fix(runtime-vapor): reset insertion state to avoid duplicate block inserts during non-hydration

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

@@ -211,38 +211,42 @@ color: red
     expect(
       compileScoped(`.div { color: red; } .div:where(:hover) { color: blue; }`),
     ).toMatchInlineSnapshot(`
-    ".div[data-v-test] { color: red;
-    }
-    .div[data-v-test]:where(:hover) { color: blue;
-    }"`)
+      ".div[data-v-test] { color: red;
+      }
+      .div[data-v-test]:where(:hover) { color: blue;
+      }"
+    `)
 
     expect(
       compileScoped(`.div { color: red; } .div:is(:hover) { color: blue; }`),
     ).toMatchInlineSnapshot(`
-    ".div[data-v-test] { color: red;
-    }
-    .div[data-v-test]:is(:hover) { color: blue;
-    }"`)
+      ".div[data-v-test] { color: red;
+      }
+      .div[data-v-test]:is(:hover) { color: blue;
+      }"
+    `)
 
     expect(
       compileScoped(
         `.div { color: red; } .div:where(.foo:hover) { color: blue; }`,
       ),
     ).toMatchInlineSnapshot(`
-    ".div[data-v-test] { color: red;
-    }
-    .div[data-v-test]:where(.foo:hover) { color: blue;
-    }"`)
+      ".div[data-v-test] { color: red;
+      }
+      .div[data-v-test]:where(.foo:hover) { color: blue;
+      }"
+    `)
 
     expect(
       compileScoped(
         `.div { color: red; } .div:is(.foo:hover) { color: blue; }`,
       ),
     ).toMatchInlineSnapshot(`
-    ".div[data-v-test] { color: red;
-    }
-    .div[data-v-test]:is(.foo:hover) { color: blue;
-    }"`)
+      ".div[data-v-test] { color: red;
+      }
+      .div[data-v-test]:is(.foo:hover) { color: blue;
+      }"
+    `)
   })
 
   test('media query', () => {

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
@@ -152,7 +152,7 @@ export function genEffect(
   return frag
 }
 
-function genInsertionstate(
+function genInsertionState(
   operation: InsertionStateTypes,
   context: CodegenContext,
 ): CodeFragment[] {

packages/runtime-vapor/src/apiCreateFor.ts

@@ -23,7 +23,11 @@ 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
@@ -72,6 +76,8 @@ export const createFor = (
   const _insertionAnchor = insertionAnchor
   if (isHydrating) {
     locateHydrationNode()
+  } else {
+    resetInsertionState()
   }
 
   let isMounted = false

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/component.ts

@@ -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

packages/runtime-vapor/src/componentSlots.ts

@@ -4,7 +4,11 @@ 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> & {
@@ -96,6 +100,8 @@ export function createSlot(
   const _insertionAnchor = insertionAnchor
   if (isHydrating) {
     locateHydrationNode()
+  } else {
+    resetInsertionState()
   }
 
   const instance = currentInstance as VaporComponentInstance

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()