This React Native app saves the dark mode and light mode and changes app theme

A React Native library to easily implement dark and light themes in your app.

Installation

npm install react-native-lightdarkthemes

or

yarn add react-native-lightdarkthemes

Usage

First, wrap your root component with the ThemeProvider from react-native-lightdarkthemes:

import React from 'react';
import { ThemeProvider } from 'react-native-lightdarkthemes';
import App from './App';

const Root = () => {
  return (
    <ThemeProvider>
      <App />
    </ThemeProvider>
  );
};

export default Root;

Accessing Theme and Toggling

In your components, you can use the useTheme hook to access the current theme and toggle between dark and light modes.

import React from 'react';
import { View, Text, Switch } from 'react-native';
import { useTheme } from 'react-native-lightdarkthemes';

const Settings = () => {
  const { isDarkMode, toggleTheme } = useTheme();

  return (
    <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: isDarkMode ? '#000' : '#FFF' }}>
      <Text style={{ color: isDarkMode ? '#FFF' : '#000' }}>
        {isDarkMode ? 'Dark Mode' : 'Light Mode'}
      </Text>
      <Switch
        trackColor={{ false: "#37B7C3", true: "#91DDCF" }}
        thumbColor={isDarkMode ? "#088395" : "#f4f3f4"}
        onValueChange={toggleTheme}
        value={isDarkMode}
      />
    </View>
  );
};

export default Settings;

Custom Styles

You can define custom styles for both dark and light modes and switch between them based on the current theme.

import React from 'react';
import { View, Text, StyleSheet, Button } from 'react-native';
import { useTheme } from 'react-native-lightdarkthemes';

const HomeScreen = () => {
  const { isDarkMode, toggleTheme } = useTheme();
  const styles = isDarkMode ? darkStyles : lightStyles;

  return (
    <View style={styles.container}>
      <Text style={styles.text}>
        {isDarkMode ? 'Dark Mode' : 'Light Mode'}
      </Text>
    </View>
  );
};

const lightStyles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  text: {
    fontSize: 18,
    color: '#000',
  },
});

const darkStyles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#000',
  },
  text: {
    fontSize: 18,
    color: '#FFF',
  },
});

export default HomeScreen;

API

useTheme

A hook to access the current theme and toggle function.

Returns

• isDarkMode (boolean): Indicates whether the dark mode is active.
• toggleTheme (function): A function to toggle between dark and light modes.

ThemeProvider

A component to provide the theme context to your app.