react-native-reorderable-list/src/hooks/useReorderableDragStart.ts

Reorderable list for React Native applications, powered by Reanimated

import {useAnimatedReaction} from 'react-native-reanimated';

import {useContext} from './useContext';
import {ReorderableCellContext} from '../contexts';

export const useReorderableDragStart = (onStart: (index: number) => void) => {
  const {draggedIndex, index} = useContext(ReorderableCellContext);

  useAnimatedReaction(
    () => draggedIndex.value === index,
    newValue => {
      if (newValue && onStart) {
        onStart(index);
      }
    },
    [onStart],
  );
};