chore: Merge branch 'vapor' into edison/feat/fowardedSlots

CHANGELOG.md

@@ -1,3 +1,41 @@
+## [3.5.14](https://github.com/vuejs/core/compare/v3.5.13...v3.5.14) (2025-05-15)
+
+
+### Bug Fixes
+
+* **compat:** correct deprecation message for v-bind.sync usage ([#13137](https://github.com/vuejs/core/issues/13137)) ([466b30f](https://github.com/vuejs/core/commit/466b30f4049ec89fb282624ec17d1a93472ab93f)), closes [#13133](https://github.com/vuejs/core/issues/13133)
+* **compiler-core:** remove slot cache from parent renderCache during unmounting ([#13215](https://github.com/vuejs/core/issues/13215)) ([5d166f3](https://github.com/vuejs/core/commit/5d166f3796a03a497435fc079c6a83a4e9c6cf52))
+* **compiler-sfc:** fix scope handling for props destructure in function parameters and catch clauses ([8e34357](https://github.com/vuejs/core/commit/8e3435779a667de485cf9efd78667d0ca14c5f84)), closes [#12790](https://github.com/vuejs/core/issues/12790)
+* **compiler-sfc:** treat the return value of `useTemplateRef` as a definite ref ([#13197](https://github.com/vuejs/core/issues/13197)) ([8ae1122](https://github.com/vuejs/core/commit/8ae11226e8ee938615e17c7b81dc38ae3f7cefb9))
+* **compiler:** fix spelling error in domTagConfig ([#13043](https://github.com/vuejs/core/issues/13043)) ([388295b](https://github.com/vuejs/core/commit/388295b27f3cc69eba25d325bbe60a36a3df831a))
+* **customFormatter:** properly accessing ref value during debugger ([#12948](https://github.com/vuejs/core/issues/12948)) ([fdbd026](https://github.com/vuejs/core/commit/fdbd02658301dd794fe0c84f0018d080a07fca9f))
+* **hmr/teleport:** adjust static children traversal for HMR in dev mode ([#12819](https://github.com/vuejs/core/issues/12819)) ([5e37dd0](https://github.com/vuejs/core/commit/5e37dd009562bcd8080a200c32abde2d6e4f0305)), closes [#12816](https://github.com/vuejs/core/issues/12816)
+* **hmr:** avoid hydration for hmr root reload ([#12450](https://github.com/vuejs/core/issues/12450)) ([1f98a9c](https://github.com/vuejs/core/commit/1f98a9c493d01c21befa90107f0593bc92a58932)), closes [vitejs/vite-plugin-vue#146](https://github.com/vitejs/vite-plugin-vue/issues/146) [vitejs/vite-plugin-vue#477](https://github.com/vitejs/vite-plugin-vue/issues/477)
+* **hmr:** avoid hydration for hmr updating ([#12262](https://github.com/vuejs/core/issues/12262)) ([9c4dbbc](https://github.com/vuejs/core/commit/9c4dbbc5185125835ad3e49baba303bd54676111)), closes [#7706](https://github.com/vuejs/core/issues/7706) [#8170](https://github.com/vuejs/core/issues/8170)
+* **reactivity:** ensure markRaw objects are not reactive ([#12824](https://github.com/vuejs/core/issues/12824)) ([295b5ec](https://github.com/vuejs/core/commit/295b5ec19b6a52c4a56652cc4d6e93a4ea7c14ed)), closes [#12807](https://github.com/vuejs/core/issues/12807)
+* **reactivity:** ensure multiple effectScope on() and off() calls maintains correct active scope ([22dcbf3](https://github.com/vuejs/core/commit/22dcbf3e20eb84f69c8952f6f70d9990136a4a68)), closes [#12631](https://github.com/vuejs/core/issues/12631) [#12632](https://github.com/vuejs/core/issues/12632) [#12641](https://github.com/vuejs/core/issues/12641)
+* **reactivity:** should not recompute if computed does not track reactive data ([#12341](https://github.com/vuejs/core/issues/12341)) ([0b23fd2](https://github.com/vuejs/core/commit/0b23fd23833cf085e7e112bf4435cfc9b360d072)), closes [#12337](https://github.com/vuejs/core/issues/12337)
+* **runtime-core:**  stop tracking deps in setRef during unmount ([#13210](https://github.com/vuejs/core/issues/13210)) ([016c472](https://github.com/vuejs/core/commit/016c472bd2e7604b21c69dee1da8545ce26e4d2f))
+* **runtime-core:**  update __vnode of static nodes when patching along the optimized path ([#13223](https://github.com/vuejs/core/issues/13223)) ([b3ecee3](https://github.com/vuejs/core/commit/b3ecee3da8ed5c55dea89ce6b4b376b2b722b018))
+* **runtime-core:** inherit comment nodes during block patch in production build  ([#10748](https://github.com/vuejs/core/issues/10748)) ([6264505](https://github.com/vuejs/core/commit/626450590d81f79117b34d2a73073b1dc8f551bd)), closes [#10747](https://github.com/vuejs/core/issues/10747) [#12650](https://github.com/vuejs/core/issues/12650)
+* **runtime-core:** prevent unmounted vnode from being inserted during transition leave ([#12862](https://github.com/vuejs/core/issues/12862)) ([d6a6ec1](https://github.com/vuejs/core/commit/d6a6ec13ce521683bfb2a22932778ef7b51f8600)), closes [#12860](https://github.com/vuejs/core/issues/12860)
+* **runtime-core:** respect immutability for readonly reactive arrays in `v-for` ([#13091](https://github.com/vuejs/core/issues/13091)) ([3f27c58](https://github.com/vuejs/core/commit/3f27c58ffbd4309df369bc89493fdc284dc540bb)), closes [#13087](https://github.com/vuejs/core/issues/13087)
+* **runtime-dom:** always treat autocorrect as attribute ([#13001](https://github.com/vuejs/core/issues/13001)) ([1499135](https://github.com/vuejs/core/commit/1499135c227236e037bb746beeb777941b0b58ff)), closes [#5705](https://github.com/vuejs/core/issues/5705)
+* **slots:** properly warn if slot invoked in setup ([#12195](https://github.com/vuejs/core/issues/12195)) ([9196222](https://github.com/vuejs/core/commit/9196222ae1d63b52b35ac5fbf5e71494587ccf05)), closes [#12194](https://github.com/vuejs/core/issues/12194)
+* **ssr:** properly init slots during ssr rendering ([#12441](https://github.com/vuejs/core/issues/12441)) ([2206cd2](https://github.com/vuejs/core/commit/2206cd235a1627c540e795e378b7564a55b47313)), closes [#12438](https://github.com/vuejs/core/issues/12438)
+* **transition:** fix KeepAlive with transition out-in mode behavior in production ([#12468](https://github.com/vuejs/core/issues/12468)) ([343c891](https://github.com/vuejs/core/commit/343c89122448719bd6ed6bd9de986dfb2721d6bf)), closes [#12465](https://github.com/vuejs/core/issues/12465)
+* **TransitionGroup:** reset prevChildren to prevent memory leak ([#13183](https://github.com/vuejs/core/issues/13183)) ([8b848cb](https://github.com/vuejs/core/commit/8b848cbbd2af337d23e19e202f9ab433f8580855)), closes [#13181](https://github.com/vuejs/core/issues/13181)
+* **types:** allow return any for Options API lifecycle hooks ([#5914](https://github.com/vuejs/core/issues/5914)) ([06310e8](https://github.com/vuejs/core/commit/06310e82f5bed62d1b9733dcb18cd8d6edc988de))
+* **types:** the directive's modifiers should be optional ([#12605](https://github.com/vuejs/core/issues/12605)) ([10e54dc](https://github.com/vuejs/core/commit/10e54dcc86a7967f3196d96200bcbd1d3d42082f))
+* **typos:** fix comments referencing transformElement.ts ([#12551](https://github.com/vuejs/core/issues/12551))[ci-skip] ([11c053a](https://github.com/vuejs/core/commit/11c053a5429ad0d27a0e2c78b6b026ea00ace116))
+
+
+### Features
+
+* **types:** add type TemplateRef ([#12645](https://github.com/vuejs/core/issues/12645)) ([636a861](https://github.com/vuejs/core/commit/636a8619f06c71dfd79f7f6412fd130c4f84226f))
+
+
+
 ## [3.5.13](https://github.com/vuejs/core/compare/v3.5.12...v3.5.13) (2024-11-15)
 
 
@@ -8,7 +46,7 @@
 * **custom-element:** avoid triggering mutationObserver when relecting props ([352bc88](https://github.com/vuejs/core/commit/352bc88c1bd2fda09c61ab17ea1a5967ffcd7bc0)), closes [#12214](https://github.com/vuejs/core/issues/12214) [#12215](https://github.com/vuejs/core/issues/12215)
 * **deps:** update dependency postcss to ^8.4.48 ([#12356](https://github.com/vuejs/core/issues/12356)) ([b5ff930](https://github.com/vuejs/core/commit/b5ff930089985a58c3553977ef999cec2a6708a4))
 * **hydration:** the component vnode's el should be updated when a mismatch occurs. ([#12255](https://github.com/vuejs/core/issues/12255)) ([a20a4cb](https://github.com/vuejs/core/commit/a20a4cb36a3e717d1f8f259d0d59f133f508ff0a)), closes [#12253](https://github.com/vuejs/core/issues/12253)
-* **reactiivty:** avoid unnecessary watcher effect removal from inactive scope ([2193284](https://github.com/vuejs/core/commit/21932840eae72ffcd357a62ec596aaecc7ec224a)), closes [#5783](https://github.com/vuejs/core/issues/5783) [#5806](https://github.com/vuejs/core/issues/5806)
+* **reactivity:** avoid unnecessary watcher effect removal from inactive scope ([2193284](https://github.com/vuejs/core/commit/21932840eae72ffcd357a62ec596aaecc7ec224a)), closes [#5783](https://github.com/vuejs/core/issues/5783) [#5806](https://github.com/vuejs/core/issues/5806)
 * **reactivity:** release nested effects/scopes on effect scope stop ([#12373](https://github.com/vuejs/core/issues/12373)) ([bee2f5e](https://github.com/vuejs/core/commit/bee2f5ee62dc0cd04123b737779550726374dd0a)), closes [#12370](https://github.com/vuejs/core/issues/12370)
 * **runtime-dom:** set css vars before user onMounted hooks ([2d5c5e2](https://github.com/vuejs/core/commit/2d5c5e25e9b7a56e883674fb434135ac514429b5)), closes [#11533](https://github.com/vuejs/core/issues/11533)
 * **runtime-dom:** set css vars on update to handle child forcing reflow in onMount ([#11561](https://github.com/vuejs/core/issues/11561)) ([c4312f9](https://github.com/vuejs/core/commit/c4312f9c715c131a09e552ba46e9beb4b36d55e6))

README.md

@@ -35,6 +35,7 @@ Please make sure to respect issue requirements and use [the new issue helper](ht
 ## Stay In Touch
 
 - [X](https://x.com/vuejs)
+- [Bluesky](https://bsky.app/profile/vuejs.org)
 - [Blog](https://blog.vuejs.org/)
 - [Job Board](https://vuejobs.com/?ref=vuejs)
 

package.json

@@ -1,7 +1,7 @@
 {
   "private": true,
-  "version": "3.5.13",
+  "version": "3.5.14",
-  "packageManager": "pnpm@10.7.0",
+  "packageManager": "pnpm@10.9.0",
   "type": "module",
   "scripts": {
     "dev": "node scripts/dev.js",
@@ -69,24 +69,24 @@
     "@rollup/plugin-json": "^6.1.0",
     "@rollup/plugin-node-resolve": "^16.0.1",
     "@rollup/plugin-replace": "5.0.4",
-    "@swc/core": "^1.11.13",
+    "@swc/core": "^1.11.24",
     "@types/hash-sum": "^1.0.2",
-    "@types/node": "^22.13.14",
+    "@types/node": "^22.14.1",
     "@types/semver": "^7.7.0",
     "@types/serve-handler": "^6.1.4",
     "@vitest/ui": "^3.0.2",
-    "@vitest/coverage-v8": "^3.0.9",
+    "@vitest/coverage-v8": "^3.1.3",
-    "@vitest/eslint-plugin": "^1.1.38",
+    "@vitest/eslint-plugin": "^1.1.44",
     "@vue/consolidate": "1.0.0",
     "conventional-changelog-cli": "^5.0.0",
     "enquirer": "^2.4.1",
-    "esbuild": "^0.25.2",
+    "esbuild": "^0.25.4",
     "esbuild-plugin-polyfill-node": "^0.3.0",
-    "eslint": "^9.23.0",
+    "eslint": "^9.25.1",
-    "eslint-plugin-import-x": "^4.9.4",
+    "eslint-plugin-import-x": "^4.11.0",
     "estree-walker": "catalog:",
-    "jsdom": "^26.0.0",
+    "jsdom": "^26.1.0",
-    "lint-staged": "^15.5.0",
+    "lint-staged": "^15.5.1",
     "lodash": "^4.17.21",
     "magic-string": "^0.30.17",
     "markdown-table": "^3.0.4",
@@ -96,38 +96,21 @@
     "prettier": "^3.5.3",
     "pretty-bytes": "^6.1.1",
     "pug": "^3.0.3",
-    "puppeteer": "~24.4.0",
+    "puppeteer": "~24.8.2",
     "rimraf": "^6.0.1",
-    "rollup": "^4.38.0",
+    "rollup": "^4.40.2",
     "rollup-plugin-dts": "^6.2.1",
     "rollup-plugin-esbuild": "^6.2.1",
     "rollup-plugin-polyfill-node": "^0.13.0",
     "semver": "^7.7.1",
     "serve": "^14.2.4",
     "serve-handler": "^6.1.6",
-    "simple-git-hooks": "^2.12.1",
+    "simple-git-hooks": "^2.13.0",
     "todomvc-app-css": "^2.4.3",
     "tslib": "^2.8.1",
     "typescript": "~5.6.2",
-    "typescript-eslint": "^8.28.0",
+    "typescript-eslint": "^8.31.1",
     "vite": "catalog:",
-    "vitest": "^3.0.9"
+    "vitest": "^3.1.3"
-  },
-  "pnpm": {
-    "peerDependencyRules": {
-      "allowedVersions": {
-        "typescript-eslint>eslint": "^9.0.0",
-        "@typescript-eslint/eslint-plugin>eslint": "^9.0.0",
-        "@typescript-eslint/parser>eslint": "^9.0.0",
-        "@typescript-eslint/type-utils>eslint": "^9.0.0",
-        "@typescript-eslint/utils>eslint": "^9.0.0"
-      }
-    },
-    "onlyBuiltDependencies": [
-      "@swc/core",
-      "esbuild",
-      "puppeteer",
-      "simple-git-hooks"
-    ]
   }
 }

packages-private/local-playground/tsconfig.json

@@ -4,5 +4,5 @@
     "isolatedDeclarations": false,
     "allowJs": true
   },
-  "include": ["./**/*", "../packages/*/src"]
+  "include": ["./**/*", "../../packages/*/src"]
 }

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

@@ -11,7 +11,7 @@
     "vue": "latest"
   },
   "devDependencies": {
-    "@vitejs/plugin-vue": "^5.2.3",
+    "@vitejs/plugin-vue": "^5.2.4",
-    "vite": "^6.2.3"
+    "vite": "^6.3.5"
   }
 }

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

@@ -170,6 +170,11 @@ describe('compiler: cacheStatic transform', () => {
         {
           /* _ slot flag */
         },
+        {
+          type: NodeTypes.JS_PROPERTY,
+          key: { content: '__' },
+          value: { content: '[0]' },
+        },
       ],
     })
   })
@@ -197,6 +202,11 @@ describe('compiler: cacheStatic transform', () => {
         {
           /* _ slot flag */
         },
+        {
+          type: NodeTypes.JS_PROPERTY,
+          key: { content: '__' },
+          value: { content: '[0]' },
+        },
       ],
     })
   })

packages/compiler-core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/compiler-core",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "@vue/compiler-core",
   "main": "index.js",
   "module": "dist/compiler-core.esm-bundler.js",

packages/compiler-core/src/index.ts

@@ -17,6 +17,7 @@ export {
   createTransformContext,
   traverseNode,
   createStructuralDirectiveTransform,
+  getSelfName,
   type NodeTransform,
   type StructuralDirectiveTransform,
   type DirectiveTransform,

packages/compiler-core/src/transform.ts

@@ -123,6 +123,11 @@ export interface TransformContext
   filters?: Set<string>
 }
 
+export function getSelfName(filename: string): string | null {
+  const nameMatch = filename.replace(/\?.*$/, '').match(/([^/\\]+)\.\w+$/)
+  return nameMatch ? capitalize(camelize(nameMatch[1])) : null
+}
+
 export function createTransformContext(
   root: RootNode,
   {
@@ -150,11 +155,10 @@ export function createTransformContext(
     compatConfig,
   }: TransformOptions,
 ): TransformContext {
-  const nameMatch = filename.replace(/\?.*$/, '').match(/([^/\\]+)\.\w+$/)
   const context: TransformContext = {
     // options
     filename,
-    selfName: nameMatch && capitalize(camelize(nameMatch[1])),
+    selfName: getSelfName(filename),
     prefixIdentifiers,
     hoistStatic,
     hmr,

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

@@ -12,11 +12,14 @@ import {
   type RootNode,
   type SimpleExpressionNode,
   type SlotFunctionExpression,
+  type SlotsObjectProperty,
   type TemplateChildNode,
   type TemplateNode,
   type TextCallNode,
   type VNodeCall,
   createArrayExpression,
+  createObjectProperty,
+  createSimpleExpression,
   getVNodeBlockHelper,
   getVNodeHelper,
 } from '../ast'
@@ -140,6 +143,7 @@ function walk(
   }
 
   let cachedAsArray = false
+  const slotCacheKeys = []
   if (toCache.length === children.length && node.type === NodeTypes.ELEMENT) {
     if (
       node.tagType === ElementTypes.ELEMENT &&
@@ -163,6 +167,7 @@ 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[]),
         )
@@ -186,6 +191,7 @@ function walk(
         slotName.arg &&
         getSlotNode(parent.codegenNode, slotName.arg)
       if (slot) {
+        slotCacheKeys.push(context.cached.length)
         slot.returns = getCacheExpression(
           createArrayExpression(slot.returns as TemplateChildNode[]),
         )
@@ -196,10 +202,31 @@ 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

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

@@ -342,7 +342,6 @@ export function buildSlots(
     : hasForwardedSlots(node.children)
       ? SlotFlags.FORWARDED
       : SlotFlags.STABLE
-
   let slots = createObjectExpression(
     slotsProperties.concat(
       createObjectProperty(

packages/compiler-dom/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/compiler-dom",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "@vue/compiler-dom",
   "main": "index.js",
   "module": "dist/compiler-dom.esm-bundler.js",

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

@@ -196,6 +196,25 @@ return () => {}
 }"
 `;
 
+exports[`sfc reactive props destructure > handle function parameters with same name as destructured props 1`] = `
+"
+export default {
+  setup(__props) {
+
+    
+    function test(value) {
+      try {
+      } catch {
+      }
+    }
+    console.log(__props.value)
+    
+return () => {}
+}
+
+}"
+`;
+
 exports[`sfc reactive props destructure > multi-variable declaration 1`] = `
 "
 export default {

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

@@ -360,6 +360,22 @@ describe('sfc reactive props destructure', () => {
     expect(content).toMatch(`props: ['item'],`)
   })
 
+  test('handle function parameters with same name as destructured props', () => {
+    const { content } = compile(`
+    <script setup>
+    const { value } = defineProps()
+    function test(value) {
+      try {
+      } catch {
+      }
+    }
+    console.log(value)
+    </script>
+  `)
+    assertCode(content)
+    expect(content).toMatch(`console.log(__props.value)`)
+  })
+
   test('defineProps/defineEmits in multi-variable declaration (full removal)', () => {
     const { content } = compile(`
     <script setup>

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

@@ -214,7 +214,8 @@ color: red
       ".div[data-v-test] { color: red;
       }
       .div[data-v-test]:where(:hover) { color: blue;
-    }"`)
+      }"
+    `)
 
     expect(
       compileScoped(`.div { color: red; } .div:is(:hover) { color: blue; }`),
@@ -222,7 +223,8 @@ color: red
       ".div[data-v-test] { color: red;
       }
       .div[data-v-test]:is(:hover) { color: blue;
-    }"`)
+      }"
+    `)
 
     expect(
       compileScoped(
@@ -232,7 +234,8 @@ color: red
       ".div[data-v-test] { color: red;
       }
       .div[data-v-test]:where(.foo:hover) { color: blue;
-    }"`)
+      }"
+    `)
 
     expect(
       compileScoped(
@@ -242,7 +245,8 @@ color: red
       ".div[data-v-test] { color: red;
       }
       .div[data-v-test]:is(.foo:hover) { color: blue;
-    }"`)
+      }"
+    `)
   })
 
   test('media query', () => {

packages/compiler-sfc/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/compiler-sfc",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "@vue/compiler-sfc",
   "main": "dist/compiler-sfc.cjs.js",
   "module": "dist/compiler-sfc.esm-browser.js",
@@ -63,6 +63,6 @@
     "postcss-modules": "^6.0.1",
     "postcss-selector-parser": "^7.1.0",
     "pug": "^3.0.3",
-    "sass": "^1.86.0"
+    "sass": "^1.86.3"
   }
 }

packages/compiler-sfc/src/compileScript.ts

@@ -1120,6 +1120,7 @@ function walkDeclaration(
                 m === userImportAliases['shallowRef'] ||
                 m === userImportAliases['customRef'] ||
                 m === userImportAliases['toRef'] ||
+                m === userImportAliases['useTemplateRef'] ||
                 m === DEFINE_MODEL,
             )
           ) {

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

@@ -291,7 +291,8 @@ export function transformDestructuredProps(
       parent && parentStack.pop()
       if (
         (node.type === 'BlockStatement' && !isFunctionType(parent!)) ||
-        isFunctionType(node)
+        isFunctionType(node) ||
+        node.type === 'CatchClause'
       ) {
         popScope()
       }

packages/compiler-ssr/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/compiler-ssr",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "@vue/compiler-ssr",
   "main": "dist/compiler-ssr.cjs.js",
   "types": "dist/compiler-ssr.d.ts",

packages/compiler-vapor/__tests__/__snapshots__/compile.spec.ts.snap

@@ -149,7 +149,7 @@ export function render(_ctx, $props, $emit, $attrs, $slots) {
 `;
 
 exports[`compile > directives > v-pre > should not affect siblings after it 1`] = `
-"import { resolveComponent as _resolveComponent, setInsertionState as _setInsertionState, createComponentWithFallback as _createComponentWithFallback, child as _child, toDisplayString as _toDisplayString, setText as _setText, setProp as _setProp, renderEffect as _renderEffect, template as _template } from 'vue';
+"import { resolveComponent as _resolveComponent, setInsertionState as _setInsertionState, createComponentWithFallback as _createComponentWithFallback, child as _child, setProp as _setProp, toDisplayString as _toDisplayString, setText as _setText, renderEffect as _renderEffect, template as _template } from 'vue';
 const t0 = _template("<div :id=\\"foo\\"><Comp></Comp>{{ bar }}</div>")
 const t1 = _template("<div> </div>")
 
@@ -157,12 +157,12 @@ export function render(_ctx, $props, $emit, $attrs, $slots) {
   const _component_Comp = _resolveComponent("Comp")
   const n0 = t0()
   const n3 = t1()
+  const n2 = _child(n3)
   _setInsertionState(n3, 0)
   const n1 = _createComponentWithFallback(_component_Comp)
-  const n2 = _child(n3)
   _renderEffect(() => {
-    _setText(n2, _toDisplayString(_ctx.bar))
     _setProp(n3, "id", _ctx.foo)
+    _setText(n2, _toDisplayString(_ctx.bar))
   })
   return [n0, n3]
 }"
@@ -180,7 +180,7 @@ export function render(_ctx) {
 `;
 
 exports[`compile > dynamic root nodes and interpolation 1`] = `
-"import { child as _child, toDisplayString as _toDisplayString, setText as _setText, setProp as _setProp, renderEffect as _renderEffect, delegateEvents as _delegateEvents, template as _template } from 'vue';
+"import { child as _child, setProp as _setProp, toDisplayString as _toDisplayString, setText as _setText, renderEffect as _renderEffect, delegateEvents as _delegateEvents, template as _template } from 'vue';
 const t0 = _template("<button> </button>", true)
 _delegateEvents("click")
 
@@ -190,13 +190,47 @@ export function render(_ctx) {
   n0.$evtclick = e => _ctx.handleClick(e)
   _renderEffect(() => {
     const _count = _ctx.count
-    _setText(x0, _toDisplayString(_count) + "foo" + _toDisplayString(_count) + "foo" + _toDisplayString(_count))
     _setProp(n0, "id", _count)
+    _setText(x0, _toDisplayString(_count) + "foo" + _toDisplayString(_count) + "foo" + _toDisplayString(_count))
   })
   return n0
 }"
 `;
 
+exports[`compile > execution order > basic 1`] = `
+"import { child as _child, setProp as _setProp, toDisplayString as _toDisplayString, setText as _setText, renderEffect as _renderEffect, template as _template } from 'vue';
+const t0 = _template("<div> </div>", true)
+
+export function render(_ctx) {
+  const n0 = t0()
+  const x0 = _child(n0)
+  _renderEffect(() => {
+    _setProp(n0, "id", _ctx.foo)
+    _setText(x0, _toDisplayString(_ctx.bar))
+  })
+  return n0
+}"
+`;
+
+exports[`compile > execution order > with v-once 1`] = `
+"import { child as _child, next as _next, nthChild as _nthChild, toDisplayString as _toDisplayString, setText as _setText, renderEffect as _renderEffect, template as _template } from 'vue';
+const t0 = _template("<div><span> </span> <br> </div>", true)
+
+export function render(_ctx) {
+  const n3 = t0()
+  const n0 = _child(n3)
+  const n1 = _next(n0)
+  const n2 = _nthChild(n3, 3)
+  const x0 = _child(n0)
+  _setText(x0, _toDisplayString(_ctx.foo))
+  _renderEffect(() => {
+    _setText(n1, " " + _toDisplayString(_ctx.bar))
+    _setText(n2, " " + _toDisplayString(_ctx.baz))
+  })
+  return n3
+}"
+`;
+
 exports[`compile > expression parsing > interpolation 1`] = `
 "
   const n0 = t0()
@@ -230,6 +264,30 @@ export function render(_ctx) {
 }"
 `;
 
+exports[`compile > setInsertionState > next, child and nthChild should be above the setInsertionState 1`] = `
+"import { resolveComponent as _resolveComponent, child as _child, next as _next, setInsertionState as _setInsertionState, createComponentWithFallback as _createComponentWithFallback, nthChild as _nthChild, createIf as _createIf, setProp as _setProp, renderEffect as _renderEffect, template as _template } from 'vue';
+const t0 = _template("<div></div>")
+const t1 = _template("<div><div></div><!><div></div><!><div><button></button></div></div>", true)
+
+export function render(_ctx) {
+  const _component_Comp = _resolveComponent("Comp")
+  const n6 = t1()
+  const n5 = _next(_child(n6))
+  const n7 = _nthChild(n6, 3)
+  const p0 = _next(n7)
+  const n4 = _child(p0)
+  _setInsertionState(n6, n5)
+  const n0 = _createComponentWithFallback(_component_Comp)
+  _setInsertionState(n6, n7)
+  const n1 = _createIf(() => (true), () => {
+    const n3 = t0()
+    return n3
+  })
+  _renderEffect(() => _setProp(n4, "disabled", _ctx.foo))
+  return n6
+}"
+`;
+
 exports[`compile > static + dynamic root 1`] = `
 "import { toDisplayString as _toDisplayString, setText as _setText, template as _template } from 'vue';
 const t0 = _template(" ")

packages/compiler-vapor/__tests__/compile.spec.ts

@@ -220,4 +220,46 @@ describe('compile', () => {
       expect(code).matchSnapshot()
     })
   })
+
+  describe('setInsertionState', () => {
+    test('next, child and nthChild should be above the setInsertionState', () => {
+      const code = compile(`
+      <div>
+        <div />
+        <Comp />
+        <div />
+        <div v-if="true" />
+        <div>
+          <button :disabled="foo" />
+        </div>
+      </div>
+      `)
+      expect(code).toMatchSnapshot()
+    })
+  })
+
+  describe('execution order', () => {
+    test('basic', () => {
+      const code = compile(`<div :id="foo">{{ bar }}</div>`)
+      expect(code).matchSnapshot()
+      expect(code).contains(
+        `_setProp(n0, "id", _ctx.foo)
+    _setText(x0, _toDisplayString(_ctx.bar))`,
+      )
+    })
+    test('with v-once', () => {
+      const code = compile(
+        `<div>
+          <span v-once>{{ foo }}</span>
+          {{ bar }}<br>
+          {{ baz }}
+        </div>`,
+      )
+      expect(code).matchSnapshot()
+      expect(code).contains(
+        `_setText(n1, " " + _toDisplayString(_ctx.bar))
+    _setText(n2, " " + _toDisplayString(_ctx.baz))`,
+      )
+    })
+  })
 })

packages/compiler-vapor/__tests__/transforms/__snapshots__/expression.spec.ts.snap

@@ -32,3 +32,24 @@ export function render(_ctx, $props, $emit, $attrs, $slots) {
   return n0
 }"
 `;
+
+exports[`compiler: expression > update expression 1`] = `
+"import { child as _child, setProp as _setProp, toDisplayString as _toDisplayString, setText as _setText, renderEffect as _renderEffect, template as _template } from 'vue';
+const t0 = _template("<div> </div>", true)
+
+export function render(_ctx) {
+  const n1 = t0()
+  const n0 = _child(n1)
+  const x1 = _child(n1)
+  _renderEffect(() => {
+    const _String = String
+    const _foo = _ctx.foo
+    _setProp(n1, "id", _String(_foo.id++))
+    _setProp(n1, "foo", _foo)
+    _setProp(n1, "bar", _ctx.bar++)
+    _setText(n0, _toDisplayString(_String(_foo.id++)) + " " + _toDisplayString(_foo) + " " + _toDisplayString(_ctx.bar))
+    _setText(x1, _toDisplayString(_String(_foo.id++)) + " " + _toDisplayString(_foo) + " " + _toDisplayString(_ctx.bar))
+  })
+  return n1
+}"
+`;

packages/compiler-vapor/__tests__/transforms/__snapshots__/transformChildren.spec.ts.snap

@@ -67,7 +67,6 @@ export function render(_ctx) {
   const x2 = _child(n2)
   _renderEffect(() => {
     const _msg = _ctx.msg
-    
     _setText(x0, _toDisplayString(_msg))
     _setText(x1, _toDisplayString(_msg))
     _setText(x2, _toDisplayString(_msg))

packages/compiler-vapor/__tests__/transforms/__snapshots__/transformElement.spec.ts.snap

@@ -77,6 +77,16 @@ export function render(_ctx, $props, $emit, $attrs, $slots) {
 }"
 `;
 
+exports[`compiler: element transform > component > resolve implicitly self-referencing component 1`] = `
+"import { resolveComponent as _resolveComponent, createComponentWithFallback as _createComponentWithFallback } from 'vue';
+
+export function render(_ctx) {
+  const _component_Example__self = _resolveComponent("Example", true)
+  const n0 = _createComponentWithFallback(_component_Example__self, null, null, true)
+  return n0
+}"
+`;
+
 exports[`compiler: element transform > component > resolve namespaced component from props bindings (inline) 1`] = `
 "
   const n0 = _createComponent(Foo.Example, null, null, true)
@@ -178,6 +188,18 @@ export function render(_ctx) {
 }"
 `;
 
+exports[`compiler: element transform > component > v-for on component should not mark as single root 1`] = `
+"import { createComponent as _createComponent, createFor as _createFor } from 'vue';
+
+export function render(_ctx, $props, $emit, $attrs, $slots) {
+  const n0 = _createFor(() => (_ctx.items), (_for_item0) => {
+    const n2 = _createComponent(_ctx.Comp)
+    return n2
+  }, (item) => (item), 2)
+  return n0
+}"
+`;
+
 exports[`compiler: element transform > component > v-on expression is a function call 1`] = `
 "import { resolveComponent as _resolveComponent, createComponentWithFallback as _createComponentWithFallback } from 'vue';
 

packages/compiler-vapor/__tests__/transforms/__snapshots__/transformTemplateRef.spec.ts.snap

@@ -13,6 +13,26 @@ export function render(_ctx) {
 }"
 `;
 
+exports[`compiler: template ref transform > function ref 1`] = `
+"import { createTemplateRefSetter as _createTemplateRefSetter, renderEffect as _renderEffect, template as _template } from 'vue';
+const t0 = _template("<div></div>", true)
+
+export function render(_ctx) {
+  const _setTemplateRef = _createTemplateRefSetter()
+  const n0 = t0()
+  let r0
+  _renderEffect(() => {
+    const _foo = _ctx.foo
+    r0 = _setTemplateRef(n0, bar => {
+        _foo.value = bar
+        ;({ baz: _ctx.baz } = bar)
+        console.log(_foo.value, _ctx.baz)
+      }, r0)
+  })
+  return n0
+}"
+`;
+
 exports[`compiler: template ref transform > ref + v-for 1`] = `
 "import { createTemplateRefSetter as _createTemplateRefSetter, createFor as _createFor, template as _template } from 'vue';
 const t0 = _template("<div></div>", true)

packages/compiler-vapor/__tests__/transforms/__snapshots__/vBind.spec.ts.snap

@@ -55,7 +55,6 @@ export function render(_ctx) {
     const _foo = _ctx.foo
     const _bar = _ctx.bar
     const _foo_bar_baz = _foo[_bar(_ctx.baz)]
-    
     _setProp(n0, "id", _foo_bar_baz)
     _setProp(n1, "id", _foo_bar_baz)
     _setProp(n2, "id", _bar() + _foo)
@@ -75,6 +74,17 @@ export function render(_ctx) {
 }"
 `;
 
+exports[`cache multiple access > not cache variable in function expression 1`] = `
+"import { setDynamicProps as _setDynamicProps, renderEffect as _renderEffect, template as _template } from 'vue';
+const t0 = _template("<div></div>", true)
+
+export function render(_ctx) {
+  const n0 = t0()
+  _renderEffect(() => _setDynamicProps(n0, [{ foo: bar => _ctx.foo = bar }], true))
+  return n0
+}"
+`;
+
 exports[`cache multiple access > not cache variable only used in property shorthand 1`] = `
 "import { setStyle as _setStyle, renderEffect as _renderEffect, template as _template } from 'vue';
 const t0 = _template("<div></div>", true)
@@ -96,7 +106,6 @@ export function render(_ctx) {
   _renderEffect(() => {
     const _obj = _ctx.obj
     const _obj_foo_baz_obj_bar = _obj['foo']['baz'] + _obj.bar
-    
     _setProp(n0, "id", _obj_foo_baz_obj_bar)
     _setProp(n1, "id", _obj_foo_baz_obj_bar)
   })
@@ -115,7 +124,6 @@ export function render(_ctx) {
   _renderEffect(() => {
     const _foo = _ctx.foo
     const _foo_bar = _foo + _ctx.bar
-    
     _setProp(n0, "id", _foo_bar)
     _setProp(n1, "id", _foo_bar)
     _setProp(n2, "id", _foo + _foo_bar)
@@ -133,7 +141,6 @@ export function render(_ctx) {
   const n1 = t0()
   _renderEffect(() => {
     const _foo_bar = _ctx.foo + _ctx.bar
-    
     _setProp(n0, "id", _foo_bar)
     _setProp(n1, "id", _foo_bar)
   })
@@ -166,7 +173,6 @@ export function render(_ctx) {
   const n1 = t0()
   _renderEffect(() => {
     const _foo = _ctx.foo
-    
     _setClass(n0, _foo)
     _setClass(n1, _foo)
   })
@@ -487,15 +493,13 @@ export function render(_ctx) {
     _setAttr(n0, "form", _ctx.form)
     _setAttr(n1, "list", _ctx.list)
     _setAttr(n2, "type", _ctx.type)
-    
     _setAttr(n3, "width", _width)
-    _setAttr(n4, "width", _width)
-    _setAttr(n5, "width", _width)
-    _setAttr(n6, "width", _width)
-    
     _setAttr(n3, "height", _height)
+    _setAttr(n4, "width", _width)
     _setAttr(n4, "height", _height)
+    _setAttr(n5, "width", _width)
     _setAttr(n5, "height", _height)
+    _setAttr(n6, "width", _width)
     _setAttr(n6, "height", _height)
   })
   return [n0, n1, n2, n3, n4, n5, n6]

packages/compiler-vapor/__tests__/transforms/__snapshots__/vIf.spec.ts.snap

@@ -134,3 +134,29 @@ export function render(_ctx) {
   return n0
 }"
 `;
+
+exports[`compiler: v-if > v-if + v-if / v-else[-if] 1`] = `
+"import { setInsertionState as _setInsertionState, createIf as _createIf, template as _template } from 'vue';
+const t0 = _template("<span>foo</span>")
+const t1 = _template("<span>bar</span>")
+const t2 = _template("<span>baz</span>")
+const t3 = _template("<div></div>", true)
+
+export function render(_ctx) {
+  const n8 = t3()
+  _setInsertionState(n8)
+  const n0 = _createIf(() => (_ctx.foo), () => {
+    const n2 = t0()
+    return n2
+  })
+  _setInsertionState(n8)
+  const n3 = _createIf(() => (_ctx.bar), () => {
+    const n5 = t1()
+    return n5
+  }, () => {
+    const n7 = t2()
+    return n7
+  })
+  return n8
+}"
+`;

packages/compiler-vapor/__tests__/transforms/__snapshots__/vOn.spec.ts.snap

@@ -123,6 +123,18 @@ export function render(_ctx, $props, $emit, $attrs, $slots) {
 }"
 `;
 
+exports[`v-on > expression with type 1`] = `
+"import { delegateEvents as _delegateEvents, template as _template } from 'vue';
+const t0 = _template("<div></div>", true)
+_delegateEvents("click")
+
+export function render(_ctx, $props, $emit, $attrs, $slots) {
+  const n0 = t0()
+  n0.$evtclick = e => _ctx.handleClick(e)
+  return n0
+}"
+`;
+
 exports[`v-on > function expression w/ prefixIdentifiers: true 1`] = `
 "import { delegateEvents as _delegateEvents, template as _template } from 'vue';
 const t0 = _template("<div></div>", true)

packages/compiler-vapor/__tests__/transforms/__snapshots__/vSlot.spec.ts.snap

@@ -343,3 +343,90 @@ export function render(_ctx) {
   return n1
 }"
 `;
+
+exports[`compiler: transform slot > slot + v-if / v-else[-if] should not cause error 1`] = `
+"import { resolveComponent as _resolveComponent, setInsertionState as _setInsertionState, createSlot as _createSlot, createComponentWithFallback as _createComponentWithFallback, createIf as _createIf, template as _template } from 'vue';
+const t0 = _template("<div></div>", true)
+
+export function render(_ctx) {
+  const _component_Foo = _resolveComponent("Foo")
+  const _component_Bar = _resolveComponent("Bar")
+  const n6 = t0()
+  _setInsertionState(n6)
+  const n0 = _createSlot("foo", null)
+  _setInsertionState(n6)
+  const n1 = _createIf(() => (true), () => {
+    const n3 = _createComponentWithFallback(_component_Foo)
+    return n3
+  }, () => {
+    const n5 = _createComponentWithFallback(_component_Bar)
+    return n5
+  })
+  return n6
+}"
+`;
+
+exports[`compiler: transform slot > with whitespace: 'preserve' > implicit default slot 1`] = `
+"import { resolveComponent as _resolveComponent, createComponentWithFallback as _createComponentWithFallback, template as _template } from 'vue';
+const t0 = _template(" Header ")
+const t1 = _template(" ")
+const t2 = _template("<p></p>")
+
+export function render(_ctx) {
+  const _component_Comp = _resolveComponent("Comp")
+  const n4 = _createComponentWithFallback(_component_Comp, null, {
+    "header": () => {
+      const n0 = t0()
+      return n0
+    }, 
+    "default": () => {
+      const n2 = t1()
+      const n3 = t2()
+      return [n2, n3]
+    }
+  }, true)
+  return n4
+}"
+`;
+
+exports[`compiler: transform slot > with whitespace: 'preserve' > named default slot + implicit whitespace content 1`] = `
+"import { resolveComponent as _resolveComponent, createComponentWithFallback as _createComponentWithFallback, template as _template } from 'vue';
+const t0 = _template(" Header ")
+const t1 = _template(" Default ")
+
+export function render(_ctx) {
+  const _component_Comp = _resolveComponent("Comp")
+  const n5 = _createComponentWithFallback(_component_Comp, null, {
+    "header": () => {
+      const n0 = t0()
+      return n0
+    }, 
+    "default": () => {
+      const n3 = t1()
+      return n3
+    }
+  }, true)
+  return n5
+}"
+`;
+
+exports[`compiler: transform slot > with whitespace: 'preserve' > should not generate whitespace only default slot 1`] = `
+"import { resolveComponent as _resolveComponent, createComponentWithFallback as _createComponentWithFallback, template as _template } from 'vue';
+const t0 = _template(" Header ")
+const t1 = _template(" Footer ")
+
+export function render(_ctx) {
+  const _component_Comp = _resolveComponent("Comp")
+  const n5 = _createComponentWithFallback(_component_Comp, null, {
+    "header": () => {
+      const n0 = t0()
+      return n0
+    }, 
+    "footer": () => {
+      const n3 = t1()
+      return n3
+    }
+  }, true)
+  return n5
+}"
+`;

packages/compiler-vapor/__tests__/transforms/expression.spec.ts

@@ -1,9 +1,15 @@
 import { BindingTypes } from '@vue/compiler-dom'
-import { transformChildren, transformText } from '../../src'
+import {
+  transformChildren,
+  transformElement,
+  transformText,
+  transformVBind,
+} from '../../src'
 import { makeCompile } from './_utils'
 
 const compileWithExpression = makeCompile({
-  nodeTransforms: [transformChildren, transformText],
+  nodeTransforms: [transformElement, transformChildren, transformText],
+  directiveTransforms: { bind: transformVBind },
 })
 
 describe('compiler: expression', () => {
@@ -31,4 +37,14 @@ describe('compiler: expression', () => {
     expect(code).toMatchSnapshot()
     expect(code).contains(`$props['bar']`)
   })
+
+  test('update expression', () => {
+    const { code } = compileWithExpression(`
+      <div :id="String(foo.id++)" :foo="foo" :bar="bar++">
+        {{ String(foo.id++) }} {{ foo }} {{ bar }}
+      </div>
+    `)
+    expect(code).toMatchSnapshot()
+    expect(code).contains(`_String(_foo.id++)`)
+  })
 })

packages/compiler-vapor/__tests__/transforms/transformChildren.spec.ts

@@ -69,8 +69,8 @@ describe('compiler: children transform', () => {
       </div>`,
     )
     // ensure the insertion anchor is generated before the insertion statement
-    expect(code).toMatch(`const n3 = _next(_child(n4))
+    expect(code).toMatch(`const n3 = _next(_child(n4))`)
-  _setInsertionState(n4, n3)`)
+    expect(code).toMatch(`_setInsertionState(n4, n3)`)
     expect(code).toMatchSnapshot()
   })
 })

packages/compiler-vapor/__tests__/transforms/transformElement.spec.ts

@@ -6,16 +6,22 @@ import {
   transformElement,
   transformText,
   transformVBind,
+  transformVFor,
   transformVOn,
 } from '../../src'
 import {
   type BindingMetadata,
   BindingTypes,
   NodeTypes,
-} from '@vue/compiler-core'
+} from '@vue/compiler-dom'
 
 const compileWithElementTransform = makeCompile({
-  nodeTransforms: [transformElement, transformChildren, transformText],
+  nodeTransforms: [
+    transformVFor,
+    transformElement,
+    transformChildren,
+    transformText,
+  ],
   directiveTransforms: {
     bind: transformVBind,
     on: transformVOn,
@@ -39,11 +45,12 @@ describe('compiler: element transform', () => {
       })
     })
 
-    test.todo('resolve implicitly self-referencing component', () => {
+    test('resolve implicitly self-referencing component', () => {
       const { code, helpers } = compileWithElementTransform(`<Example/>`, {
         filename: `/foo/bar/Example.vue?vue&type=template`,
       })
       expect(code).toMatchSnapshot()
+      expect(code).toContain('_resolveComponent("Example", true)')
       expect(helpers).toContain('resolveComponent')
     })
 
@@ -169,6 +176,17 @@ describe('compiler: element transform', () => {
       expect(code).contains('_createComponent(_ctx.Comp)')
     })
 
+    test('v-for on component should not mark as single root', () => {
+      const { code } = compileWithElementTransform(
+        `<Comp v-for="item in items" :key="item"/>`,
+        {
+          bindingMetadata: { Comp: BindingTypes.SETUP_CONST },
+        },
+      )
+      expect(code).toMatchSnapshot()
+      expect(code).contains('_createComponent(_ctx.Comp)')
+    })
+
     test('static props', () => {
       const { code, ir } = compileWithElementTransform(
         `<Foo id="foo" class="bar" />`,

packages/compiler-vapor/__tests__/transforms/transformSlotOutlet.spec.ts

@@ -1,4 +1,4 @@
-import { ErrorCodes, NodeTypes } from '@vue/compiler-core'
+import { ErrorCodes, NodeTypes } from '@vue/compiler-dom'
 import {
   IRNodeTypes,
   transformChildren,

packages/compiler-vapor/__tests__/transforms/transformTemplateRef.spec.ts

@@ -81,6 +81,47 @@ describe('compiler: template ref transform', () => {
     expect(code).contains('_setTemplateRef(n0, _ctx.foo, r0)')
   })
 
+  test('function ref', () => {
+    const { ir, code } = compileWithTransformRef(
+      `<div :ref="bar => {
+        foo.value = bar
+        ;({ baz } = bar)
+        console.log(foo.value, baz)
+      }" />`,
+    )
+    expect(ir.block.dynamic.children[0]).toMatchObject({
+      id: 0,
+      flags: DynamicFlag.REFERENCED,
+    })
+    expect(ir.template).toEqual(['<div></div>'])
+    expect(ir.block.operation).toMatchObject([
+      {
+        type: IRNodeTypes.DECLARE_OLD_REF,
+        id: 0,
+      },
+    ])
+    expect(ir.block.effect).toMatchObject([
+      {
+        operations: [
+          {
+            type: IRNodeTypes.SET_TEMPLATE_REF,
+            element: 0,
+            value: {
+              isStatic: false,
+            },
+          },
+        ],
+      },
+    ])
+    expect(code).toMatchSnapshot()
+    expect(code).contains('const _setTemplateRef = _createTemplateRefSetter()')
+    expect(code).contains(`_setTemplateRef(n0, bar => {
+        _foo.value = bar
+        ;({ baz: _ctx.baz } = bar)
+        console.log(_foo.value, _ctx.baz)
+      }, r0)`)
+  })
+
   test('ref + v-if', () => {
     const { ir, code } = compileWithTransformRef(
       `<div ref="foo" v-if="true" />`,

packages/compiler-vapor/__tests__/transforms/vBind.spec.ts

@@ -809,4 +809,12 @@ describe('cache multiple access', () => {
     expect(code).matchSnapshot()
     expect(code).not.contains('const _bar = _ctx.bar')
   })
+
+  test('not cache variable in function expression', () => {
+    const { code } = compileWithVBind(`
+        <div v-bind="{ foo: bar => foo = bar }"></div>
+      `)
+    expect(code).matchSnapshot()
+    expect(code).not.contains('const _bar = _ctx.bar')
+  })
 })

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

@@ -10,7 +10,7 @@ import {
   transformVOnce,
   transformVText,
 } from '../../src'
-import { NodeTypes } from '@vue/compiler-core'
+import { NodeTypes } from '@vue/compiler-dom'
 
 const compileWithVIf = makeCompile({
   nodeTransforms: [
@@ -215,6 +215,17 @@ describe('compiler: v-if', () => {
     })
   })
 
+  test('v-if + v-if / v-else[-if]', () => {
+    const { code } = compileWithVIf(
+      `<div>
+        <span v-if="foo">foo</span>
+        <span v-if="bar">bar</span>
+        <span v-else>baz</span>
+      </div>`,
+    )
+    expect(code).toMatchSnapshot()
+  })
+
   test('comment between branches', () => {
     const { code, ir } = compileWithVIf(`
       <div v-if="ok"/>

packages/compiler-vapor/__tests__/transforms/vOn.spec.ts

@@ -682,4 +682,17 @@ describe('v-on', () => {
       '_delegate(n0, "click", _withModifiers(e => _ctx.test(e), ["stop"]))',
     )
   })
+
+  test('expression with type', () => {
+    const { code } = compileWithVOn(
+      `<div @click="(<number>handleClick as any)"></div>`,
+      {
+        bindingMetadata: {
+          handleClick: BindingTypes.SETUP_CONST,
+        },
+      },
+    )
+    expect(code).matchSnapshot()
+    expect(code).include('n0.$evtclick = e => _ctx.handleClick(e)')
+  })
 })

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

@@ -1,4 +1,4 @@
-import { ErrorCodes, NodeTypes } from '@vue/compiler-core'
+import { ErrorCodes, NodeTypes } from '@vue/compiler-dom'
 import {
   IRNodeTypes,
   IRSlotType,
@@ -371,6 +371,17 @@ describe('compiler: transform slot', () => {
     })
   })
 
+  test('slot + v-if / v-else[-if] should not cause error', () => {
+    const { code } = compileWithSlots(
+      `<div>
+        <slot name="foo"></slot>
+        <Foo v-if="true"></Foo>
+        <Bar v-else />
+      </div>`,
+    )
+    expect(code).toMatchSnapshot()
+  })
+
   test('quote slot name', () => {
     const { code } = compileWithSlots(
       `<Comp><template #nav-bar-title-before></template></Comp>`,
@@ -527,4 +538,60 @@ describe('compiler: transform slot', () => {
       })
     })
   })
+
+  describe(`with whitespace: 'preserve'`, () => {
+    test('named default slot + implicit whitespace content', () => {
+      const source = `
+      <Comp>
+        <template #header> Header </template>
+        <template #default> Default </template>
+      </Comp>
+      `
+      const { code } = compileWithSlots(source, {
+        whitespace: 'preserve',
+      })
+
+      expect(
+        `Extraneous children found when component already has explicitly named default slot.`,
+      ).not.toHaveBeenWarned()
+      expect(code).toMatchSnapshot()
+    })
+
+    test('implicit default slot', () => {
+      const source = `
+      <Comp>
+        <template #header> Header </template>
+        <p/>
+      </Comp>
+      `
+      const { code } = compileWithSlots(source, {
+        whitespace: 'preserve',
+      })
+
+      expect(
+        `Extraneous children found when component already has explicitly named default slot.`,
+      ).not.toHaveBeenWarned()
+      expect(code).toMatchSnapshot()
+    })
+
+    test('should not generate whitespace only default slot', () => {
+      const source = `
+      <Comp>
+        <template #header> Header </template>
+        <template #footer> Footer </template>
+      </Comp>
+      `
+      const { code, ir } = compileWithSlots(source, {
+        whitespace: 'preserve',
+      })
+
+      const slots = (ir.block.dynamic.children[0].operation as any).slots[0]
+        .slots
+      // should be: header, footer (no default)
+      expect(Object.keys(slots).length).toBe(2)
+      expect(!!slots['default']).toBe(false)
+
+      expect(code).toMatchSnapshot()
+    })
+  })
 })

packages/compiler-vapor/src/compile.ts

@@ -81,8 +81,8 @@ export function getBaseTransformPreset(): TransformPreset {
       transformVFor,
       transformSlotOutlet,
       transformTemplateRef,
-      transformText,
       transformElement,
+      transformText,
       transformVSlot,
       transformComment,
       transformChildren,

packages/compiler-vapor/src/generators/block.ts

@@ -44,7 +44,21 @@ export function genBlockContent(
   const resetBlock = context.enterBlock(block)
 
   if (root) {
-    genResolveAssets('component', 'resolveComponent')
+    for (let name of context.ir.component) {
+      const id = toValidAssetId(name, 'component')
+      const maybeSelfReference = name.endsWith('__self')
+      if (maybeSelfReference) name = name.slice(0, -6)
+      push(
+        NEWLINE,
+        `const ${id} = `,
+        ...genCall(
+          context.helper('resolveComponent'),
+          JSON.stringify(name),
+          // pass additional `maybeSelfReference` flag
+          maybeSelfReference ? 'true' : undefined,
+        ),
+      )
+    }
     genResolveAssets('directive', 'resolveDirective')
   }
 
@@ -52,7 +66,7 @@ export function genBlockContent(
     push(...genSelf(child, context))
   }
   for (const child of dynamic.children) {
-    push(...genChildren(child, context, `n${child.id!}`))
+    push(...genChildren(child, context, push, `n${child.id!}`))
   }
 
   push(...genOperations(operation, context))

packages/compiler-vapor/src/generators/component.ts

@@ -34,7 +34,7 @@ import {
   isMemberExpression,
   toValidAssetId,
   walkIdentifiers,
-} from '@vue/compiler-core'
+} from '@vue/compiler-dom'
 import { genEventHandler } from './event'
 import { genDirectiveModifiers, genDirectivesForElement } from './directive'
 import { genBlock } from './block'

packages/compiler-vapor/src/generators/expression.ts

@@ -10,6 +10,7 @@ import {
   NewlineType,
   type SimpleExpressionNode,
   type SourceLocation,
+  TS_NODE_TYPES,
   advancePositionWithClone,
   createSimpleExpression,
   isInDestructureAssignment,
@@ -20,7 +21,6 @@ import type { Identifier, Node } from '@babel/types'
 import type { CodegenContext } from '../generate'
 import { isConstantExpression } from '../utils'
 import { type CodeFragment, NEWLINE, buildCodeFragment } from './utils'
-import { walk } from 'estree-walker'
 import { type ParserOptions, parseExpression } from '@babel/parser'
 
 export function genExpression(
@@ -64,6 +64,7 @@ export function genExpression(
   let hasMemberExpression = false
   if (ids.length) {
     const [frag, push] = buildCodeFragment()
+    const isTSNode = ast && TS_NODE_TYPES.includes(ast.type)
     ids
       .sort((a, b) => a.start! - b.start!)
       .forEach((id, i) => {
@@ -72,8 +73,10 @@ export function genExpression(
         const end = id.end! - 1
         const last = ids[i - 1]
 
+        if (!(isTSNode && i === 0)) {
           const leadingText = content.slice(last ? last.end! - 1 : 0, start)
           if (leadingText.length) push([leadingText, NewlineType.Unknown])
+        }
 
         const source = content.slice(start, end)
         const parentStack = parentStackMap.get(id)!
@@ -100,7 +103,7 @@ export function genExpression(
           ),
         )
 
-        if (i === ids.length - 1 && end < content.length) {
+        if (i === ids.length - 1 && end < content.length && !isTSNode) {
           push([content.slice(end), NewlineType.Unknown])
         }
       })
@@ -245,8 +248,13 @@ export function processExpressions(
   expressions: SimpleExpressionNode[],
 ): DeclarationResult {
   // analyze variables
-  const { seenVariable, variableToExpMap, expToVariableMap, seenIdentifier } =
+  const {
-    analyzeExpressions(expressions)
+    seenVariable,
+    variableToExpMap,
+    expToVariableMap,
+    seenIdentifier,
+    updatedVariable,
+  } = analyzeExpressions(expressions)
 
   // process repeated identifiers and member expressions
   // e.g., `foo[baz]` will be transformed into `foo_baz`
@@ -256,6 +264,7 @@ export function processExpressions(
     variableToExpMap,
     expToVariableMap,
     seenIdentifier,
+    updatedVariable,
   )
 
   // process duplicate expressions after identifier and member expression handling.
@@ -264,6 +273,8 @@ export function processExpressions(
     context,
     expressions,
     varDeclarations,
+    updatedVariable,
+    expToVariableMap,
   )
 
   return genDeclarations([...varDeclarations, ...expDeclarations], context)
@@ -274,11 +285,13 @@ function analyzeExpressions(expressions: SimpleExpressionNode[]) {
   const variableToExpMap = new Map<string, Set<SimpleExpressionNode>>()
   const expToVariableMap = new Map<SimpleExpressionNode, string[]>()
   const seenIdentifier = new Set<string>()
+  const updatedVariable = new Set<string>()
 
   const registerVariable = (
     name: string,
     exp: SimpleExpressionNode,
     isIdentifier: boolean,
+    parentStack: Node[] = [],
   ) => {
     if (isIdentifier) seenIdentifier.add(name)
     seenVariable[name] = (seenVariable[name] || 0) + 1
@@ -287,6 +300,13 @@ function analyzeExpressions(expressions: SimpleExpressionNode[]) {
       (variableToExpMap.get(name) || new Set()).add(exp),
     )
     expToVariableMap.set(exp, (expToVariableMap.get(exp) || []).concat(name))
+    if (
+      parentStack.some(
+        p => p.type === 'UpdateExpression' || p.type === 'AssignmentExpression',
+      )
+    ) {
+      updatedVariable.add(name)
+    }
   }
 
   for (const exp of expressions) {
@@ -295,37 +315,25 @@ function analyzeExpressions(expressions: SimpleExpressionNode[]) {
       continue
     }
 
-    walk(exp.ast, {
+    walkIdentifiers(exp.ast, (currentNode, parent, parentStack) => {
-      enter(currentNode: Node, parent: Node | null) {
+      if (parent && isMemberExpression(parent)) {
-        if (currentNode.type === 'MemberExpression') {
+        const memberExp = extractMemberExpression(parent, name => {
-          const memberExp = extractMemberExpression(
-            currentNode,
-            (name: string) => {
           registerVariable(name, exp, true)
-            },
+        })
-          )
+        registerVariable(memberExp, exp, false, parentStack)
-          registerVariable(memberExp, exp, false)
+      } else if (!parentStack.some(isMemberExpression)) {
-          return this.skip()
+        registerVariable(currentNode.name, exp, true, parentStack)
       }
-
-        // skip shorthand or non-computed property keys
-        if (
-          parent &&
-          parent.type === 'ObjectProperty' &&
-          parent.key === currentNode &&
-          (parent.shorthand || !parent.computed)
-        ) {
-          return this.skip()
-        }
-
-        if (currentNode.type === 'Identifier') {
-          registerVariable(currentNode.name, exp, true)
-        }
-      },
     })
   }
 
-  return { seenVariable, seenIdentifier, variableToExpMap, expToVariableMap }
+  return {
+    seenVariable,
+    seenIdentifier,
+    variableToExpMap,
+    expToVariableMap,
+    updatedVariable,
+  }
 }
 
 function processRepeatedVariables(
@@ -334,9 +342,11 @@ function processRepeatedVariables(
   variableToExpMap: Map<string, Set<SimpleExpressionNode>>,
   expToVariableMap: Map<SimpleExpressionNode, string[]>,
   seenIdentifier: Set<string>,
+  updatedVariable: Set<string>,
 ): DeclarationValue[] {
   const declarations: DeclarationValue[] = []
   for (const [name, exps] of variableToExpMap) {
+    if (updatedVariable.has(name)) continue
     if (seenVariable[name] > 1 && exps.size > 0) {
       const isIdentifier = seenIdentifier.has(name)
       const varName = isIdentifier ? name : genVarName(name)
@@ -428,12 +438,19 @@ function processRepeatedExpressions(
   context: CodegenContext,
   expressions: SimpleExpressionNode[],
   varDeclarations: DeclarationValue[],
+  updatedVariable: Set<string>,
+  expToVariableMap: Map<SimpleExpressionNode, string[]>,
 ): DeclarationValue[] {
   const declarations: DeclarationValue[] = []
   const seenExp = expressions.reduce(
     (acc, exp) => {
+      const variables = expToVariableMap.get(exp)
       // only handle expressions that are not identifiers
-      if (exp.ast && exp.ast.type !== 'Identifier') {
+      if (
+        exp.ast &&
+        exp.ast.type !== 'Identifier' &&
+        !(variables && variables.some(v => updatedVariable.has(v)))
+      ) {
         acc[exp.content] = (acc[exp.content] || 0) + 1
       }
       return acc
@@ -580,3 +597,9 @@ function extractMemberExpression(
       return ''
   }
 }
+
+const isMemberExpression = (node: Node) => {
+  return (
+    node.type === 'MemberExpression' || node.type === 'OptionalMemberExpression'
+  )
+}

packages/compiler-vapor/src/generators/operation.ts

@@ -44,7 +44,7 @@ export function genOperationWithInsertionState(
 ): CodeFragment[] {
   const [frag, push] = buildCodeFragment()
   if (isBlockOperation(oper) && oper.parent) {
-    push(...genInsertionstate(oper, context))
+    push(...genInsertionState(oper, context))
   }
   push(...genOperation(oper, context))
   return frag
@@ -99,10 +99,8 @@ export function genEffects(
   effects: IREffect[],
   context: CodegenContext,
 ): CodeFragment[] {
-  const {
+  const { helper } = context
-    helper,
+  const expressions = effects.flatMap(effect => effect.expressions)
-    block: { expressions },
-  } = context
   const [frag, push, unshift] = buildCodeFragment()
   let operationsCount = 0
   const { ids, frag: declarationFrags } = processExpressions(
@@ -152,7 +150,7 @@ export function genEffect(
   return frag
 }
 
-function genInsertionstate(
+function genInsertionState(
   operation: InsertionStateTypes,
   context: CodegenContext,
 ): CodeFragment[] {

packages/compiler-vapor/src/generators/prop.ts

@@ -2,7 +2,7 @@ import {
   NewlineType,
   type SimpleExpressionNode,
   isSimpleIdentifier,
-} from '@vue/compiler-core'
+} from '@vue/compiler-dom'
 import type { CodegenContext } from '../generate'
 import {
   IRDynamicPropsKind,

packages/compiler-vapor/src/generators/template.ts

@@ -41,6 +41,7 @@ export function genSelf(
 export function genChildren(
   dynamic: IRDynamicInfo,
   context: CodegenContext,
+  pushBlock: (...items: CodeFragment[]) => number,
   from: string = `n${dynamic.id}`,
 ): CodeFragment[] {
   const { helper } = context
@@ -72,17 +73,17 @@ export function genChildren(
     // p for "placeholder" variables that are meant for possible reuse by
     // other access paths
     const variable = id === undefined ? `p${context.block.tempId++}` : `n${id}`
-    push(NEWLINE, `const ${variable} = `)
+    pushBlock(NEWLINE, `const ${variable} = `)
 
     if (prev) {
       if (elementIndex - prev[1] === 1) {
-        push(...genCall(helper('next'), prev[0]))
+        pushBlock(...genCall(helper('next'), prev[0]))
       } else {
-        push(...genCall(helper('nthChild'), from, String(elementIndex)))
+        pushBlock(...genCall(helper('nthChild'), from, String(elementIndex)))
       }
     } else {
       if (elementIndex === 0) {
-        push(...genCall(helper('child'), from))
+        pushBlock(...genCall(helper('child'), from))
       } else {
         // check if there's a node that we can reuse from
         let init = genCall(helper('child'), from)
@@ -91,7 +92,7 @@ export function genChildren(
         } else if (elementIndex > 1) {
           init = genCall(helper('nthChild'), from, String(elementIndex))
         }
-        push(...init)
+        pushBlock(...init)
       }
     }
 
@@ -109,7 +110,7 @@ export function genChildren(
 
   if (childrenToGen.length) {
     for (const [child, from] of childrenToGen) {
-      push(...genChildren(child, context, from))
+      push(...genChildren(child, context, pushBlock, from))
     }
   }
 

packages/compiler-vapor/src/ir/index.ts

@@ -52,7 +52,6 @@ export interface BlockIRNode extends BaseIRNode {
   tempId: number
   effect: IREffect[]
   operation: OperationNode[]
-  expressions: SimpleExpressionNode[]
   returns: number[]
 }
 

packages/compiler-vapor/src/transform.ts

@@ -11,6 +11,7 @@ import {
   type TemplateChildNode,
   defaultOnError,
   defaultOnWarn,
+  getSelfName,
   isVSlot,
 } from '@vue/compiler-dom'
 import { EMPTY_OBJ, NOOP, extend, isArray, isString } from '@vue/shared'
@@ -61,6 +62,7 @@ export type StructuralDirectiveTransform = (
 export type TransformOptions = HackOptions<BaseTransformOptions>
 
 export class TransformContext<T extends AllNode = AllNode> {
+  selfName: string | null = null
   parent: TransformContext<RootNode | ElementNode> | null = null
   root: TransformContext<RootNode>
   index: number = 0
@@ -93,6 +95,7 @@ export class TransformContext<T extends AllNode = AllNode> {
   ) {
     this.options = extend({}, defaultOptions, options)
     this.root = this as TransformContext<RootNode>
+    if (options.filename) this.selfName = getSelfName(options.filename)
   }
 
   enterBlock(ir: BlockIRNode, isVFor: boolean = false): () => void {
@@ -138,8 +141,10 @@ export class TransformContext<T extends AllNode = AllNode> {
 
   registerEffect(
     expressions: SimpleExpressionNode[],
-    ...operations: OperationNode[]
+    operation: OperationNode | OperationNode[],
+    getIndex = (): number => this.block.effect.length,
   ): void {
+    const operations = [operation].flat()
     expressions = expressions.filter(exp => !isConstantExpression(exp))
     if (
       this.inVOnce ||
@@ -151,28 +156,12 @@ export class TransformContext<T extends AllNode = AllNode> {
       return this.registerOperation(...operations)
     }
 
-    this.block.expressions.push(...expressions)
+    this.block.effect.splice(getIndex(), 0, {
-    const existing = this.block.effect.find(e =>
-      isSameExpression(e.expressions, expressions),
-    )
-    if (existing) {
-      existing.operations.push(...operations)
-    } else {
-      this.block.effect.push({
       expressions,
       operations,
     })
   }
 
-    function isSameExpression(
-      a: SimpleExpressionNode[],
-      b: SimpleExpressionNode[],
-    ) {
-      if (a.length !== b.length) return false
-      return a.every((exp, i) => exp.content === b[i].content)
-    }
-  }
-
   registerOperation(...node: OperationNode[]): void {
     this.block.operation.push(...node)
   }

packages/compiler-vapor/src/transforms/transformElement.ts

@@ -44,6 +44,8 @@ export const isReservedProp: (key: string) => boolean = /*#__PURE__*/ makeMap(
 )
 
 export const transformElement: NodeTransform = (node, context) => {
+  let effectIndex = context.block.effect.length
+  const getEffectIndex = () => effectIndex++
   return function postTransformElement() {
     ;({ node } = context)
     if (
@@ -62,6 +64,7 @@ export const transformElement: NodeTransform = (node, context) => {
       context as TransformContext<ElementNode>,
       isComponent,
       isDynamicComponent,
+      getEffectIndex,
     )
 
     let { parent } = context
@@ -78,13 +81,23 @@ export const transformElement: NodeTransform = (node, context) => {
       parent.node.children.filter(child => child.type !== NodeTypes.COMMENT)
         .length === 1
 
-    ;(isComponent ? transformComponentElement : transformNativeElement)(
+    if (isComponent) {
-      node as any,
+      transformComponentElement(
+        node as ComponentNode,
         propsResult,
         singleRoot,
-      context as TransformContext<ElementNode>,
+        context,
         isDynamicComponent,
       )
+    } else {
+      transformNativeElement(
+        node as PlainElementNode,
+        propsResult,
+        singleRoot,
+        context,
+        getEffectIndex,
+      )
+    }
   }
 }
 
@@ -119,6 +132,13 @@ function transformComponentElement(
     }
 
     if (asset) {
+      // self referencing component (inferred from filename)
+      if (context.selfName && capitalize(camelize(tag)) === context.selfName) {
+        // generators/block.ts has special check for __self postfix when generating
+        // component imports, which will pass additional `maybeSelfReference` flag
+        // to `resolveComponent`.
+        tag += `__self`
+      }
       context.component.add(tag)
     }
   }
@@ -130,7 +150,7 @@ function transformComponentElement(
     tag,
     props: propsResult[0] ? propsResult[1] : [propsResult[1]],
     asset,
-    root: singleRoot,
+    root: singleRoot && !context.inVFor,
     slots: [...context.slots],
     once: context.inVOnce,
     dynamic: dynamicComponent,
@@ -176,7 +196,8 @@ function transformNativeElement(
   node: PlainElementNode,
   propsResult: PropsResult,
   singleRoot: boolean,
-  context: TransformContext<ElementNode>,
+  context: TransformContext,
+  getEffectIndex: () => number,
 ) {
   const { tag } = node
   const { scopeId } = context.options
@@ -189,12 +210,16 @@ function transformNativeElement(
   const dynamicProps: string[] = []
   if (propsResult[0] /* dynamic props */) {
     const [, dynamicArgs, expressions] = propsResult
-    context.registerEffect(expressions, {
+    context.registerEffect(
+      expressions,
+      {
         type: IRNodeTypes.SET_DYNAMIC_PROPS,
         element: context.reference(),
         props: dynamicArgs,
         root: singleRoot,
-    })
+      },
+      getEffectIndex,
+    )
   } else {
     for (const prop of propsResult[1]) {
       const { key, values } = prop
@@ -203,13 +228,17 @@ function transformNativeElement(
         if (values[0].content) template += `="${values[0].content}"`
       } else {
         dynamicProps.push(key.content)
-        context.registerEffect(values, {
+        context.registerEffect(
+          values,
+          {
             type: IRNodeTypes.SET_PROP,
             element: context.reference(),
             prop,
             root: singleRoot,
             tag,
-        })
+          },
+          getEffectIndex,
+        )
       }
     }
   }
@@ -246,6 +275,7 @@ export function buildProps(
   context: TransformContext<ElementNode>,
   isComponent: boolean,
   isDynamicComponent?: boolean,
+  getEffectIndex?: () => number,
 ): PropsResult {
   const props = node.props as (VaporDirectiveNode | AttributeNode)[]
   if (props.length === 0) return [false, []]
@@ -292,12 +322,12 @@ export function buildProps(
           } else {
             context.registerEffect(
               [prop.exp],
-
               {
                 type: IRNodeTypes.SET_DYNAMIC_EVENTS,
                 element: context.reference(),
                 event: prop.exp,
               },
+              getEffectIndex,
             )
           }
         } else {

packages/compiler-vapor/src/transforms/transformSlotOutlet.ts

@@ -9,7 +9,7 @@ import {
   createSimpleExpression,
   isStaticArgOf,
   isStaticExp,
-} from '@vue/compiler-core'
+} from '@vue/compiler-dom'
 import type { NodeTransform, TransformContext } from '../transform'
 import {
   type BlockIRNode,

packages/compiler-vapor/src/transforms/transformText.ts

@@ -23,6 +23,13 @@ const seen = new WeakMap<
   WeakSet<TemplateChildNode | RootNode>
 >()
 
+export function markNonTemplate(
+  node: TemplateChildNode,
+  context: TransformContext,
+): void {
+  seen.get(context.root)!.add(node)
+}
+
 export const transformText: NodeTransform = (node, context) => {
   if (!seen.has(context.root)) seen.set(context.root, new WeakSet())
   if (seen.get(context.root)!.has(node)) {
@@ -68,7 +75,7 @@ export const transformText: NodeTransform = (node, context) => {
           prev.type === NodeTypes.TEXT
         ) {
           // mark leading text node for skipping
-          seen.get(context.root)!.add(prev)
+          markNonTemplate(prev, context)
         }
       }
     }
@@ -143,7 +150,7 @@ function processTextContainer(
 }
 
 function createTextLikeExpression(node: TextLike, context: TransformContext) {
-  seen.get(context.root)!.add(node)
+  markNonTemplate(node, context)
   if (node.type === NodeTypes.TEXT) {
     return createSimpleExpression(node.content, true, node.loc)
   } else {

packages/compiler-vapor/src/transforms/utils.ts

@@ -29,7 +29,6 @@ export const newBlock = (node: BlockIRNode['node']): BlockIRNode => ({
   effect: [],
   operation: [],
   returns: [],
-  expressions: [],
   tempId: 0,
 })
 

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

@@ -65,7 +65,13 @@ export function processIf(
     if (siblings) {
       let i = siblings.length
       while (i--) {
-        if (siblings[i].operation) lastIfNode = siblings[i].operation
+        if (
+          siblings[i].operation &&
+          siblings[i].operation!.type === IRNodeTypes.IF
+        ) {
+          lastIfNode = siblings[i].operation
+          break
+        }
       }
     }
 

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

@@ -8,7 +8,7 @@ import {
   createCompilerError,
   isTemplateNode,
   isVSlot,
-} from '@vue/compiler-core'
+} from '@vue/compiler-dom'
 import type { NodeTransform, TransformContext } from '../transform'
 import { newBlock } from './utils'
 import {
@@ -24,6 +24,7 @@ import {
   type VaporDirectiveNode,
 } from '../ir'
 import { findDir, resolveExpression } from '../utils'
+import { markNonTemplate } from './transformText'
 
 export const transformVSlot: NodeTransform = (node, context) => {
   if (node.type !== NodeTypes.ELEMENT) return
@@ -66,11 +67,21 @@ function transformComponentSlot(
 ) {
   const { children } = node
   const arg = dir && dir.arg
-  const nonSlotTemplateChildren = children.filter(
+
-    n =>
+  // whitespace: 'preserve'
-      isNonWhitespaceContent(node) &&
+  const emptyTextNodes: TemplateChildNode[] = []
-      !(n.type === NodeTypes.ELEMENT && n.props.some(isVSlot)),
+  const nonSlotTemplateChildren = children.filter(n => {
-  )
+    if (isNonWhitespaceContent(n)) {
+      return !(n.type === NodeTypes.ELEMENT && n.props.some(isVSlot))
+    } else {
+      emptyTextNodes.push(n)
+    }
+  })
+  if (!nonSlotTemplateChildren.length) {
+    emptyTextNodes.forEach(n => {
+      markNonTemplate(n, context)
+    })
+  }
 
   const [block, onExit] = createSlotBlock(node, dir, context)
 

packages/reactivity/__tests__/computed.spec.ts

@@ -1017,6 +1017,17 @@ describe('reactivity/computed', () => {
     expect(cValue.value).toBe(1)
   })
 
+  test('should not recompute if computed does not track reactive data', async () => {
+    const spy = vi.fn()
+    const c1 = computed(() => spy())
+
+    c1.value
+    ref(0).value++ // update globalVersion
+    c1.value
+
+    expect(spy).toBeCalledTimes(1)
+  })
+
   test('computed should remain live after losing all subscribers', () => {
     const state = reactive({ a: 1 })
     const p = computed(() => state.a + 1)

packages/reactivity/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/reactivity",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "@vue/reactivity",
   "main": "index.js",
   "module": "dist/reactivity.esm-bundler.js",

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

@@ -324,4 +324,98 @@ describe('component: slots', () => {
       'Slot "default" invoked outside of the render function',
     ).not.toHaveBeenWarned()
   })
+
+  test('basic warn', () => {
+    const Comp = {
+      setup(_: any, { slots }: any) {
+        slots.default && slots.default()
+        return () => null
+      },
+    }
+
+    const App = {
+      setup() {
+        return () => h(Comp, () => h('div'))
+      },
+    }
+
+    createApp(App).mount(nodeOps.createElement('div'))
+    expect(
+      'Slot "default" invoked outside of the render function',
+    ).toHaveBeenWarned()
+  })
+
+  test('basic warn when mounting another app in setup', () => {
+    const Comp = {
+      setup(_: any, { slots }: any) {
+        slots.default?.()
+        return () => null
+      },
+    }
+
+    const mountComp = () => {
+      createApp({
+        setup() {
+          return () => h(Comp, () => 'msg')
+        },
+      }).mount(nodeOps.createElement('div'))
+    }
+
+    const App = {
+      setup() {
+        mountComp()
+        return () => null
+      },
+    }
+
+    createApp(App).mount(nodeOps.createElement('div'))
+    expect(
+      'Slot "default" invoked outside of the render function',
+    ).toHaveBeenWarned()
+  })
+
+  test('should not warn when render in setup', () => {
+    const container = {
+      setup(_: any, { slots }: any) {
+        return () => slots.default && slots.default()
+      },
+    }
+
+    const comp = h(container, null, () => h('div'))
+
+    const App = {
+      setup() {
+        render(h(comp), nodeOps.createElement('div'))
+        return () => null
+      },
+    }
+
+    createApp(App).mount(nodeOps.createElement('div'))
+    expect(
+      'Slot "default" invoked outside of the render function',
+    ).not.toHaveBeenWarned()
+  })
+
+  test('basic warn when render in setup', () => {
+    const container = {
+      setup(_: any, { slots }: any) {
+        slots.default && slots.default()
+        return () => null
+      },
+    }
+
+    const comp = h(container, null, () => h('div'))
+
+    const App = {
+      setup() {
+        render(h(comp), nodeOps.createElement('div'))
+        return () => null
+      },
+    }
+
+    createApp(App).mount(nodeOps.createElement('div'))
+    expect(
+      'Slot "default" invoked outside of the render function',
+    ).toHaveBeenWarned()
+  })
 })

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

@@ -1198,4 +1198,51 @@ describe('BaseTransition', () => {
   test('should not error on KeepAlive w/ function children', () => {
     expect(() => mount({}, () => () => h('div'), true)).not.toThrow()
   })
+
+  // #12465
+  test('mode: "out-in" w/ KeepAlive + fallthrough attrs (prod mode)', async () => {
+    __DEV__ = false
+    async function testOutIn({ trueBranch, falseBranch }: ToggleOptions) {
+      const toggle = ref(true)
+      const { props, cbs } = mockProps({ mode: 'out-in' }, true)
+      const root = nodeOps.createElement('div')
+      const App = {
+        render() {
+          return h(
+            BaseTransition,
+            {
+              ...props,
+              class: 'test',
+            },
+            () =>
+              h(KeepAlive, null, toggle.value ? trueBranch() : falseBranch()),
+          )
+        },
+      }
+      render(h(App), root)
+
+      expect(serializeInner(root)).toBe(`<div class="test">0</div>`)
+
+      // trigger toggle
+      toggle.value = false
+      await nextTick()
+      expect(props.onBeforeLeave).toHaveBeenCalledTimes(1)
+      expect(serialize((props.onBeforeLeave as any).mock.calls[0][0])).toBe(
+        `<div class="test">0</div>`,
+      )
+      expect(props.onLeave).toHaveBeenCalledTimes(1)
+      expect(serialize((props.onLeave as any).mock.calls[0][0])).toBe(
+        `<div class="test">0</div>`,
+      )
+      expect(props.onAfterLeave).not.toHaveBeenCalled()
+      // enter should not have started
+      expect(props.onBeforeEnter).not.toHaveBeenCalled()
+      expect(props.onEnter).not.toHaveBeenCalled()
+      expect(props.onAfterEnter).not.toHaveBeenCalled()
+      cbs.doneLeave[`<div class="test">0</div>`]()
+      expect(serializeInner(root)).toBe(`<span class="test">0</span>`)
+    }
+    await runTestWithKeepAlive(testOutIn)
+    __DEV__ = true
+  })
 })

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

@@ -10,14 +10,28 @@ import {
   markRaw,
   nextTick,
   nodeOps,
+  onMounted,
   h as originalH,
   ref,
   render,
+  serialize,
   serializeInner,
   withDirectives,
 } from '@vue/runtime-test'
-import { Fragment, createCommentVNode, createVNode } from '../../src/vnode'
+import {
+  Fragment,
+  createBlock,
+  createCommentVNode,
+  createTextVNode,
+  createVNode,
+  openBlock,
+} from '../../src/vnode'
+import { toDisplayString } from '@vue/shared'
 import { compile, createApp as createDOMApp, render as domRender } from 'vue'
+import type { HMRRuntime } from '../../src/hmr'
+
+declare var __VUE_HMR_RUNTIME__: HMRRuntime
+const { rerender, createRecord } = __VUE_HMR_RUNTIME__
 
 describe('renderer: teleport', () => {
   describe('eager mode', () => {
@@ -243,6 +257,39 @@ describe('renderer: teleport', () => {
       expect(serializeInner(target)).toBe(`teleported`)
     })
 
+    test('should traverse comment node after updating in optimize mode', async () => {
+      const target = nodeOps.createElement('div')
+      const root = nodeOps.createElement('div')
+      const count = ref(0)
+      let teleport
+
+      __DEV__ = false
+      render(
+        h(() => {
+          teleport =
+            (openBlock(),
+            createBlock(Teleport, { to: target }, [
+              createCommentVNode('comment in teleport'),
+            ]))
+          return h('div', null, [
+            createTextVNode(toDisplayString(count.value)),
+            teleport,
+          ])
+        }),
+        root,
+      )
+      const commentNode = teleport!.children[0].el
+      expect(serializeInner(root)).toBe(`<div>0</div>`)
+      expect(serializeInner(target)).toBe(`<!--comment in teleport-->`)
+      expect(serialize(commentNode)).toBe(`<!--comment in teleport-->`)
+
+      count.value = 1
+      await nextTick()
+      __DEV__ = true
+      expect(serializeInner(root)).toBe(`<div>1</div>`)
+      expect(teleport!.children[0].el).toBe(commentNode)
+    })
+
     test('should remove children when unmounted', () => {
       const target = nodeOps.createElement('div')
       const root = nodeOps.createElement('div')
@@ -269,6 +316,34 @@ describe('renderer: teleport', () => {
       testUnmount({ to: null, disabled: true })
     })
 
+    // #10747
+    test('should unmount correctly when using top level comment in teleport', async () => {
+      const target = nodeOps.createElement('div')
+      const root = nodeOps.createElement('div')
+      const count = ref(0)
+
+      __DEV__ = false
+      render(
+        h(() => {
+          return h('div', null, [
+            createTextVNode(toDisplayString(count.value)),
+            (openBlock(),
+            createBlock(Teleport, { to: target }, [
+              createCommentVNode('comment in teleport'),
+            ])),
+          ])
+        }),
+        root,
+      )
+
+      count.value = 1
+
+      await nextTick()
+      __DEV__ = true
+      render(null, root)
+      expect(root.children.length).toBe(0)
+    })
+
     test('component with multi roots should be removed when unmounted', () => {
       const target = nodeOps.createElement('div')
       const root = nodeOps.createElement('div')
@@ -741,4 +816,56 @@ describe('renderer: teleport', () => {
       expect(tRefInMounted).toBe(target.children[1])
     })
   }
+
+  test('handle update and hmr rerender', async () => {
+    const target = document.createElement('div')
+    const root = document.createElement('div')
+
+    const Comp = {
+      setup() {
+        const cls = ref('foo')
+        onMounted(() => {
+          // trigger update
+          cls.value = 'bar'
+        })
+        return { cls, target }
+      },
+      template: `
+        <Teleport :to="target">
+          <div :class="cls">
+            <div>
+              <slot></slot>
+            </div>
+          </div>
+        </Teleport>
+      `,
+    }
+
+    const appId = 'test-app-id'
+    const App = {
+      __hmrId: appId,
+      components: { Comp },
+      render() {
+        return originalH(Comp, null, { default: () => originalH('div', 'foo') })
+      },
+    }
+    createRecord(appId, App)
+
+    domRender(originalH(App), root)
+    expect(target.innerHTML).toBe(
+      '<div class="foo"><div><div>foo</div></div></div>',
+    )
+    await nextTick()
+    expect(target.innerHTML).toBe(
+      '<div class="bar"><div><div>foo</div></div></div>',
+    )
+
+    rerender(appId, () =>
+      originalH(Comp, null, { default: () => originalH('div', 'bar') }),
+    )
+    await nextTick()
+    expect(target.innerHTML).toBe(
+      '<div class="bar"><div><div>bar</div></div></div>',
+    )
+  })
 })

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

@@ -1,4 +1,10 @@
-import { isReactive, reactive, shallowReactive } from '../../src/index'
+import {
+  effect,
+  isReactive,
+  reactive,
+  readonly,
+  shallowReactive,
+} from '../../src/index'
 import { renderList } from '../../src/helpers/renderList'
 
 describe('renderList', () => {
@@ -65,4 +71,31 @@ describe('renderList', () => {
     const shallowReactiveArray = shallowReactive([{ foo: 1 }])
     expect(renderList(shallowReactiveArray, isReactive)).toEqual([false])
   })
+
+  it('should not allow mutation', () => {
+    const arr = readonly(reactive([{ foo: 1 }]))
+    expect(
+      renderList(arr, item => {
+        ;(item as any).foo = 0
+        return item.foo
+      }),
+    ).toEqual([1])
+    expect(
+      `Set operation on key "foo" failed: target is readonly.`,
+    ).toHaveBeenWarned()
+  })
+
+  it('should trigger effect for deep mutations in readonly reactive arrays', () => {
+    const arr = reactive([{ foo: 1 }])
+    const readonlyArr = readonly(arr)
+
+    let dummy
+    effect(() => {
+      dummy = renderList(readonlyArr, item => item.foo)
+    })
+    expect(dummy).toEqual([1])
+
+    arr[0].foo = 2
+    expect(dummy).toEqual([2])
+  })
 })

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

@@ -32,10 +32,13 @@ import {
   withCtx,
   withDirectives,
 } from '@vue/runtime-dom'
+import type { HMRRuntime } from '../src/hmr'
 import { type SSRContext, renderToString } from '@vue/server-renderer'
 import { PatchFlags, normalizeStyle } from '@vue/shared'
 import { vShowOriginalDisplay } from '../../runtime-dom/src/directives/vShow'
-import { expect } from 'vitest'
+
+declare var __VUE_HMR_RUNTIME__: HMRRuntime
+const { createRecord, reload } = __VUE_HMR_RUNTIME__
 
 function mountWithHydration(html: string, render: () => any) {
   const container = document.createElement('div')
@@ -1843,6 +1846,60 @@ describe('SSR hydration', () => {
     }
   })
 
+  test('hmr reload child wrapped in KeepAlive', async () => {
+    const id = 'child-reload'
+    const Child = {
+      __hmrId: id,
+      template: `<div>foo</div>`,
+    }
+    createRecord(id, Child)
+
+    const appId = 'test-app-id'
+    const App = {
+      __hmrId: appId,
+      components: { Child },
+      template: `
+      <div>
+        <KeepAlive>
+          <Child />
+        </KeepAlive>
+      </div>
+      `,
+    }
+
+    const root = document.createElement('div')
+    root.innerHTML = await renderToString(h(App))
+    createSSRApp(App).mount(root)
+    expect(root.innerHTML).toBe('<div><div>foo</div></div>')
+
+    reload(id, {
+      __hmrId: id,
+      template: `<div>bar</div>`,
+    })
+    await nextTick()
+    expect(root.innerHTML).toBe('<div><div>bar</div></div>')
+  })
+
+  test('hmr root reload', async () => {
+    const appId = 'test-app-id'
+    const App = {
+      __hmrId: appId,
+      template: `<div>foo</div>`,
+    }
+
+    const root = document.createElement('div')
+    root.innerHTML = await renderToString(h(App))
+    createSSRApp(App).mount(root)
+    expect(root.innerHTML).toBe('<div>foo</div>')
+
+    reload(appId, {
+      __hmrId: appId,
+      template: `<div>bar</div>`,
+    })
+    await nextTick()
+    expect(root.innerHTML).toBe('<div>bar</div>')
+  })
+
   describe('mismatch handling', () => {
     test('text node', () => {
       const { container } = mountWithHydration(`foo`, () => 'bar')

packages/runtime-core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/runtime-core",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "@vue/runtime-core",
   "main": "index.js",
   "module": "dist/runtime-core.esm-bundler.js",

packages/runtime-core/src/component.ts

@@ -837,7 +837,7 @@ export function setupComponent(
     vi(instance)
   } else {
     initProps(instance, props, isStateful, isSSR)
-    initSlots(instance, children, optimized)
+    initSlots(instance, children, optimized || isSSR)
   }
 
   const setupResult = isStateful

packages/runtime-core/src/componentSlots.ts

@@ -17,7 +17,11 @@ import {
 } from '@vue/shared'
 import { warn } from './warning'
 import { isKeepAlive } from './components/KeepAlive'
-import { type ContextualRenderFn, withCtx } from './componentRenderContext'
+import {
+  type ContextualRenderFn,
+  currentRenderingInstance,
+  withCtx,
+} from './componentRenderContext'
 import { isHmrUpdating } from './hmr'
 import { DeprecationTypes, isCompatEnabled } from './compat/compatConfig'
 import { TriggerOpTypes, trigger } from '@vue/reactivity'
@@ -75,6 +79,11 @@ export type RawSlots = {
    * @internal
    */
   _?: SlotFlags
+  /**
+   * cache indexes for slot content
+   * @internal
+   */
+  __?: number[]
 }
 
 const isInternalKey = (key: string) => key[0] === '_' || key === '$stable'
@@ -98,7 +107,8 @@ const normalizeSlot = (
       __DEV__ &&
       currentInstance &&
       !currentInstance.vapor &&
-      (!ctx || ctx.root === (currentInstance as ComponentInternalInstance).root)
+      !(ctx === null && currentRenderingInstance) &&
+      !(ctx && ctx.root !== currentInstance.root)
     ) {
       warn(
         `Slot "${key}" invoked outside of the render function: ` +
@@ -171,7 +181,7 @@ const assignSlots = (
     // when rendering the optimized slots by manually written render function,
     // do not copy the `slots._` compiler flag so that `renderSlot` creates
     // slot Fragment with BAIL patchFlag to force full updates
-    if (optimized || key !== '_') {
+    if (optimized || !isInternalKey(key)) {
       slots[key] = children[key]
     }
   }

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

@@ -501,9 +501,8 @@ function getInnerChild(vnode: VNode): VNode | undefined {
 
     return vnode
   }
-  // #7121 ensure get the child component subtree in case
+  // #7121,#12465 get the component subtree if it's been mounted
-  // it's been replaced during HMR
+  if (vnode.component) {
-  if (__DEV__ && vnode.component) {
     return vnode.component.subTree
   }
 

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

@@ -220,7 +220,8 @@ export const TeleportImpl = {
         // even in block tree mode we need to make sure all root-level nodes
         // in the teleport inherit previous DOM references so that they can
         // be moved in future patches.
-        traverseStaticChildren(n1, n2, true)
+        // in dev mode, deep traversal is necessary for HMR
+        traverseStaticChildren(n1, n2, !__DEV__)
       } else if (!optimized) {
         patchChildren(
           n1,

packages/runtime-core/src/helpers/renderList.ts

@@ -1,9 +1,11 @@
 import type { VNode, VNodeChild } from '../vnode'
 import {
   isReactive,
+  isReadonly,
   isShallow,
   shallowReadArray,
   toReactive,
+  toReadonly,
 } from '@vue/reactivity'
 import { isArray, isObject, isString } from '@vue/shared'
 import { warn } from '../warning'
@@ -69,14 +71,20 @@ export function renderList(
   if (sourceIsArray || isString(source)) {
     const sourceIsReactiveArray = sourceIsArray && isReactive(source)
     let needsWrap = false
+    let isReadonlySource = false
     if (sourceIsReactiveArray) {
       needsWrap = !isShallow(source)
+      isReadonlySource = isReadonly(source)
       source = shallowReadArray(source)
     }
     ret = new Array(source.length)
     for (let i = 0, l = source.length; i < l; i++) {
       ret[i] = renderItem(
-        needsWrap ? toReactive(source[i]) : source[i],
+        needsWrap
+          ? isReadonlySource
+            ? toReadonly(toReactive(source[i]))
+            : toReactive(source[i])
+          : source[i],
         i,
         undefined,
         cached && cached[i],

packages/runtime-core/src/index.ts

@@ -561,3 +561,7 @@ export { initFeatureFlags } from './featureFlags'
  * @internal
  */
 export { ensureVaporSlotFallback } from './helpers/renderSlot'
+/**
+ * @internal
+ */
+export { createInternalObject } from './internalObject'

packages/runtime-core/src/renderer.ts

@@ -1248,12 +1248,12 @@ function baseCreateRenderer(
       }
     }
 
-    // setup() is async. This component relies on async logic to be resolved
-    // before proceeding
-    if (__FEATURE_SUSPENSE__ && instance.asyncDep) {
     // avoid hydration for hmr updating
     if (__DEV__ && isHmrUpdating) initialVNode.el = null
 
+    // setup() is async. This component relies on async logic to be resolved
+    // before proceeding
+    if (__FEATURE_SUSPENSE__ && instance.asyncDep) {
       parentSuspense &&
         parentSuspense.registerDep(instance, setupRenderEffect, optimized)
 
@@ -2169,7 +2169,9 @@ function baseCreateRenderer(
 
     // unset ref
     if (ref != null) {
+      pauseTracking()
       setRef(ref, null, parentSuspense, vnode, true)
+      resetTracking()
     }
 
     // #6593 should clean memo cache when unmount
@@ -2343,7 +2345,17 @@ function baseCreateRenderer(
       unregisterHMR(instance)
     }
 
-    const { bum, scope, job, subTree, um, m, a } = instance
+    const {
+      bum,
+      scope,
+      job,
+      subTree,
+      um,
+      m,
+      a,
+      parent,
+      slots: { __: slotCacheKeys },
+    } = instance
     invalidateMount(m)
     invalidateMount(a)
 
@@ -2352,6 +2364,13 @@ function baseCreateRenderer(
       invokeArrayFns(bum)
     }
 
+    // remove slots content from parent renderCache
+    if (parent && isArray(slotCacheKeys)) {
+      slotCacheKeys.forEach(v => {
+        ;(parent as ComponentInternalInstance).renderCache[v] = undefined
+      })
+    }
+
     if (
       __COMPAT__ &&
       isCompatEnabled(DeprecationTypes.INSTANCE_EVENT_HOOKS, instance)
@@ -2502,9 +2521,12 @@ function baseCreateRenderer(
     // HMR root reload
     if (__DEV__) {
       app._context.reload = () => {
+        const cloned = cloneVNode(vnode)
+        // avoid hydration for hmr updating
+        cloned.el = null
         // casting to ElementNamespace because TS doesn't guarantee type narrowing
         // over function boundaries
-        render(cloneVNode(vnode), container, namespace as ElementNamespace)
+        render(cloned, container, namespace as ElementNamespace)
       }
     }
 
@@ -2610,11 +2632,15 @@ export function traverseStaticChildren(
       if (c2.type === Text) {
         c2.el = c1.el
       }
-      // also inherit for comment nodes, but not placeholders (e.g. v-if which
+      // #2324 also inherit for comment nodes, but not placeholders (e.g. v-if which
       // would have received .el during block patch)
-      if (__DEV__ && c2.type === Comment && !c2.el) {
+      if (c2.type === Comment && !c2.el) {
         c2.el = c1.el
       }
+
+      if (__DEV__) {
+        c2.el && (c2.el.__vnode = c2)
+      }
     }
   }
 }

packages/runtime-dom/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/runtime-dom",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "@vue/runtime-dom",
   "main": "index.js",
   "module": "dist/runtime-dom.esm-bundler.js",

packages/runtime-dom/src/components/TransitionGroup.ts

@@ -82,6 +82,7 @@ const TransitionGroupImpl: ComponentOptions = /*@__PURE__*/ decorate({
           moveClass,
         )
       ) {
+        prevChildren = []
         return
       }
 
@@ -111,6 +112,7 @@ const TransitionGroupImpl: ComponentOptions = /*@__PURE__*/ decorate({
         })
         el.addEventListener('transitionend', cb)
       })
+      prevChildren = []
     })
 
     return () => {

packages/runtime-vapor/__tests__/apiCreateDynamicComponent.spec.ts

@@ -1,6 +1,14 @@
-import { shallowRef } from '@vue/reactivity'
+import { ref, shallowRef } from '@vue/reactivity'
-import { nextTick } from '@vue/runtime-dom'
+import { nextTick, resolveDynamicComponent } from '@vue/runtime-dom'
-import { createDynamicComponent } from '../src'
+import {
+  createComponentWithFallback,
+  createDynamicComponent,
+  defineVaporComponent,
+  renderEffect,
+  setHtml,
+  setInsertionState,
+  template,
+} from '../src'
 import { makeRender } from './_utils'
 
 const define = makeRender()
@@ -54,4 +62,52 @@ describe('api: createDynamicComponent', () => {
     await nextTick()
     expect(html()).toBe('<baz></baz><!--dynamic-component-->')
   })
+
+  test('render fallback with insertionState', async () => {
+    const { html, mount } = define({
+      setup() {
+        const html = ref('hi')
+        const n1 = template('<div></div>', true)() as any
+        setInsertionState(n1)
+        const n0 = createComponentWithFallback(
+          resolveDynamicComponent('button') as any,
+        ) as any
+        renderEffect(() => setHtml(n0, html.value))
+        return n1
+      },
+    }).create()
+
+    mount()
+    expect(html()).toBe('<div><button>hi</button></div>')
+  })
+
+  test('switch dynamic component children', async () => {
+    const CompA = defineVaporComponent({
+      setup() {
+        return template('<div>A</div>')()
+      },
+    })
+    const CompB = defineVaporComponent({
+      setup() {
+        return template('<div>B</div>')()
+      },
+    })
+
+    const current = shallowRef(CompA)
+    const { html } = define({
+      setup() {
+        const t1 = template('<div></div>')
+        const n2 = t1() as any
+        setInsertionState(n2)
+        createDynamicComponent(() => current.value)
+        return n2
+      },
+    }).render()
+
+    expect(html()).toBe('<div><div>A</div><!--dynamic-component--></div>')
+
+    current.value = CompB
+    await nextTick()
+    expect(html()).toBe('<div><div>B</div><!--dynamic-component--></div>')
+  })
 })

packages/runtime-vapor/__tests__/component.spec.ts

@@ -2,6 +2,7 @@ import {
   type Ref,
   inject,
   nextTick,
+  onMounted,
   onUpdated,
   provide,
   ref,
@@ -13,6 +14,7 @@ import {
   createIf,
   createTextNode,
   renderEffect,
+  setInsertionState,
   template,
 } from '../src'
 import { makeRender } from './_utils'
@@ -266,6 +268,29 @@ describe('component', () => {
     expect(spy).toHaveBeenCalledTimes(2)
   })
 
+  it('properly mount child component when using setInsertionState', async () => {
+    const spy = vi.fn()
+
+    const { component: Comp } = define({
+      setup() {
+        onMounted(spy)
+        return template('<h1>hi</h1>')()
+      },
+    })
+
+    const { host } = define({
+      setup() {
+        const n2 = template('<div></div>', true)()
+        setInsertionState(n2 as any)
+        createComponent(Comp)
+        return n2
+      },
+    }).render()
+
+    expect(host.innerHTML).toBe('<div><h1>hi</h1></div>')
+    expect(spy).toHaveBeenCalledTimes(1)
+  })
+
   it('unmount component', async () => {
     const { host, app, instance } = define(() => {
       const count = ref(0)

packages/runtime-vapor/__tests__/componentAttrs.spec.ts

@@ -1,6 +1,15 @@
-import { type Ref, nextTick, ref } from '@vue/runtime-dom'
+import {
+  type Ref,
+  createApp,
+  defineComponent,
+  h,
+  nextTick,
+  ref,
+} from '@vue/runtime-dom'
 import {
   createComponent,
+  createDynamicComponent,
+  createSlot,
   defineVaporComponent,
   renderEffect,
   setClass,
@@ -8,6 +17,7 @@ import {
   setProp,
   setStyle,
   template,
+  vaporInteropPlugin,
 } from '../src'
 import { makeRender } from './_utils'
 import { stringifyStyle } from '@vue/shared'
@@ -277,7 +287,43 @@ describe('attribute fallthrough', () => {
     expect(getCSS()).not.toContain('font-size:bold')
   })
 
-  test('parent value should take priority', async () => {
+  it('should fallthrough attrs to dynamic component', async () => {
+    const Comp = defineVaporComponent({
+      setup() {
+        const n1 = createDynamicComponent(
+          () => 'button',
+          null,
+          {
+            default: () => {
+              const n0 = createSlot('default', null)
+              return n0
+            },
+          },
+          true,
+        )
+        return n1
+      },
+    })
+
+    const { html } = define({
+      setup() {
+        return createComponent(
+          Comp,
+          {
+            class: () => 'foo',
+          },
+          null,
+          true,
+        )
+      },
+    }).render()
+
+    expect(html()).toBe(
+      '<button class="foo"><!--slot--></button><!--dynamic-component-->',
+    )
+  })
+
+  it('parent value should take priority', async () => {
     const parentVal = ref('parent')
     const childVal = ref('child')
 
@@ -322,4 +368,81 @@ describe('attribute fallthrough', () => {
     expect(el.getAttribute('aria-x')).toBe(parentVal.value)
     expect(el.getAttribute('aria-y')).toBe(parentVal.value)
   })
+
+  it('empty string should not be passed to classList.add', async () => {
+    const t0 = template('<div>', true /* root */)
+    const Child = defineVaporComponent({
+      setup() {
+        const n = t0() as Element
+        renderEffect(() => {
+          setClass(n, {
+            foo: false,
+          })
+        })
+        return n
+      },
+    })
+
+    const Parent = defineVaporComponent({
+      setup() {
+        return createComponent(
+          Child,
+          {
+            class: () => ({
+              bar: false,
+            }),
+          },
+          null,
+          true,
+        )
+      },
+    })
+
+    const { host } = define({
+      setup() {
+        return createComponent(Parent)
+      },
+    }).render()
+
+    const el = host.children[0]
+    expect(el.classList.length).toBe(0)
+  })
+
+  it('should not fallthrough emit handlers to vdom child', () => {
+    const VDomChild = defineComponent({
+      emits: ['click'],
+      setup(_, { emit }) {
+        return () => h('button', { onClick: () => emit('click') }, 'click me')
+      },
+    })
+
+    const fn = vi.fn()
+    const VaporChild = defineVaporComponent({
+      emits: ['click'],
+      setup() {
+        return createComponent(
+          VDomChild as any,
+          { onClick: () => fn },
+          null,
+          true,
+        )
+      },
+    })
+
+    const App = {
+      setup() {
+        return () => h(VaporChild as any)
+      },
+    }
+
+    const root = document.createElement('div')
+    createApp(App).use(vaporInteropPlugin).mount(root)
+
+    expect(root.innerHTML).toBe('<button>click me</button>')
+    const button = root.querySelector('button')!
+    button.dispatchEvent(new Event('click'))
+
+    // fn should be called once
+    expect(fn).toHaveBeenCalledTimes(1)
+  })
 })

packages/runtime-vapor/__tests__/componentProps.spec.ts

@@ -497,6 +497,36 @@ describe('component: props', () => {
     expect(changeSpy).toHaveBeenCalledTimes(1)
   })
 
+  test('should not warn invalid watch source when directly watching props', async () => {
+    const changeSpy = vi.fn()
+    const { render, html } = define({
+      props: {
+        foo: {
+          type: String,
+        },
+      },
+      setup(props: any) {
+        watch(props, changeSpy)
+        const t0 = template('<h1></h1>')
+        const n0 = t0()
+        renderEffect(() => {
+          setElementText(n0, String(props.foo))
+        })
+        return n0
+      },
+    })
+
+    const foo = ref('foo')
+    render({ foo: () => foo.value })
+    expect(html()).toBe(`<h1>foo</h1>`)
+    expect('Invalid watch source').not.toHaveBeenWarned()
+
+    foo.value = 'bar'
+    await nextTick()
+    expect(html()).toBe(`<h1>bar</h1>`)
+    expect(changeSpy).toHaveBeenCalledTimes(1)
+  })
+
   test('support null in required + multiple-type declarations', () => {
     const { render } = define({
       props: {

packages/runtime-vapor/__tests__/dom/templateRef.spec.ts

@@ -1,10 +1,13 @@
 import type { NodeRef } from '../../src/apiTemplateRef'
 import {
+  child,
   createComponent,
+  createDynamicComponent,
   createFor,
   createIf,
   createSlot,
   createTemplateRefSetter,
+  defineVaporComponent,
   insert,
   renderEffect,
   template,
@@ -19,7 +22,8 @@ import {
   useTemplateRef,
   watchEffect,
 } from '@vue/runtime-dom'
-import { setElementText } from '../../src/dom/prop'
+import { setElementText, setText } from '../../src/dom/prop'
+import type { VaporComponent } from '../../src/component'
 
 const define = makeRender()
 
@@ -676,6 +680,39 @@ describe('api: template ref', () => {
     expect(r!.value).toBe(n)
   })
 
+  test('work with dynamic component', async () => {
+    const Child = defineVaporComponent({
+      setup(_, { expose }) {
+        const msg = ref('one')
+        expose({ setMsg: (m: string) => (msg.value = m) })
+        const n0 = template(`<div> </div>`)() as any
+        const x0 = child(n0) as any
+        renderEffect(() => setText(x0, msg.value))
+        return n0
+      },
+    })
+
+    const views: Record<string, VaporComponent> = { child: Child }
+    const view = ref('child')
+    const refKey = ref<any>(null)
+
+    const { html } = define({
+      setup() {
+        const setRef = createTemplateRefSetter()
+        const n0 = createDynamicComponent(() => views[view.value]) as any
+        setRef(n0, refKey)
+        return n0
+      },
+    }).render()
+
+    expect(html()).toBe('<div>one</div><!--dynamic-component-->')
+    expect(refKey.value).toBeDefined()
+
+    refKey.value.setMsg('changed')
+    await nextTick()
+    expect(html()).toBe('<div>changed</div><!--dynamic-component-->')
+  })
+
   // TODO: can not reproduce in Vapor
   // // #2078
   // test('handling multiple merged refs', async () => {

packages/runtime-vapor/__tests__/for.spec.ts

@@ -4,7 +4,14 @@ import {
   getRestElement,
   renderEffect,
 } from '../src'
-import { nextTick, ref, shallowRef, triggerRef } from '@vue/runtime-dom'
+import {
+  nextTick,
+  reactive,
+  readonly,
+  ref,
+  shallowRef,
+  triggerRef,
+} from '@vue/runtime-dom'
 import { makeRender } from './_utils'
 
 const define = makeRender()
@@ -674,4 +681,57 @@ describe('createFor', () => {
     await nextTick()
     expectCalledTimesToBe('Clear rows', 1, 0, 0, 0)
   })
+
+  describe('readonly source', () => {
+    test('should not allow mutation', () => {
+      const arr = readonly(reactive([{ foo: 1 }]))
+
+      const { host } = define(() => {
+        const n1 = createFor(
+          () => arr,
+          (item, key, index) => {
+            const span = document.createElement('li')
+            renderEffect(() => {
+              item.value.foo = 0
+              span.innerHTML = `${item.value.foo}`
+            })
+            return span
+          },
+          idx => idx,
+        )
+        return n1
+      }).render()
+
+      expect(host.innerHTML).toBe('<li>1</li><!--for-->')
+      expect(
+        `Set operation on key "foo" failed: target is readonly.`,
+      ).toHaveBeenWarned()
+    })
+
+    test('should trigger effect for deep mutations', async () => {
+      const arr = reactive([{ foo: 1 }])
+      const readonlyArr = readonly(arr)
+
+      const { host } = define(() => {
+        const n1 = createFor(
+          () => readonlyArr,
+          (item, key, index) => {
+            const span = document.createElement('li')
+            renderEffect(() => {
+              span.innerHTML = `${item.value.foo}`
+            })
+            return span
+          },
+          idx => idx,
+        )
+        return n1
+      }).render()
+
+      expect(host.innerHTML).toBe('<li>1</li><!--for-->')
+
+      arr[0].foo = 2
+      await nextTick()
+      expect(host.innerHTML).toBe('<li>2</li><!--for-->')
+    })
+  })
 })

packages/runtime-vapor/src/apiCreateDynamicComponent.ts

@@ -1,9 +1,15 @@
 import { resolveDynamicComponent } from '@vue/runtime-dom'
-import { DynamicFragment, type VaporFragment } from './block'
+import { DynamicFragment, type VaporFragment, insert } from './block'
 import { createComponentWithFallback } from './component'
 import { renderEffect } from './renderEffect'
 import type { RawProps } from './componentProps'
 import type { RawSlots } from './componentSlots'
+import {
+  insertionAnchor,
+  insertionParent,
+  resetInsertionState,
+} from './insertionState'
+import { isHydrating, locateHydrationNode } from './dom/hydration'
 
 export function createDynamicComponent(
   getter: () => any,
@@ -11,9 +17,18 @@ export function createDynamicComponent(
   rawSlots?: RawSlots | null,
   isSingleRoot?: boolean,
 ): VaporFragment {
+  const _insertionParent = insertionParent
+  const _insertionAnchor = insertionAnchor
+  if (isHydrating) {
+    locateHydrationNode()
+  } else {
+    resetInsertionState()
+  }
+
   const frag = __DEV__
     ? new DynamicFragment('dynamic-component')
     : new DynamicFragment()
+
   renderEffect(() => {
     const value = getter()
     frag.update(
@@ -27,5 +42,10 @@ export function createDynamicComponent(
       value,
     )
   })
+
+  if (!isHydrating && _insertionParent) {
+    insert(frag, _insertionParent, _insertionAnchor)
+  }
+
   return frag
 }

packages/runtime-vapor/src/apiCreateFor.ts

@@ -2,12 +2,14 @@ import {
   EffectScope,
   type ShallowRef,
   isReactive,
+  isReadonly,
   isShallow,
   pauseTracking,
   resetTracking,
   shallowReadArray,
   shallowRef,
   toReactive,
+  toReadonly,
 } from '@vue/reactivity'
 import { getSequence, isArray, isObject, isString } from '@vue/shared'
 import { createComment, createTextNode } from './dom/node'
@@ -23,7 +25,11 @@ import type { DynamicSlot } from './componentSlots'
 import { renderEffect } from './renderEffect'
 import { VaporVForFlags } from '../../shared/src/vaporFlags'
 import { isHydrating, locateHydrationNode } from './dom/hydration'
-import { insertionAnchor, insertionParent } from './insertionState'
+import {
+  insertionAnchor,
+  insertionParent,
+  resetInsertionState,
+} from './insertionState'
 
 class ForBlock extends VaporFragment {
   scope: EffectScope | undefined
@@ -55,6 +61,7 @@ type Source = any[] | Record<any, any> | number | Set<any> | Map<any, any>
 type ResolvedSource = {
   values: any[]
   needsWrap: boolean
+  isReadonlySource: boolean
   keys?: string[]
 }
 
@@ -72,6 +79,8 @@ export const createFor = (
   const _insertionAnchor = insertionAnchor
   if (isHydrating) {
     locateHydrationNode()
+  } else {
+    resetInsertionState()
   }
 
   let isMounted = false
@@ -387,11 +396,13 @@ export function createForSlots(
 function normalizeSource(source: any): ResolvedSource {
   let values = source
   let needsWrap = false
+  let isReadonlySource = false
   let keys
   if (isArray(source)) {
     if (isReactive(source)) {
       needsWrap = !isShallow(source)
       values = shallowReadArray(source)
+      isReadonlySource = isReadonly(source)
     }
   } else if (isString(source)) {
     values = source.split('')
@@ -412,14 +423,23 @@ function normalizeSource(source: any): ResolvedSource {
       }
     }
   }
-  return { values, needsWrap, keys }
+  return {
+    values,
+    needsWrap,
+    isReadonlySource,
+    keys,
+  }
 }
 
 function getItem(
-  { keys, values, needsWrap }: ResolvedSource,
+  { keys, values, needsWrap, isReadonlySource }: ResolvedSource,
   idx: number,
 ): [item: any, key: any, index?: number] {
-  const value = needsWrap ? toReactive(values[idx]) : values[idx]
+  const value = needsWrap
+    ? isReadonlySource
+      ? toReadonly(toReactive(values[idx]))
+      : toReactive(values[idx])
+    : values[idx]
   if (keys) {
     return [value, keys[idx], idx]
   } else {

packages/runtime-vapor/src/apiCreateIf.ts

@@ -1,6 +1,10 @@
 import { type Block, type BlockFn, DynamicFragment, insert } from './block'
 import { isHydrating, locateHydrationNode } from './dom/hydration'
-import { insertionAnchor, insertionParent } from './insertionState'
+import {
+  insertionAnchor,
+  insertionParent,
+  resetInsertionState,
+} from './insertionState'
 import { renderEffect } from './renderEffect'
 
 export function createIf(
@@ -13,6 +17,8 @@ export function createIf(
   const _insertionAnchor = insertionAnchor
   if (isHydrating) {
     locateHydrationNode()
+  } else {
+    resetInsertionState()
   }
 
   let frag: Block

packages/runtime-vapor/src/apiTemplateRef.ts

@@ -20,6 +20,7 @@ import {
   isString,
   remove,
 } from '@vue/shared'
+import { DynamicFragment } from './block'
 
 export type NodeRef = string | Ref | ((ref: Element) => void)
 export type RefEl = Element | VaporComponentInstance
@@ -49,7 +50,7 @@ export function setRef(
   if (!instance || instance.isUnmounted) return
 
   const setupState: any = __DEV__ ? instance.setupState || {} : null
-  const refValue = isVaporComponent(el) ? getExposed(el) || el : el
+  const refValue = getRefValue(el)
 
   const refs =
     instance.refs === EMPTY_OBJ ? (instance.refs = {}) : instance.refs
@@ -143,3 +144,12 @@ export function setRef(
   }
   return ref
 }
+
+const getRefValue = (el: RefEl) => {
+  if (isVaporComponent(el)) {
+    return getExposed(el) || el
+  } else if (el instanceof DynamicFragment) {
+    return getRefValue(el.nodes as RefEl)
+  }
+  return el
+}

packages/runtime-vapor/src/component.ts

@@ -25,7 +25,7 @@ import {
   unregisterHMR,
   warn,
 } from '@vue/runtime-dom'
-import { type Block, insert, isBlock, remove } from './block'
+import { type Block, DynamicFragment, insert, isBlock, remove } from './block'
 import {
   type ShallowRef,
   markRaw,
@@ -59,7 +59,11 @@ import {
 } from './componentSlots'
 import { hmrReload, hmrRerender } from './hmr'
 import { isHydrating, locateHydrationNode } from './dom/hydration'
-import { insertionAnchor, insertionParent } from './insertionState'
+import {
+  insertionAnchor,
+  insertionParent,
+  resetInsertionState,
+} from './insertionState'
 
 export { currentInstance } from '@vue/runtime-dom'
 
@@ -142,6 +146,8 @@ export function createComponent(
   const _insertionAnchor = insertionAnchor
   if (isHydrating) {
     locateHydrationNode()
+  } else {
+    resetInsertionState()
   }
 
   // vdom interop enabled and component is not an explicit vapor component
@@ -249,15 +255,17 @@ export function createComponent(
   if (
     instance.hasFallthrough &&
     component.inheritAttrs !== false &&
-    instance.block instanceof Element &&
     Object.keys(instance.attrs).length
   ) {
+    const el = getRootElement(instance)
+    if (el) {
       renderEffect(() => {
         isApplyingFallthroughProps = true
-      setDynamicProps(instance.block as Element, [instance.attrs])
+        setDynamicProps(el, [instance.attrs])
         isApplyingFallthroughProps = false
       })
     }
+  }
 
   resetTracking()
   simpleSetCurrentInstance(prev, instance)
@@ -270,7 +278,7 @@ export function createComponent(
   onScopeDispose(() => unmountComponent(instance), true)
 
   if (!isHydrating && _insertionParent) {
-    insert(instance.block, _insertionParent, _insertionAnchor)
+    mountComponent(instance, _insertionParent, _insertionAnchor)
   }
 
   return instance
@@ -470,6 +478,14 @@ export function createComponentWithFallback(
     return createComponent(comp, rawProps, rawSlots, isSingleRoot)
   }
 
+  const _insertionParent = insertionParent
+  const _insertionAnchor = insertionAnchor
+  if (isHydrating) {
+    locateHydrationNode()
+  } else {
+    resetInsertionState()
+  }
+
   const el = document.createElement(comp)
   // mark single root
   ;(el as any).$root = isSingleRoot
@@ -488,6 +504,10 @@ export function createComponentWithFallback(
     }
   }
 
+  if (!isHydrating && _insertionParent) {
+    insert(el, _insertionParent, _insertionAnchor)
+  }
+
   return el
 }
 
@@ -545,3 +565,18 @@ export function getExposed(
     )
   }
 }
+
+function getRootElement({
+  block,
+}: VaporComponentInstance): Element | undefined {
+  if (block instanceof Element) {
+    return block
+  }
+
+  if (block instanceof DynamicFragment) {
+    const { nodes } = block
+    if (nodes instanceof Element && (nodes as any).$root) {
+      return nodes
+    }
+  }
+}

packages/runtime-vapor/src/componentProps.ts

@@ -21,6 +21,7 @@ import {
   validateProps,
   warn,
 } from '@vue/runtime-dom'
+import { ReactiveFlags } from '@vue/reactivity'
 import { normalizeEmitsOptions } from './componentEmits'
 import { renderEffect } from './renderEffect'
 
@@ -63,6 +64,9 @@ export function getPropsProxyHandlers(
     : YES
 
   const getProp = (instance: VaporComponentInstance, key: string | symbol) => {
+    // this enables direct watching of props and prevents `Invalid watch source` DEV warnings.
+    if (key === ReactiveFlags.IS_REACTIVE) return true
+
     if (!isProp(key)) return
     const rawProps = instance.rawProps
     const dynamicSources = rawProps.$

packages/runtime-vapor/src/componentSlots.ts

@@ -11,7 +11,11 @@ import { rawPropsProxyHandlers } from './componentProps'
 import { currentInstance, isRef } from '@vue/runtime-dom'
 import type { LooseRawProps, VaporComponentInstance } from './component'
 import { renderEffect } from './renderEffect'
-import { insertionAnchor, insertionParent } from './insertionState'
+import {
+  insertionAnchor,
+  insertionParent,
+  resetInsertionState,
+} from './insertionState'
 import { isHydrating, locateHydrationNode } from './dom/hydration'
 
 export type RawSlots = Record<string, VaporSlot> & {
@@ -114,6 +118,8 @@ export function createSlot(
   const _insertionAnchor = insertionAnchor
   if (isHydrating) {
     locateHydrationNode()
+  } else {
+    resetInsertionState()
   }
 
   const instance = i || (currentInstance as VaporComponentInstance)

packages/runtime-vapor/src/dom/prop.ts

@@ -122,7 +122,9 @@ function setClassIncremental(el: any, value: any): void {
   const prev = el[cacheKey]
   if ((value = el[cacheKey] = normalizeClass(value)) !== prev) {
     const nextList = value.split(/\s+/)
+    if (value) {
       el.classList.add(...nextList)
+    }
     if (prev) {
       for (const cls of prev.split(/\s+/)) {
         if (!nextList.includes(cls)) el.classList.remove(cls)

packages/runtime-vapor/src/vdomInterop.ts

@@ -11,10 +11,12 @@ import {
   type Slots,
   type VNode,
   type VaporInteropInterface,
+  createInternalObject,
   createVNode,
   currentInstance,
   ensureRenderer,
   ensureVaporSlotFallback,
+  isEmitListener,
   isVNode,
   onScopeDispose,
   renderSlot,
@@ -186,7 +188,14 @@ function createVDOMComponent(
   // overwrite how the vdom instance handles props
   vnode.vi = (instance: ComponentInternalInstance) => {
     instance.props = wrapper.props
-    instance.attrs = wrapper.attrs
+
+    const attrs = (instance.attrs = createInternalObject())
+    for (const key in wrapper.attrs) {
+      if (!isEmitListener(instance.emitsOptions, key)) {
+        attrs[key] = wrapper.attrs[key]
+      }
+    }
+
     instance.slots =
       wrapper.slots === EMPTY_OBJ
         ? EMPTY_OBJ

packages/server-renderer/__tests__/ssrSlot.spec.ts

@@ -1,4 +1,4 @@
-import { createApp } from 'vue'
+import { createApp, defineAsyncComponent, h } from 'vue'
 import { renderToString } from '../src/renderToString'
 
 const components = {
@@ -154,6 +154,38 @@ describe('ssr: slot', () => {
     ).toBe(`<div><p>1</p><p>2</p></div>`)
   })
 
+  // #12438
+  test('async component slot with v-if true', async () => {
+    const Layout = defineAsyncComponent(() =>
+      Promise.resolve({
+        template: `<div><slot name="header">default header</slot></div>`,
+      }),
+    )
+    const LayoutLoader = {
+      setup(_: any, context: any) {
+        return () => h(Layout, {}, context.slots)
+      },
+    }
+    expect(
+      await renderToString(
+        createApp({
+          components: {
+            LayoutLoader,
+          },
+          template: `
+            <Suspense>
+              <LayoutLoader>
+                <template v-if="true" #header>
+                  new header
+                </template>
+              </LayoutLoader>
+            </Suspense>
+          `,
+        }),
+      ),
+    ).toBe(`<div><!--[--> new header <!--]--></div>`)
+  })
+
   // #11326
   test('dynamic component slot', async () => {
     expect(

packages/server-renderer/__tests__/webStream.spec.ts

@@ -49,7 +49,7 @@ test('pipeToWebWritable', async () => {
   }
 
   const { readable, writable } = new TransformStream()
-  pipeToWebWritable(createApp(App), {}, writable)
+  pipeToWebWritable(createApp(App), {}, writable as any)
 
   const reader = readable.getReader()
   const decoder = new TextDecoder()

packages/server-renderer/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/server-renderer",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "@vue/server-renderer",
   "main": "index.js",
   "module": "dist/server-renderer.esm-bundler.js",

packages/shared/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/shared",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "internal utils shared across @vue packages",
   "main": "index.js",
   "module": "dist/shared.esm-bundler.js",

packages/vue-compat/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/compat",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "Vue 3 compatibility build for Vue 2",
   "main": "index.js",
   "module": "dist/vue.runtime.esm-bundler.js",

packages/vue/__tests__/e2e/TransitionGroup.spec.ts

@@ -647,4 +647,55 @@ describe('e2e: TransitionGroup', () => {
     },
     E2E_TIMEOUT,
   )
+
+  test(
+    'not leaking after children unmounted',
+    async () => {
+      const client = await page().createCDPSession()
+      await page().evaluate(async () => {
+        const { createApp, ref, nextTick } = (window as any).Vue
+        const show = ref(true)
+
+        createApp({
+          components: {
+            Child: {
+              setup: () => {
+                // Big arrays kick GC earlier
+                const test = ref([...Array(3000)].map((_, i) => ({ i })))
+                // @ts-expect-error - Custom property and same lib as runtime is used
+                window.__REF__ = new WeakRef(test)
+
+                return { test }
+              },
+              template: `
+              <p>{{ test.length }}</p>
+            `,
+            },
+          },
+          template: `
+          <transition-group>
+            <Child v-if="show" />
+          </transition-group>
+        `,
+          setup() {
+            return { show }
+          },
+        }).mount('#app')
+
+        show.value = false
+        await nextTick()
+      })
+
+      const isCollected = async () =>
+        // @ts-expect-error - Custom property
+        await page().evaluate(() => window.__REF__.deref() === undefined)
+
+      while ((await isCollected()) === false) {
+        await client.send('HeapProfiler.collectGarbage')
+      }
+
+      expect(await isCollected()).toBe(true)
+    },
+    E2E_TIMEOUT,
+  )
 })

packages/vue/package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue",
-  "version": "3.5.13",
+  "version": "3.5.14",
   "description": "The progressive JavaScript framework for building modern web UI.",
   "main": "index.js",
   "module": "dist/vue.runtime.esm-bundler.js",

pnpm-workspace.yaml

@@ -3,10 +3,25 @@ packages:
   - 'packages-private/*'
 
 catalog:
-  '@babel/parser': ^7.27.0
+  '@babel/parser': ^7.27.2
-  '@babel/types': ^7.27.0
+  '@babel/types': ^7.27.1
   'estree-walker': ^2.0.2
   'vite': ^6.1.0
-  '@vitejs/plugin-vue': https://pkg.pr.new/@vitejs/plugin-vue@c156992
+  '@vitejs/plugin-vue': ^5.2.4
   'magic-string': ^0.30.17
   'source-map-js': ^1.2.1
+
+onlyBuiltDependencies:
+  - '@swc/core'
+  - 'esbuild'
+  - 'puppeteer'
+  - 'simple-git-hooks'
+  - 'unrs-resolver'
+
+peerDependencyRules:
+  allowedVersions:
+    'typescript-eslint>eslint': '^9.0.0'
+    '@typescript-eslint/eslint-plugin>eslint': '^9.0.0'
+    '@typescript-eslint/parser>eslint': '^9.0.0'
+    '@typescript-eslint/type-utils>eslint': '^9.0.0'
+    '@typescript-eslint/utils>eslint': '^9.0.0'