Smooth UI Transitions with InteractionManager in React Native

Insight

When a screen change triggers a heavy computation—such as parsing a large JSON payload or pre‑loading images—the UI can stutter because the JavaScript thread is busy during the transition animation. InteractionManager lets you schedule work after all ongoing interactions (animations, gestures) have settled, freeing the UI thread for a fluid experience.

Example

import { InteractionManager, useEffect, useState } from 'react';
import { View, Text, ActivityIndicator } from 'react-native';

export default function DetailScreen({ route }) {
  const [data, setData] = useState(null);

  useEffect(() => {
    // Run heavy parsing after the navigation animation completes
    const task = InteractionManager.runAfterInteractions(() => {
      const parsed = JSON.parse(route.params.rawJson);
      setData(parsed);
    });
    return () => task.cancel();
  }, [route.params.rawJson]);

  return (
    <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
      {data ? <Text>{data.title}</Text> : <ActivityIndicator />}
    </View>
  );
}

Takeaway

Wrap any non‑essential, CPU‑intensive logic in InteractionManager.runAfterInteractions to keep navigation animations buttery smooth. Remember to cancel the task on unmount to avoid memory leaks.