fix(compiler-core): always track KeepAlive children as block inside v-for

edison1105 · edison1105 · commit ad243e7dff53 · 2025-02-19T22:01:35.000+08:00
diff --git a/packages/compiler-core/src/transforms/vFor.ts b/packages/compiler-core/src/transforms/vFor.ts
@@ -42,6 +42,7 @@ import {
 import {
   FRAGMENT,
   IS_MEMO_SAME,
+  KEEP_ALIVE,
   OPEN_BLOCK,
   RENDER_LIST,
 } from '../runtimeHelpers'
@@ -208,7 +209,9 @@ export const transformFor: NodeTransform = createStructuralDirectiveTransform(
               )
             }
           }
-          childBlock.isBlock = !isStableFragment
+          // always track KeepAlive children as block
+          childBlock.isBlock =
+            childBlock.tag === KEEP_ALIVE || !isStableFragment
           if (childBlock.isBlock) {
             helper(OPEN_BLOCK)
             helper(getVNodeBlockHelper(context.inSSR, childBlock.isComponent))

Original file line number	Diff line number	Diff line change
`@@ -42,6 +42,7 @@ import {`
`42`	`42`	`import {`
`43`	`43`	`FRAGMENT,`
`44`	`44`	`IS_MEMO_SAME,`
	`45`	`+ KEEP_ALIVE,`
`45`	`46`	`OPEN_BLOCK,`
`46`	`47`	`RENDER_LIST,`
`47`	`48`	`} from '../runtimeHelpers'`
`@@ -208,7 +209,9 @@ export const transformFor: NodeTransform = createStructuralDirectiveTransform(`
`208`	`209`	`)`
`209`	`210`	`}`
`210`	`211`	`}`
`211`		`- childBlock.isBlock = !isStableFragment`
	`212`	`+ // always track KeepAlive children as block`
	`213`	`+ childBlock.isBlock =`
	`214`	`+ childBlock.tag === KEEP_ALIVE \|\| !isStableFragment`
`212`	`215`	`if (childBlock.isBlock) {`
`213`	`216`	`helper(OPEN_BLOCK)`
`214`	`217`	`helper(getVNodeBlockHelper(context.inSSR, childBlock.isComponent))`