How to Add a Blur Effect in React Native Using @react-native-community/blur

Use the @react-native-community/blur library to render a native BlurView component with configurable blurType and blurAmount props, positioning it absolutely over your content to achieve a Gaussian blur effect on both iOS and Android.

React Native does not ship with a built-in visual blur component, but you can achieve a blur effect in React Native by leveraging the community-maintained @react-native-community/blur package. This library exposes a native BlurView that renders platform-specific Gaussian blur using iOS's UIVisualEffectView and Android's RenderScript. Under the hood, React Native treats this as a host component, forwarding props across the bridge using the same architecture defined in the React repository's renderer implementation.

Installation and Setup

Install the package using your preferred package manager:

# Using npm

npm install @react-native-community/blur

# Using Yarn

yarn add @react-native-community/blur

For React Native 0.60 and above, the library auto-links. If you are using an older version, follow the manual linking instructions in the library's README. No additional permissions are required to use the blur functionality.

Core Architecture and the Native Bridge

Understanding how React Native handles the blur effect requires examining how host components communicate across the JavaScript-to-native bridge. When you render a <BlurView>, React creates a host component that forwards props (blurType, blurAmount, etc.) to the native view manager.

According to the React source code in [packages/react-native-renderer/src/ReactNativeFiberHostComponent.js](https://github.com/facebook/react/blob/main/packages/react-native-renderer/src/ReactNativeFiberHostComponent.js#L50-L52), host components expose a generic blur() method:

// From ReactNativeFiberHostComponent.js lines 50-52
blur() {
  TextInputState.blurTextInput(this._nativeTag);
}

This method is distinct from the visual blur effect provided by @react-native-community/blur. It is used to programmatically dismiss focus from text inputs. However, both mechanisms rely on the same host component architecture defined in [packages/react-native-renderer/src/ReactNativeRenderer.js](https://github.com/facebook/react/blob/main/packages/react-native-renderer/src/ReactNativeRenderer.js) and the component tree management in [packages/react-native-renderer/src/ReactNativeComponentTree.js](https://github.com/facebook/react/blob/main/packages/react-native-renderer/src/ReactNativeComponentTree.js).

The native implementation receives blur configuration and renders:

• iOS: UIVisualEffectView with UIBlurEffect
• Android: RenderScript or RenderEffect based blur

Basic Implementation

To create a blur overlay, position the BlurView absolutely over your content using StyleSheet.absoluteFillObject:

import React from 'react';
import { StyleSheet, View, Image, Text } from 'react-native';
import { BlurView } from '@react-native-community/blur';

export default function BlurOverlay() {
  return (
    <View style={styles.container}>
      <Image
        source={require('./assets/background.jpg')}
        style={StyleSheet.absoluteFill}
        resizeMode="cover"
      />
      
      <BlurView
        style={styles.absolute}
        blurType="light"
        blurAmount={10}
        reducedTransparencyFallbackColor="white"
      />
      
      <View style={styles.content}>
        <Text style={styles.text}>Content Over Blur</Text>
      </View>
    </View>
  );
}

const styles = StyleSheet.create({
  container: { flex: 1 },
  absolute: {
    ...StyleSheet.absoluteFillObject,
  },
  content: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
  text: { fontSize: 24, color: '#fff' },
});

Key Props

• blurType: Determines the visual style. Options include "light", "dark", "xlight" (iOS) or "extraLight" (Android).
• blurAmount: Controls intensity from 0 to 25. Higher values create stronger blur.
• reducedTransparencyFallbackColor: Solid color displayed when the user has enabled "Reduce Transparency" accessibility settings.

Animated Blur Effects

You can animate the blurAmount prop using React Native's Animated API. Since blurAmount accepts numeric values, it integrates seamlessly with interpolation:

import React, { useRef, useEffect } from 'react';
import { View, StyleSheet, Animated, Easing } from 'react-native';
import { BlurView } from '@react-native-community/blur';

export default function AnimatedBlur() {
  const blurAnim = useRef(new Animated.Value(0)).current;

  useEffect(() => {
    Animated.loop(
      Animated.timing(blurAnim, {
        toValue: 20,
        duration: 3000,
        easing: Easing.inOut(Easing.quad),
        useNativeDriver: false, // blurAmount requires JS driver
      })
    ).start();
  }, [blurAnim]);

  return (
    <View style={styles.container}>
      <AnimatedBlurView blurAmount={blurAnim} />
    </View>
  );
}

function AnimatedBlurView({ blurAmount }: { blurAmount: Animated.AnimatedValue }) {
  return (
    <BlurView
      style={StyleSheet.absoluteFill}
      blurType="light"
      blurAmount={blurAmount}
    />
  );
}

const styles = StyleSheet.create({
  container: { flex: 1 },
});

Important: Set useNativeDriver: false when animating blurAmount because the blur prop requires JavaScript-driven updates to re-render the native view.

Platform Limitations and Considerations

Platform	Support	Implementation Details
iOS	Full	Uses native UIVisualEffectView with UIBlurEffectStyle constants. Supports light, dark, extraDark, regular, and prominent blur types.
Android	Full	Uses RenderScript on older versions and RenderEffect on Android 12+. Supports light, dark, and extraLight styles.
Web	Not supported	The library does not support React Native Web. Use CSS backdrop-filter: blur() as an alternative for web platforms.

When the user enables "Reduce Transparency" in iOS accessibility settings, the reducedTransparencyFallbackColor prop ensures your UI remains usable by displaying a solid color instead of the blur effect.

Testing Blur Components

The React repository includes tests that verify the host component blur() method functionality in [packages/react-native-renderer/src/__tests__/ReactNativeMount-test.internal.js](https://github.com/facebook/react/blob/main/packages/react-native-renderer/src/__tests__/ReactNativeMount-test.internal.js#L737-L751):

// Test excerpt from ReactNativeMount-test.internal.js lines 737-751
it('should call blur() on the native component', () => {
  const viewRef = React.createRef();
  ReactNative.render(<View ref={viewRef} />, 1);
  
  // Calls the blur method defined in ReactNativeFiberHostComponent.js
  viewRef.current.blur();
  
  expect(TextInputState.blurTextInput).toHaveBeenCalled();
});

For testing your actual BlurView implementation, use @testing-library/react-native with mocked native modules:

import { render } from '@testing-library/react-native';
import { BlurView } from '@react-native-community/blur';

jest.mock('@react-native-community/blur', () => ({
  BlurView: 'BlurView',
}));

test('renders blur view with correct props', () => {
  const { getByTestId } = render(
    <BlurView 
      testID="blur" 
      blurType="dark" 
      blurAmount={10} 
    />
  );
  
  expect(getByTestId('blur').props.blurType).toBe('dark');
});

Summary

• Install @react-native-community/blur to add native blur capabilities to your React Native app.
• Position the BlurView absolutely using StyleSheet.absoluteFillObject to create overlay effects.
• Configure the blur using blurType (style) and blurAmount (intensity 0-25), with reducedTransparencyFallbackColor for accessibility.
• Understand that React Native treats BlurView as a host component, forwarding props across the bridge via the same architecture defined in ReactNativeFiberHostComponent.js and ReactNativeRenderer.js.
• Animate blur effects using React Native's Animated API with useNativeDriver: false.
• Test your implementation using mocked native modules or snapshot testing.

Frequently Asked Questions

What is the difference between the visual blur effect and the blur() method in React Native?

The visual blur effect provided by @react-native-community/blur renders a Gaussian blur overlay using native platform APIs like iOS's UIVisualEffectView. In contrast, the blur() method defined in ReactNativeFiberHostComponent.js (lines 50-52) is a programmatic API used to remove focus from text inputs, calling TextInputState.blurTextInput on the native tag.

Can I use @react-native-community/blur with React Native Web?

No, the library does not support React Native Web. For web platforms, implement blur effects using CSS backdrop-filter: blur() or standard CSS filters instead. The native module architecture used by the blur library depends on iOS and Android-specific rendering engines.

How do I handle accessibility settings that disable transparency?

Use the reducedTransparencyFallbackColor prop on your BlurView. When users enable "Reduce Transparency" in iOS accessibility settings (or equivalent Android settings), the component automatically renders the specified solid color instead of the blur effect, ensuring your UI remains accessible and readable.

Why must I set useNativeDriver to false when animating blurAmount?

The blurAmount prop requires JavaScript-driven updates to re-render the native view with new blur intensity values. Native drivers cannot animate this property because the blur calculation happens on the native side based on the prop value passed from JavaScript. Set useNativeDriver: false in your Animated.timing configuration when animating blur effects.

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}