npm install theme-csx

yarn add theme-csx

import { useState } from 'react';

// Styles
import { StyleSheet, appearanceHook, t} from "theme-csx";

// Components 
import { Text, View } from 'react-native';
import { Button } from '@components/atoms';

const DemoComponent = () => {

// Theme state
const [theme, setTheme] = useState(appearanceHook.activeTheme)

// Theme switch
const switchTheme = () => {
   appearanceHook.switch(appearanceHook.activeTheme === 'dark' ? 'light' : 'dark')
   setTheme(theme === 'dark' ? 'light' : 'dark')
}

return (
   <View style={t(styles.THEMED_CONTAINER)}>

      <Text style={styles.NORMAL_TEXT}>Hey, I am normal text</Text>

      <Text style={t(styles.THEMED_TEXT)}>Hey, I am themed text</Text>

      <Button text={'Switch theme'} onPress={switchTheme} />

   </View>
)}


const styles = StyleSheet.create({
    THEMED_CONTAINER: {
    flex: 1,
    backgroundColor: 'white',
    backgroundDark: 'gray',
    alignItems: 'center',
    justifyContent: 'center',
   },
   NORMAL_TEXT: {
   fontWeight: 'bold',
   fontSize: 14,
   color: 'green',
   },
   THEMED_TEXT: {
   fontWeight: 'bold',
   fontSize: 14,
   color: 'black',
   colorDark: 'white'
   },
})