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Add Placement bit without removing others #20398

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merged 1 commit into from Dec 7, 2020
Merged

Add Placement bit without removing others #20398

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6 changes: 3 additions & 3 deletions packages/react-reconciler/src/ReactChildFiber.new.js
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Expand Up @@ -342,15 +342,15 @@ function ChildReconciler(shouldTrackSideEffects) {
const oldIndex = current.index;
if (oldIndex < lastPlacedIndex) {
// This is a move.
newFiber.flags = Placement;
newFiber.flags |= Placement;
return lastPlacedIndex;
} else {
// This item can stay in place.
return oldIndex;
}
} else {
// This is an insertion.
newFiber.flags = Placement;
newFiber.flags |= Placement;
return lastPlacedIndex;
}
}
Expand All @@ -359,7 +359,7 @@ function ChildReconciler(shouldTrackSideEffects) {
// This is simpler for the single child case. We only need to do a
// placement for inserting new children.
if (shouldTrackSideEffects && newFiber.alternate === null) {
newFiber.flags = Placement;
newFiber.flags |= Placement;
}
return newFiber;
}
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6 changes: 3 additions & 3 deletions packages/react-reconciler/src/ReactChildFiber.old.js
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Expand Up @@ -342,15 +342,15 @@ function ChildReconciler(shouldTrackSideEffects) {
const oldIndex = current.index;
if (oldIndex < lastPlacedIndex) {
// This is a move.
newFiber.flags = Placement;
newFiber.flags |= Placement;
return lastPlacedIndex;
} else {
// This item can stay in place.
return oldIndex;
}
} else {
// This is an insertion.
newFiber.flags = Placement;
newFiber.flags |= Placement;
return lastPlacedIndex;
}
}
Expand All @@ -359,7 +359,7 @@ function ChildReconciler(shouldTrackSideEffects) {
// This is simpler for the single child case. We only need to do a
// placement for inserting new children.
if (shouldTrackSideEffects && newFiber.alternate === null) {
newFiber.flags = Placement;
newFiber.flags |= Placement;
}
return newFiber;
}
Expand Down