@quidone/react-native-wheel-picker/src/base/picker/hooks/useSyncScrollEffect.ts

Picker is a UI component for selecting an item from a list of options.

import {type RefObject, useEffect} from 'react';
import type {ListMethods} from '../../types';
const useSyncScrollEffect = ({
  listRef,
  valueIndex,
  activeIndexRef,
  touching,
}: {
  listRef: RefObject<ListMethods>;
  valueIndex: number;
  activeIndexRef: RefObject<number>;
  touching: boolean;
}) => {
  useEffect(() => {
    if (
      listRef.current == null ||
      touching ||
      activeIndexRef.current === valueIndex
    ) {
      return;
    }
    listRef.current.scrollToIndex({
      index: valueIndex,
      animated: true,
    });
  }, [valueIndex]); // eslint-disable-line react-hooks/exhaustive-deps
};
export default useSyncScrollEffect;