React Native (Expo) animations — Reanimated v4 + Gesture Handler

Defaults (pick these unless there’s a reason not to)

1. Simple state change (hover/pressed/toggled, small style changes): use Reanimated CSS Transitions.
2. Mount/unmount + layout changes (lists, accordions, reflow): use Reanimated Layout Animations.
3. Interactive / per-frame (gestures, scroll, physics, drag): use Shared Values + worklets (UI thread).

If an existing codebase already uses a different pattern, stay consistent and only migrate when necessary.

Quick start

Install (Expo)

npx expo install react-native-reanimated react-native-worklets react-native-gesture-handler