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fix(renderer): fix patch error in unstable slot #9202

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fix(renderer): fix patch error in unstable slot #9202

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0f45875
fix(renderer): fix patch error in unstable slot
linghaoSu Sep 13, 2023
3ec274b
test(render): add unit test for rendererFragment
linghaoSu Sep 13, 2023
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4 changes: 3 additions & 1 deletion packages/runtime-core/src/renderer.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1098,7 +1098,9 @@ function baseCreateRenderer(
dynamicChildren &&
// #2715 the previous fragment could've been a BAILed one as a result
// of renderSlot() with no valid children
n1.dynamicChildren
n1.dynamicChildren &&
// #9200 in some case stable fragment in deep unstable slot
n1?.children?.length === n2?.children?.length
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We should avoid using optional chaining #4882 (comment)

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removed optional chaining

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Suggested change
n1?.children?.length === n2?.children?.length
dynamicChildren.length === n1.dynamicChildren.length

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fixed

) {
// a stable fragment (template root or <template v-for>) doesn't need to
// patch children order, but it may contain dynamicChildren.
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