComponent<
 
     __asyncHydrate(el, instance, hydrate) {
       let patched = false
+      ;(instance.bu || (instance.bu = [])).push(() => (patched = true))
+      const performHydrate = () => {
+        // skip hydration if the component has been patched
+        if (patched) {
+          if (__DEV__) {
+            warn(
+              `Skipping lazy hydration for component '${getComponentName(resolvedComp!) || resolvedComp!.__file}': ` +
+                `it was updated before lazy hydration performed.`,
+            )
+          }
+          return
+        }
+        hydrate()
+      }
       const doHydrate = hydrateStrategy
         ? () => {
-            const performHydrate = () => {
-              // skip hydration if the component has been patched
-              if (__DEV__ && patched) {
-                warn(
-                  `Skipping lazy hydration for component '${getComponentName(resolvedComp!)}': ` +
-                    `it was updated before lazy hydration performed.`,
-                )
-                return
-              }
-              hydrate()
-            }
             const teardown = hydrateStrategy(performHydrate, cb =>
               forEachElement(el, cb),
             )
             if (teardown) {
               ;(instance.bum || (instance.bum = [])).push(teardown)
             }
-            ;(instance.u || (instance.u = [])).push(() => (patched = true))
           }
-        : hydrate
+        : performHydrate
       if (resolvedComp) {
         doHydrate()
       } else {

packages/runtime-core/src/apiDefineComponent.ts

@@ -301,7 +301,7 @@ export function defineComponent<
 >
 
 // implementation, close to no-op
-/*! #__NO_SIDE_EFFECTS__ */
+/*@__NO_SIDE_EFFECTS__*/
 export function defineComponent(
   options: unknown,
   extraOptions?: ComponentOptions,

packages/runtime-core/src/apiInject.ts

@@ -1,6 +1,5 @@
 import { isFunction } from '@vue/shared'
-import { currentInstance } from './component'
+import { currentInstance, getCurrentInstance } from './component'
-import { currentRenderingInstance } from './componentRenderContext'
 import { currentApp } from './apiCreateApp'
 import { warn } from './warning'
 
@@ -51,7 +50,7 @@ export function inject(
 ) {
   // fallback to `currentRenderingInstance` so that this can be called in
   // a functional component
-  const instance = currentInstance || currentRenderingInstance
+  const instance = getCurrentInstance()
 
   // also support looking up from app-level provides w/ `app.runWithContext()`
   if (instance || currentApp) {
@@ -90,5 +89,5 @@ export function inject(
  * user. One example is `useRoute()` in `vue-router`.
  */
 export function hasInjectionContext(): boolean {
-  return !!(currentInstance || currentRenderingInstance || currentApp)
+  return !!(getCurrentInstance() || currentApp)
 }

packages/runtime-core/src/apiSetupHelpers.ts

@@ -382,17 +382,17 @@ export function withDefaults<
 }
 
 export function useSlots(): SetupContext['slots'] {
-  return getContext().slots
+  return getContext('useSlots').slots
 }
 
 export function useAttrs(): SetupContext['attrs'] {
-  return getContext().attrs
+  return getContext('useAttrs').attrs
 }
 
-function getContext(): SetupContext {
+function getContext(calledFunctionName: string): SetupContext {
   const i = getCurrentInstance()!
   if (__DEV__ && !i) {
-    warn(`useContext() called without active instance.`)
+    warn(`${calledFunctionName}() called without active instance.`)
   }
   return i.setupContext || (i.setupContext = createSetupContext(i))
 }

packages/runtime-core/src/compat/global.ts

@@ -536,7 +536,7 @@ function installCompatMount(
         if (__DEV__) {
           for (let i = 0; i < container.attributes.length; i++) {
             const attr = container.attributes[i]
-            if (attr.name !== 'v-cloak' && /^(v-|:|@)/.test(attr.name)) {
+            if (attr.name !== 'v-cloak' && /^(?:v-|:|@)/.test(attr.name)) {
               warnDeprecation(DeprecationTypes.GLOBAL_MOUNT_CONTAINER, null)
               break
             }

packages/runtime-core/src/compat/instance.ts

@@ -33,7 +33,7 @@ import {
   legacyPrependModifier,
   legacyRenderSlot,
   legacyRenderStatic,
-  legacyresolveScopedSlots,
+  legacyResolveScopedSlots,
 } from './renderHelpers'
 import { resolveFilter } from '../helpers/resolveAssets'
 import type { Slots } from '../componentSlots'
@@ -183,7 +183,7 @@ export function installCompatInstanceProperties(
     _b: () => legacyBindObjectProps,
     _v: () => createTextVNode,
     _e: () => createCommentVNode,
-    _u: () => legacyresolveScopedSlots,
+    _u: () => legacyResolveScopedSlots,
     _g: () => legacyBindObjectListeners,
     _d: () => legacyBindDynamicKeys,
     _p: () => legacyPrependModifier,

packages/runtime-core/src/compat/renderHelpers.ts

@@ -87,7 +87,7 @@ type LegacyScopedSlotsData = Array<
   | LegacyScopedSlotsData
 >
 
-export function legacyresolveScopedSlots(
+export function legacyResolveScopedSlots(
   fns: LegacyScopedSlotsData,
   raw?: Record<string, Slot>,
   // the following are added in 2.6

packages/runtime-core/src/component.ts

@@ -585,13 +585,13 @@ export interface ComponentInternalInstance {
    * For updating css vars on contained teleports
    * @internal
    */
-  ut?: (vars?: Record<string, string>) => void
+  ut?: (vars?: Record<string, unknown>) => void
 
   /**
    * dev only. For style v-bind hydration mismatch checks
    * @internal
    */
-  getCssVars?: () => Record<string, string>
+  getCssVars?: () => Record<string, unknown>
 
   /**
    * v2 compat only, for caching mutated $options
@@ -1203,7 +1203,7 @@ export function getComponentPublicInstance(
   }
 }
 
-const classifyRE = /(?:^|[-_])(\w)/g
+const classifyRE = /(?:^|[-_])\w/g
 const classify = (str: string): string =>
   str.replace(classifyRE, c => c.toUpperCase()).replace(/[-_]/g, '')
 

packages/runtime-core/src/componentEmits.ts

@@ -151,10 +151,14 @@ export function emit(
   }
 
   let args = rawArgs
-  const isModelListener = event.startsWith('update:')
+  const isCompatModelListener =
+    __COMPAT__ && compatModelEventPrefix + event in props
+  const isModelListener = isCompatModelListener || event.startsWith('update:')
+  const modifiers = isCompatModelListener
+    ? props.modelModifiers
+    : isModelListener && getModelModifiers(props, event.slice(7))
 
   // for v-model update:xxx events, apply modifiers on args
-  const modifiers = isModelListener && getModelModifiers(props, event.slice(7))
   if (modifiers) {
     if (modifiers.trim) {
       args = rawArgs.map(a => (isString(a) ? a.trim() : a))
@@ -228,12 +232,14 @@ export function emit(
   }
 }
 
+const mixinEmitsCache = new WeakMap<ConcreteComponent, ObjectEmitsOptions>()
 export function normalizeEmitsOptions(
   comp: ConcreteComponent,
   appContext: AppContext,
   asMixin = false,
 ): ObjectEmitsOptions | null {
-  const cache = appContext.emitsCache
+  const cache =
+    __FEATURE_OPTIONS_API__ && asMixin ? mixinEmitsCache : appContext.emitsCache
   const cached = cache.get(comp)
   if (cached !== undefined) {
     return cached

packages/runtime-core/src/componentOptions.ts

@@ -756,6 +756,7 @@ export function applyOptions(instance: ComponentInternalInstance): void {
         Object.defineProperty(exposed, key, {
           get: () => publicThis[key],
           set: val => (publicThis[key] = val),
+          enumerable: true,
         })
       })
     } else if (!instance.exposed) {

packages/runtime-core/src/componentPublicInstance.ts

@@ -575,19 +575,20 @@ export const PublicInstanceProxyHandlers: ProxyHandler<any> = {
 
   has(
     {
-      _: { data, setupState, accessCache, ctx, appContext, propsOptions },
+      _: { data, setupState, accessCache, ctx, appContext, propsOptions, type },
     }: ComponentRenderContext,
     key: string,
   ) {
-    let normalizedProps
+    let normalizedProps, cssModules
-    return (
+    return !!(
-      !!accessCache![key] ||
+      accessCache![key] ||
-      (data !== EMPTY_OBJ && hasOwn(data, key)) ||
+      (data !== EMPTY_OBJ && key[0] !== '$' && hasOwn(data, key)) ||
       hasSetupBinding(setupState, key) ||
       ((normalizedProps = propsOptions[0]) && hasOwn(normalizedProps, key)) ||
       hasOwn(ctx, key) ||
       hasOwn(publicPropertiesMap, key) ||
-      hasOwn(appContext.config.globalProperties, key)
+      hasOwn(appContext.config.globalProperties, key) ||
+      ((cssModules = type.__cssModules) && cssModules[key])
     )
   },
 

packages/runtime-core/src/componentSlots.ts

@@ -79,14 +79,10 @@ export type RawSlots = {
    * @internal
    */
   _?: SlotFlags
-  /**
-   * cache indexes for slot content
-   * @internal
-   */
-  __?: number[]
 }
 
-const isInternalKey = (key: string) => key[0] === '_' || key === '$stable'
+const isInternalKey = (key: string) =>
+  key === '_' || key === '_ctx' || key === '$stable'
 
 const normalizeSlotValue = (value: unknown): VNode[] =>
   isArray(value)

packages/runtime-core/src/components/BaseTransition.ts

@@ -24,7 +24,7 @@ import { SchedulerJobFlags } from '../scheduler'
 
 type Hook<T = () => void> = T | T[]
 
-const leaveCbKey: unique symbol = Symbol('_leaveCb')
+export const leaveCbKey: unique symbol = Symbol('_leaveCb')
 const enterCbKey: unique symbol = Symbol('_enterCb')
 
 export interface BaseTransitionProps<HostElement = RendererElement> {
@@ -204,7 +204,7 @@ const BaseTransitionImpl: ComponentOptions = {
       if (
         oldInnerChild &&
         oldInnerChild.type !== Comment &&
-        !isSameVNodeType(innerChild, oldInnerChild) &&
+        !isSameVNodeType(oldInnerChild, innerChild) &&
         recursiveGetSubtree(instance).type !== Comment
       ) {
         let leavingHooks = resolveTransitionHooks(

packages/runtime-core/src/components/Suspense.ts

@@ -235,7 +235,7 @@ function patchSuspense(
   const { activeBranch, pendingBranch, isInFallback, isHydrating } = suspense
   if (pendingBranch) {
     suspense.pendingBranch = newBranch
-    if (isSameVNodeType(newBranch, pendingBranch)) {
+    if (isSameVNodeType(pendingBranch, newBranch)) {
       // same root type but content may have changed.
       patch(
         pendingBranch,
@@ -321,7 +321,7 @@ function patchSuspense(
           )
           setActiveBranch(suspense, newFallback)
         }
-      } else if (activeBranch && isSameVNodeType(newBranch, activeBranch)) {
+      } else if (activeBranch && isSameVNodeType(activeBranch, newBranch)) {
         // toggled "back" to current active branch
         patch(
           activeBranch,
@@ -355,7 +355,7 @@ function patchSuspense(
       }
     }
   } else {
-    if (activeBranch && isSameVNodeType(newBranch, activeBranch)) {
+    if (activeBranch && isSameVNodeType(activeBranch, newBranch)) {
       // root did not change, just normal patch
       patch(
         activeBranch,

packages/runtime-core/src/components/Teleport.ts

@@ -406,29 +406,43 @@ function hydrateTeleport(
     optimized: boolean,
   ) => Node | null,
 ): Node | null {
+  function hydrateDisabledTeleport(
+    node: Node,
+    vnode: VNode,
+    targetStart: Node | null,
+    targetAnchor: Node | null,
+  ) {
+    vnode.anchor = hydrateChildren(
+      nextSibling(node),
+      vnode,
+      parentNode(node)!,
+      parentComponent,
+      parentSuspense,
+      slotScopeIds,
+      optimized,
+    )
+    vnode.targetStart = targetStart
+    vnode.targetAnchor = targetAnchor
+  }
+
   const target = (vnode.target = resolveTarget<Element>(
     vnode.props,
     querySelector,
   ))
+  const disabled = isTeleportDisabled(vnode.props)
   if (target) {
-    const disabled = isTeleportDisabled(vnode.props)
     // if multiple teleports rendered to the same target element, we need to
     // pick up from where the last teleport finished instead of the first node
     const targetNode =
       (target as TeleportTargetElement)._lpa || target.firstChild
     if (vnode.shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
       if (disabled) {
-        vnode.anchor = hydrateChildren(
+        hydrateDisabledTeleport(
-          nextSibling(node),
+          node,
           vnode,
-          parentNode(node)!,
+          targetNode,
-          parentComponent,
+          targetNode && nextSibling(targetNode),
-          parentSuspense,
-          slotScopeIds,
-          optimized,
         )
-        vnode.targetStart = targetNode
-        vnode.targetAnchor = targetNode && nextSibling(targetNode)
       } else {
         vnode.anchor = nextSibling(node)
 
@@ -470,6 +484,10 @@ function hydrateTeleport(
       }
     }
     updateCssVars(vnode, disabled)
+  } else if (disabled) {
+    if (vnode.shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
+      hydrateDisabledTeleport(node, vnode, node, nextSibling(node))
+    }
   }
   return vnode.anchor && nextSibling(vnode.anchor as Node)
 }

packages/runtime-core/src/devtools.ts

@@ -125,7 +125,7 @@ export const devtoolsComponentRemoved = (
 
 type DevtoolsComponentHook = (component: ComponentInternalInstance) => void
 
-/*! #__NO_SIDE_EFFECTS__ */
+/*@__NO_SIDE_EFFECTS__*/
 function createDevtoolsComponentHook(
   hook: DevtoolsHooks,
 ): DevtoolsComponentHook {

packages/runtime-core/src/h.ts

@@ -7,6 +7,7 @@ import {
   type VNodeProps,
   createVNode,
   isVNode,
+  setBlockTracking,
 } from './vnode'
 import type { Teleport, TeleportProps } from './components/Teleport'
 import type { Suspense, SuspenseProps } from './components/Suspense'
@@ -201,25 +202,31 @@ export function h<P>(
 
 // Actual implementation
 export function h(type: any, propsOrChildren?: any, children?: any): VNode {
-  const l = arguments.length
+  try {
-  if (l === 2) {
+    // #6913 disable tracking block in h function
-    if (isObject(propsOrChildren) && !isArray(propsOrChildren)) {
+    setBlockTracking(-1)
-      // single vnode without props
+    const l = arguments.length
-      if (isVNode(propsOrChildren)) {
+    if (l === 2) {
-        return createVNode(type, null, [propsOrChildren])
+      if (isObject(propsOrChildren) && !isArray(propsOrChildren)) {
+        // single vnode without props
+        if (isVNode(propsOrChildren)) {
+          return createVNode(type, null, [propsOrChildren])
+        }
+        // props without children
+        return createVNode(type, propsOrChildren)
+      } else {
+        // omit props
+        return createVNode(type, null, propsOrChildren)
       }
-      // props without children
-      return createVNode(type, propsOrChildren)
     } else {
-      // omit props
+      if (l > 3) {
-      return createVNode(type, null, propsOrChildren)
+        children = Array.prototype.slice.call(arguments, 2)
+      } else if (l === 3 && isVNode(children)) {
+        children = [children]
+      }
+      return createVNode(type, propsOrChildren, children)
     }
-  } else {
+  } finally {
-    if (l > 3) {
+    setBlockTracking(1)
-      children = Array.prototype.slice.call(arguments, 2)
-    } else if (l === 3 && isVNode(children)) {
-      children = [children]
-    }
-    return createVNode(type, propsOrChildren, children)
   }
 }

packages/runtime-core/src/hmr.ts

@@ -7,7 +7,7 @@ import {
   type InternalRenderFunction,
   isClassComponent,
 } from './component'
-import { queueJob, queuePostFlushCb } from './scheduler'
+import { SchedulerJobFlags, queueJob, queuePostFlushCb } from './scheduler'
 import { extend, getGlobalThis } from '@vue/shared'
 
 type HMRComponent = ComponentOptions | ClassComponent
@@ -31,11 +31,17 @@ export interface HMRRuntime {
 // Note: for a component to be eligible for HMR it also needs the __hmrId option
 // to be set so that its instances can be registered / removed.
 if (__DEV__) {
-  getGlobalThis().__VUE_HMR_RUNTIME__ = {
+  const g = getGlobalThis()
-    createRecord: tryWrap(createRecord),
+  // vite-plugin-vue/issues/644, #13202
-    rerender: tryWrap(rerender),
+  // custom-element libraries bundle Vue to simplify usage outside Vue projects but
-    reload: tryWrap(reload),
+  // it overwrite __VUE_HMR_RUNTIME__, causing HMR to break.
-  } as HMRRuntime
+  if (!g.__VUE_HMR_RUNTIME__) {
+    g.__VUE_HMR_RUNTIME__ = {
+      createRecord: tryWrap(createRecord),
+      rerender: tryWrap(rerender),
+      reload: tryWrap(reload),
+    } as HMRRuntime
+  }
 }
 
 const map: Map<
@@ -96,7 +102,10 @@ function rerender(id: string, newRender?: Function): void {
     instance.renderCache = []
     // this flag forces child components with slot content to update
     isHmrUpdating = true
-    instance.update()
+    // #13771 don't update if the job is already disposed
+    if (!(instance.job.flags! & SchedulerJobFlags.DISPOSED)) {
+      instance.update()
+    }
     isHmrUpdating = false
   })
 }
@@ -144,11 +153,15 @@ function reload(id: string, newComp: HMRComponent): void {
       // components to be unmounted and re-mounted. Queue the update so that we
       // don't end up forcing the same parent to re-render multiple times.
       queueJob(() => {
-        isHmrUpdating = true
+        // vite-plugin-vue/issues/599
-        instance.parent!.update()
+        // don't update if the job is already disposed
-        isHmrUpdating = false
+        if (!(instance.job.flags! & SchedulerJobFlags.DISPOSED)) {
-        // #6930, #11248 avoid infinite recursion
+          isHmrUpdating = true
-        dirtyInstances.delete(instance)
+          instance.parent!.update()
+          isHmrUpdating = false
+          // #6930, #11248 avoid infinite recursion
+          dirtyInstances.delete(instance)
+        }
       })
     } else if (instance.appContext.reload) {
       // root instance mounted via createApp() has a reload method

packages/runtime-core/src/hydration.ts

@@ -28,6 +28,7 @@ import {
   isReservedProp,
   isString,
   normalizeClass,
+  normalizeCssVarValue,
   normalizeStyle,
   stringifyStyle,
 } from '@vue/shared'
@@ -945,10 +946,8 @@ function resolveCssVars(
   ) {
     const cssVars = instance.getCssVars()
     for (const key in cssVars) {
-      expectedMap.set(
+      const value = normalizeCssVarValue(cssVars[key])
-        `--${getEscapedCssVarName(key, false)}`,
+      expectedMap.set(`--${getEscapedCssVarName(key, false)}`, value)
-        String(cssVars[key]),
-      )
     }
   }
   if (vnode === root && instance.parent) {

packages/runtime-core/src/profiling.ts

@@ -28,12 +28,10 @@ export function endMeasure(
   if (instance.appContext.config.performance && isSupported()) {
     const startTag = `vue-${type}-${instance.uid}`
     const endTag = startTag + `:end`
+    const measureName = `<${formatComponentName(instance, instance.type)}> ${type}`
     perf.mark(endTag)
-    perf.measure(
+    perf.measure(measureName, startTag, endTag)
-      `<${formatComponentName(instance, instance.type)}> ${type}`,
+    perf.clearMeasures(measureName)
-      startTag,
-      endTag,
-    )
     perf.clearMarks(startTag)
     perf.clearMarks(endTag)
   }

packages/runtime-core/src/renderer.ts

@@ -85,7 +85,7 @@ import { initFeatureFlags } from './featureFlags'
 import { isAsyncWrapper } from './apiAsyncComponent'
 import { isCompatEnabled } from './compat/compatConfig'
 import { DeprecationTypes } from './compat/compatConfig'
-import type { TransitionHooks } from './components/BaseTransition'
+import { type TransitionHooks, leaveCbKey } from './components/BaseTransition'
 import type { VueElement } from '@vue/runtime-dom'
 
 export interface Renderer<HostElement = RendererElement> {
@@ -1226,6 +1226,7 @@ function baseCreateRenderer(
       if (!initialVNode.el) {
         const placeholder = (instance.subTree = createVNode(Comment))
         processCommentNode(null, placeholder, container!, anchor)
+        initialVNode.placeholder = placeholder.el
       }
     } else {
       setupRenderEffect(
@@ -1979,8 +1980,12 @@ function baseCreateRenderer(
       for (i = toBePatched - 1; i >= 0; i--) {
         const nextIndex = s2 + i
         const nextChild = c2[nextIndex] as VNode
+        const anchorVNode = c2[nextIndex + 1] as VNode
         const anchor =
-          nextIndex + 1 < l2 ? (c2[nextIndex + 1] as VNode).el : parentAnchor
+          nextIndex + 1 < l2
+            ? // #13559, fallback to el placeholder for unresolved async component
+              anchorVNode.el || anchorVNode.placeholder
+            : parentAnchor
         if (newIndexToOldIndexMap[i] === 0) {
           // mount new
           patch(
@@ -2065,6 +2070,12 @@ function baseCreateRenderer(
           }
         }
         const performLeave = () => {
+          // #13153 move kept-alive node before v-show transition leave finishes
+          // it needs to call the leaving callback to ensure element's `display`
+          // is `none`
+          if (el!._isLeaving) {
+            el![leaveCbKey](true /* cancelled */)
+          }
           leave(el!, () => {
             remove()
             afterLeave && afterLeave()
@@ -2272,17 +2283,7 @@ function baseCreateRenderer(
       unregisterHMR(instance)
     }
 
-    const {
+    const { bum, scope, job, subTree, um, m, a } = instance
-      bum,
-      scope,
-      job,
-      subTree,
-      um,
-      m,
-      a,
-      parent,
-      slots: { __: slotCacheKeys },
-    } = instance
     invalidateMount(m)
     invalidateMount(a)
 
@@ -2291,13 +2292,6 @@ function baseCreateRenderer(
       invokeArrayFns(bum)
     }
 
-    // remove slots content from parent renderCache
-    if (parent && isArray(slotCacheKeys)) {
-      slotCacheKeys.forEach(v => {
-        parent.renderCache[v] = undefined
-      })
-    }
-
     if (
       __COMPAT__ &&
       isCompatEnabled(DeprecationTypes.INSTANCE_EVENT_HOOKS, instance)
@@ -2332,24 +2326,6 @@ function baseCreateRenderer(
       instance.isUnmounted = true
     }, parentSuspense)
 
-    // A component with async dep inside a pending suspense is unmounted before
-    // its async dep resolves. This should remove the dep from the suspense, and
-    // cause the suspense to resolve immediately if that was the last dep.
-    if (
-      __FEATURE_SUSPENSE__ &&
-      parentSuspense &&
-      parentSuspense.pendingBranch &&
-      !parentSuspense.isUnmounted &&
-      instance.asyncDep &&
-      !instance.asyncResolved &&
-      instance.suspenseId === parentSuspense.pendingId
-    ) {
-      parentSuspense.deps--
-      if (parentSuspense.deps === 0) {
-        parentSuspense.resolve()
-      }
-    }
-
     if (__DEV__ || __FEATURE_PROD_DEVTOOLS__) {
       devtoolsComponentRemoved(instance)
     }
@@ -2508,7 +2484,11 @@ export function traverseStaticChildren(
           traverseStaticChildren(c1, c2)
       }
       // #6852 also inherit for text nodes
-      if (c2.type === Text) {
+      if (
+        c2.type === Text &&
+        // avoid cached text nodes retaining detached dom nodes
+        c2.patchFlag !== PatchFlags.CACHED
+      ) {
         c2.el = c1.el
       }
       // #2324 also inherit for comment nodes, but not placeholders (e.g. v-if which

packages/runtime-core/src/rendererTemplateRef.ts

@@ -1,7 +1,13 @@
 import type { SuspenseBoundary } from './components/Suspense'
-import type { VNode, VNodeNormalizedRef, VNodeNormalizedRefAtom } from './vnode'
+import type {
+  VNode,
+  VNodeNormalizedRef,
+  VNodeNormalizedRefAtom,
+  VNodeRef,
+} from './vnode'
 import {
   EMPTY_OBJ,
+  NO,
   ShapeFlags,
   hasOwn,
   isArray,
@@ -13,11 +19,12 @@ import { isAsyncWrapper } from './apiAsyncComponent'
 import { warn } from './warning'
 import { isRef, toRaw } from '@vue/reactivity'
 import { ErrorCodes, callWithErrorHandling } from './errorHandling'
-import type { SchedulerJob } from './scheduler'
+import { type SchedulerJob, SchedulerJobFlags } from './scheduler'
 import { queuePostRenderEffect } from './renderer'
 import { type ComponentOptions, getComponentPublicInstance } from './component'
 import { knownTemplateRefs } from './helpers/useTemplateRef'
 
+const pendingSetRefMap = new WeakMap<VNodeNormalizedRef, SchedulerJob>()
 /**
  * Function for handling a template ref
  */
@@ -77,7 +84,7 @@ export function setRef(
   const rawSetupState = toRaw(setupState)
   const canSetSetupRef =
     setupState === EMPTY_OBJ
-      ? () => false
+      ? NO
       : (key: string) => {
           if (__DEV__) {
             if (hasOwn(rawSetupState, key) && !isRef(rawSetupState[key])) {
@@ -94,15 +101,26 @@ export function setRef(
           return hasOwn(rawSetupState, key)
         }
 
+  const canSetRef = (ref: VNodeRef) => {
+    return !__DEV__ || !knownTemplateRefs.has(ref as any)
+  }
+
   // dynamic ref changed. unset old ref
   if (oldRef != null && oldRef !== ref) {
+    invalidatePendingSetRef(oldRawRef!)
     if (isString(oldRef)) {
       refs[oldRef] = null
       if (canSetSetupRef(oldRef)) {
         setupState[oldRef] = null
       }
     } else if (isRef(oldRef)) {
-      oldRef.value = null
+      if (canSetRef(oldRef)) {
+        oldRef.value = null
+      }
+
+      // this type assertion is valid since `oldRef` has already been asserted to be non-null
+      const oldRawRefAtom = oldRawRef as VNodeNormalizedRefAtom
+      if (oldRawRefAtom.k) refs[oldRawRefAtom.k] = null
     }
   }
 
@@ -119,7 +137,9 @@ export function setRef(
             ? canSetSetupRef(ref)
               ? setupState[ref]
               : refs[ref]
-            : ref.value
+            : canSetRef(ref) || !rawRef.k
+              ? ref.value
+              : refs[rawRef.k]
           if (isUnmount) {
             isArray(existing) && remove(existing, refValue)
           } else {
@@ -130,8 +150,11 @@ export function setRef(
                   setupState[ref] = refs[ref]
                 }
               } else {
-                ref.value = [refValue]
+                const newVal = [refValue]
-                if (rawRef.k) refs[rawRef.k] = ref.value
+                if (canSetRef(ref)) {
+                  ref.value = newVal
+                }
+                if (rawRef.k) refs[rawRef.k] = newVal
               }
             } else if (!existing.includes(refValue)) {
               existing.push(refValue)
@@ -143,7 +166,9 @@ export function setRef(
             setupState[ref] = value
           }
         } else if (_isRef) {
-          ref.value = value
+          if (canSetRef(ref)) {
+            ref.value = value
+          }
           if (rawRef.k) refs[rawRef.k] = value
         } else if (__DEV__) {
           warn('Invalid template ref type:', ref, `(${typeof ref})`)
@@ -153,9 +178,15 @@ export function setRef(
         // #1789: for non-null values, set them after render
         // null values means this is unmount and it should not overwrite another
         // ref with the same key
-        ;(doSet as SchedulerJob).id = -1
+        const job: SchedulerJob = () => {
-        queuePostRenderEffect(doSet, parentSuspense)
+          doSet()
+          pendingSetRefMap.delete(rawRef)
+        }
+        job.id = -1
+        pendingSetRefMap.set(rawRef, job)
+        queuePostRenderEffect(job, parentSuspense)
       } else {
+        invalidatePendingSetRef(rawRef)
         doSet()
       }
     } else if (__DEV__) {
@@ -163,3 +194,11 @@ export function setRef(
     }
   }
 }
+
+function invalidatePendingSetRef(rawRef: VNodeNormalizedRef) {
+  const pendingSetRef = pendingSetRefMap.get(rawRef)
+  if (pendingSetRef) {
+    pendingSetRef.flags! |= SchedulerJobFlags.DISPOSED
+    pendingSetRefMap.delete(rawRef)
+  }
+}

packages/runtime-core/src/scheduler.ts

@@ -53,10 +53,15 @@ let currentFlushPromise: Promise<void> | null = null
 const RECURSION_LIMIT = 100
 type CountMap = Map<SchedulerJob, number>
 
-export function nextTick<T = void, R = void>(
+export function nextTick(): Promise<void>
+export function nextTick<T, R>(
   this: T,
-  fn?: (this: T) => R,
+  fn: (this: T) => R | Promise<R>,
-): Promise<Awaited<R>> {
+): Promise<R>
+export function nextTick<T, R>(
+  this: T,
+  fn?: (this: T) => R | Promise<R>,
+): Promise<void | R> {
   const p = currentFlushPromise || resolvedPromise
   return fn ? p.then(this ? fn.bind(this) : fn) : p
 }

packages/runtime-core/src/vnode.ts

@@ -196,6 +196,7 @@ export interface VNode<
 
   // DOM
   el: HostNode | null
+  placeholder: HostNode | null // async component el placeholder
   anchor: HostNode | null // fragment anchor
   target: HostElement | null // teleport target
   targetStart: HostNode | null // teleport target start anchor
@@ -711,6 +712,8 @@ export function cloneVNode<T, U>(
     suspense: vnode.suspense,
     ssContent: vnode.ssContent && cloneVNode(vnode.ssContent),
     ssFallback: vnode.ssFallback && cloneVNode(vnode.ssFallback),
+    placeholder: vnode.placeholder,
+
     el: vnode.el,
     anchor: vnode.anchor,
     ctx: vnode.ctx,