Shimmer Effect
Shimmer Effect
A shimmer effect adds a subtle, moving highlight animation across loading placeholders, giving skeleton screens a polished, dynamic appearance that signals active loading to users.
Installing a Shimmer Library
bash
npm install react-native-shimmer-placeholder react-native-linear-gradient
Basic Shimmer Placeholder
javascript
import ShimmerPlaceholder from 'react-native-shimmer-placeholder';
import LinearGradient from 'react-native-linear-gradient';
const Shimmer = createShimmerPlaceholder(LinearGradient);
Customizing Shimmer Colors
javascript
Building a Custom Shimmer with Reanimated
javascript
const translateX = useSharedValue(-200);
useEffect(() => {
translateX.value = withRepeat(withTiming(200, { duration: 1000 }), -1, false);
}, []);
const shimmerStyle = useAnimatedStyle(() => ({
transform: [{ translateX: translateX.value }],
}));
Combining Shimmer with Skeleton Layouts
Shimmer effects are most commonly applied directly to skeleton placeholder shapes, adding movement to otherwise static gray boxes representing loading content.
Performance Considerations
Shimmer animations should ideally run on the native thread using Reanimated or the native driver to avoid impacting JavaScript thread performance during data loading.
Conclusion
Adding a shimmer effect to loading placeholders significantly enhances the perceived polish and responsiveness of React Native applications, making the loading experience feel more dynamic and professional.
