React Native Animated Rolling numbers

✨ react-native-animated-rolling-numbers is a React Native component that animates numbers and compact notations (K, M, B, T) with customizable styles and animations. It's designed to create smooth, eye-catching transitions between numeric values.

readme.mp4

The example shown in the video is available here.

Features

• ✨ Supports animated transitions for numeric values and symbols (e.g., commas, dots).
• 🎨 Customizable digit styles and animation configurations.
• 📏 Handles compact number formatting (e.g., 1K, 1M, etc.).
• 🔧 Easily customizable via props.
• 🌀 Supports reduce-motion and easing functions for animations.
• 🔢 Designed for both regular numbers and formatted numbers with signs (positive/negative) and commas.

Installation

npm install react-native-animated-rolling-numbers
# or
yarn add react-native-animated-rolling-numbers

Make sure you have react-native-reanimated installed in your project. Follow the official installation guide here: react-native-reanimated installation.

Usage

Basic Example

import React, { useState } from "react";
import { View, StyleSheet, Button } from "react-native";
import { AnimatedRollingNumber } from "react-native-animated-rolling-numbers";
import { Easing } from "react-native-reanimated";

const App = () => {
  const [value, setValue] = useState(1200);
  return (
    <View style={styles.container}>
      <AnimatedRollingNumber
        value={value}
        showPlusSign
        showMinusSign
        useGrouping
        enableCompactNotation
        compactToFixed={2}
        textStyle={styles.digits}
        spinningAnimationConfig={{ duration: 500, easing: Easing.bounce }}
      />
      <Button
        onPress={() => setValue(value + Math.floor(Math.random() * 1000))}
        title="Increase"
      />
      <Button
        onPress={() => setValue(value - Math.floor(Math.random() * 1000))}
        title="Decrease"
      />
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: "center",
    alignItems: "center",
  },
  digits: {
    fontSize: 32,
    fontWeight: "bold",
    paddingHorizontal: 2,
    color: "#4A90E2",
  },
});

export default App;

The example shown in the video is available here.

Props

value: number

The numeric value to be displayed and animated.

showSign?: boolean

Whether to show the sign of the number (e.g., "+" or "-"). Defaults to false.

showMinusSign?: boolean

Whether to show the minus sign for negative numbers. Defaults to true.

showPlusSign?: boolean

Whether to show the plus sign for positive numbers. Defaults to false.

toFixed?: number

Number of decimal places to show in normal notation. defaults to undefined.

useGrouping?: boolean

Whether to include commas/points in the number formatting (e.g.,1000987 -> 1,000,987). Defaults to false.

formattedText?: string

Custom formatted text to display instead of the numeric value.

locale?: Intl.LocalesArgument

The locale to use for number formatting. Defaults to "en-US".

enableCompactNotation?: boolean

Enable compact notation for large numbers (e.g., 1K, 1M, 1B, 1T). Defaults to false.

compactToFixed?: number

Number of decimal places to show in compact notation. Defaults to undefined.

fixedOnlyForCompact?: boolean

If true, only applies decimal precision for compact notation (K/M/B/T). Defaults to true.

Example:

• If fixedOnlyForCompact is true and compactToFixed is 2, the number 1500 will be displayed as 1.50K, but the number 999 will be displayed as 999 (no decimal places).
• If fixedOnlyForCompact is false and compactToFixed is 2, the number 1500 will be displayed as 1.50K, and the number 999 will be displayed as 999.00.

containerStyle?: StyleProp<ViewStyle>

Style for the container wrapping the animated digits.

digitContainerStyle?: StyleProp<ViewStyle>

Style for the container wrapping each animated digit.

textProps?: React.ComponentProps<typeof Text>

Props for the main text component.

numberTextProps?: React.ComponentProps<typeof Text>

Props for the numeric text components.

commaTextProps?: React.ComponentProps<typeof Text>

Props for the comma text component.

dotTextProps?: React.ComponentProps<typeof Text>

Props for the decimal point text component.

compactNotationTextProps?: React.ComponentProps<typeof Text>

Props for the compact notation text components (K, M, B, T).

signTextProps?: React.ComponentProps<typeof Text>

Props for the sign text component (if used).

textStyle?: StyleProp<TextStyle>

Style for the main text component.

numberStyle?: StyleProp<TextStyle>

Style for the numeric text components.

commaStyle?: StyleProp<TextStyle>

Style for the comma text component.

dotStyle?: StyleProp<TextStyle>

Style for the decimal point text component.

compactNotationStyle?: StyleProp<TextStyle>

Style for the compact notation text components.

signStyle?: StyleProp<TextStyle>

Style for the sign text component.

spinningAnimationConfig?: object

Configuration for the digit animation. Supports:

• duration: number: Duration of the animation in milliseconds.
• reduceMotion: boolean: Whether to reduce motion for accessibility.
• easing: EasingFunction: Custom easing function for the animation.

animationCallback?: AnimationCallback

Callback function that is invoked when the animation completes.

animateToNewValue?: (newValue: number, variant?: DigitVariant) => number

Custom function to animate the value change. Defaults to a bounce animation.

If you find this project useful and would like to support its ongoing development, consider buying me a coffee! Your support helps keep the creativity brewing and allows me to continue improving and maintaining this project. Thank you! ☕💖