1---
2title: Animation
3description: Learn how to integrate the react-native-reanimated library and use it in your Expo project.
4---
5
6import { Terminal, SnackInline } from '~/ui/components/Snippet';
7import { BoxLink } from '~/ui/components/BoxLink';
8
9Animations are a great way to enhance and provide a better user experience. In your Expo projects, you can use the [Animated API](https://reactnative.dev/docs/next/animations) from React Native. However, if you want to use more advanced animations with better performance, you can use the [`react-native-reanimated`](https://docs.swmansion.com/react-native-reanimated/) library. It provides an API that simplifies the process of creating smooth, powerful, and maintainable animations.
10
11## Installation
12
13To install `react-native-reanimated`, run the following command:
14
15<Terminal cmd={['$ npx expo install react-native-reanimated']} />
16
17After the installation completes, add the Babel plugin to **babel.config.js**:
18
19```js babel.config.js
20module.exports = function (api) {
21  api.cache(true);
22  return {
23    presets: ['babel-preset-expo'],
24    plugins: ['react-native-reanimated/plugin'],
25  };
26};
27```
28
29After you add the Babel plugin, restart your development server and clear the bundler cache using `npx expo start --clear`.
30
31> If you load other Babel plugins, the Reanimated plugin has to be the last item in the plugins array.
32
33### Web support
34
35**For web**, install the [`@babel/plugin-proposal-export-namespace-from`](https://babeljs.io/docs/en/babel-plugin-proposal-export-namespace-from#installation) Babel plugin and update the **babel.config.js** to load it:
36
37{/* prettier-ignore */}
38```js babel.config.js
39plugins: [
40  '@babel/plugin-proposal-export-namespace-from',
41  'react-native-reanimated/plugin',
42],
43```
44
45After you add the Babel plugin, restart your development server and clear the bundler cache using `npx expo start --clear`.
46
47## Minimal example
48
49The following example shows how to use the `react-native-reanimated` library to create a simple animation. For more information on the API and its usage, see [**`react-native-reanimated` documentation**](https://docs.swmansion.com/react-native-reanimated/docs/).
50
51<SnackInline label="Using react-native-reanimated" dependencies={['react-native-reanimated']}>
52
53{/* prettier-ignore */}
54```jsx
55import Animated, {
56  useSharedValue,
57  withTiming,
58  useAnimatedStyle,
59  Easing,
60} from 'react-native-reanimated';
61import { View, Button, StyleSheet } from 'react-native';
62
63export default function AnimatedStyleUpdateExample() {
64  const randomWidth = useSharedValue(10);
65
66  const config = {
67    duration: 500,
68    easing: Easing.bezier(0.5, 0.01, 0, 1),
69  };
70
71  const style = useAnimatedStyle(() => {
72    return {
73      width: withTiming(randomWidth.value, config),
74    };
75  });
76
77  return (
78    <View style={styles.container}>
79      <Animated.View style={[styles.box, style]} />
80      <Button
81        title="toggle"
82        onPress={() => {
83          randomWidth.value = Math.random() * 350;
84        }}
85      />
86    </View>
87  );
88}
89
90const styles = StyleSheet.create({
91  container: {
92    flex: 1,
93    alignItems: 'center',
94    justifyContent: 'center',
95    flexDirection: 'column',
96  },
97  box: {
98    width: 100,
99    height: 80,
100    backgroundColor: 'black',
101    margin: 30,
102  },
103});
104```
105
106</SnackInline>
107
108### Other animation libraries
109
110Other animation packages are available, such as Moti, that you also use in your Expo project and work on Android, iOS, and the web. For more information on its API and usage, see [Moti's documentation](https://moti.fyi/).
111
112## Next step
113
114<BoxLink
115  title="Store data"
116  description="Learn about different libraries available to store data in your app."
117  href="/develop/user-interface/store-data"
118/>
119