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This commit is contained in:
daiwei 2025-07-24 17:42:44 +08:00
parent 87d1e5f028
commit 639fc0baf3
2 changed files with 8 additions and 4 deletions
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6
packages/compiler-core/src/transforms/cacheStatic.ts
View File

@ -219,6 +219,12 @@ function walk(
// #6978, #7138, #7114 // #6978, #7138, #7114
// a cached children array inside v-for can caused HMR errors since // a cached children array inside v-for can caused HMR errors since
// it might be mutated when mounting the first item // it might be mutated when mounting the first item
// #13221
// fix memory leak in cached array:
// cached vnodes get replaced by cloned ones during mountChildren,
// which bind DOM elements. These DOM references persist after unmount,
// preventing garbage collection. Array spread avoids mutating cached
// array, preventing memory leaks.
exp.needArraySpread = true exp.needArraySpread = true
return exp return exp
} }

6
packages/runtime-core/src/vnode.ts
View File

@ -680,9 +680,7 @@ export function cloneVNode<T, U>(
scopeId: vnode.scopeId, scopeId: vnode.scopeId,
slotScopeIds: vnode.slotScopeIds, slotScopeIds: vnode.slotScopeIds,
children: children:
// if vnode is cached, deep clone it's children to prevent cached children __DEV__ && patchFlag === PatchFlags.CACHED && isArray(children)
// from retaining detached DOM nodes
patchFlag === PatchFlags.CACHED && isArray(children)
? (children as VNode[]).map(deepCloneVNode) ? (children as VNode[]).map(deepCloneVNode)
: children, : children,
target: vnode.target, target: vnode.target,
@ -740,7 +738,7 @@ export function cloneVNode<T, U>(
} }
/** /**
* for HMR of hoisted vnodes reused in v-for * Dev only, for HMR of hoisted vnodes reused in v-for
* https://github.com/vitejs/vite/issues/2022 * https://github.com/vitejs/vite/issues/2022
*/ */
function deepCloneVNode(vnode: VNode): VNode { function deepCloneVNode(vnode: VNode): VNode {