khadinakbarlabs/expo-mobile-app-builder/add-reanimated

Claude Code and agent skill by khadinakbarlabs/expo-mobile-app-builder

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Add Reanimated 4 for spring animations, gestures, shared element transitions. Use when the user says 'animations', 'Reanimated', 'spring animation', 'gesture handler', 'shared element'.

Install

npx vskill@latest install khadinakbarlabs/expo-mobile-app-builder/add-reanimated

SKILL.md

Add Reanimated

React Native Reanimated 4 (stable July 2025, New Architecture only). CSS-style declarative animations + worklets.

Install

bash
npm exec --no -- expo install react-native-reanimated react-native-gesture-handler react-native-worklets

Add to babel.config.js:

js
module.exports = function(api) {
api.cache(true);
return {
presets: ['babel-preset-expo'],
plugins: ['react-native-worklets/plugin'], // MUST be last
};
};

Spring animation

tsx
import Animated, { useSharedValue, useAnimatedStyle, withSpring } from 'react-native-reanimated';
function HeartButton() {
const scale = useSharedValue(1);
const animatedStyle = useAnimatedStyle(() => ({
transform: [{ scale: scale.value }],
}));
const handlePress = () => {
scale.value = withSpring(1.4, { damping: 8 }, () => {
scale.value = withSpring(1);
});
};
return (
<Pressable onPress={handlePress}>
<Animated.View style={animatedStyle}>
<Image source={require('./heart.png')} />
</Animated.View>
</Pressable>
);
}

Gesture

tsx
import { GestureDetector, Gesture } from 'react-native-gesture-handler';
const drag = Gesture.Pan().onUpdate((e) => {
translateX.value = e.translationX;
}).onEnd(() => {
translateX.value = withSpring(0);
});
<GestureDetector gesture={drag}>
<Animated.View style={[styles.card, animatedStyle]} />
</GestureDetector>

Reduce Motion respect

tsx
import { AccessibilityInfo } from 'react-native';
const reduceMotion = await AccessibilityInfo.isReduceMotionEnabled();
scale.value = reduceMotion ? withTiming(1.4, { duration: 0 }) : withSpring(1.4);

Reference

references/01-expo-sdk-54.md

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Source

Popularity

Repository stars
3
Repository forks
1
7-day trend score
7

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