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fix: add mergedData length check #306

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Merged
zombieJ merged 2 commits into from
Feb 28, 2025
Merged

fix: add mergedData length check #306

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2f78a02
fix: add mergedData length check
hakankosdag Feb 28, 2025
eb4f6e5
chore: check first
zombieJ Feb 28, 2025
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18 changes: 11 additions & 7 deletions src/List.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -279,13 +279,17 @@ export function RawList<T>(props: ListProps<T>, ref: React.Ref<ListRef>) {
const changedRecord = heights.getRecord();
if (changedRecord.size === 1) {
const recordKey = Array.from(changedRecord)[0];
const startIndexKey = getKey(mergedData[start]);
if (startIndexKey === recordKey) {
const realStartHeight = heights.get(recordKey);
const diffHeight = realStartHeight - itemHeight;
syncScrollTop((ori) => {
return ori + diffHeight;
});
// Quick switch data may cause `start` not in `mergedData` anymore
const startItem = mergedData[start];
if (startItem) {
const startIndexKey = getKey(startItem);
if (startIndexKey === recordKey) {
const realStartHeight = heights.get(recordKey);
const diffHeight = realStartHeight - itemHeight;
syncScrollTop((ori) => {
return ori + diffHeight;
});
}
}
}

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