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fix(v-memo): ensure track block when returning cached vnode (#4270)

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fix #4253
This commit is contained in:
edison
2021-08-07 09:44:45 +08:00
committed by GitHub
parent 3b60358d0e
commit a211e271ee
3 changed files with 12 additions and 10 deletions
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16
packages/runtime-core/src/helpers/withMemo.ts
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@@ -7,11 +7,7 @@ export function withMemo(
index: number
) {
const cached = cache[index] as VNode | undefined
if (cached && isMemoSame(cached.memo!, memo)) {
// make sure to let parent block track it when returning cached
if (isBlockTreeEnabled > 0 && currentBlock) {
currentBlock.push(cached)
}
if (cached && isMemoSame(cached, memo)) {
return cached
}
const ret = render()
@@ -19,11 +15,17 @@ export function withMemo(
return (cache[index] = ret)
}
export function isMemoSame(prev: any[], next: any[]) {
export function isMemoSame(cached: VNode, memo: any[]) {
const prev: any[] = cached.memo!
for (let i = 0; i < prev.length; i++) {
if (prev[i] !== next[i]) {
if (prev[i] !== memo[i]) {
return false
}
}
// make sure to let parent block track it when returning cached
if (isBlockTreeEnabled > 0 && currentBlock) {
currentBlock.push(cached)
}
return true
}