App.tsx

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 *
 * @format
 */

import React, {useState} from 'react';
import {
  Button,
  SafeAreaView,
  ScrollView,
  StatusBar,
  useColorScheme,
} from 'react-native';

import {Colors} from 'react-native/Libraries/NewAppScreen';

function App(): JSX.Element {
  const isDarkMode = useColorScheme() === 'dark';

  const backgroundStyle = {
    backgroundColor: isDarkMode ? Colors.darker : Colors.lighter,
  };

  const [toggle, setToggle] = useState(false);

  return (
    <SafeAreaView style={backgroundStyle}>
      <StatusBar
        barStyle={isDarkMode ? 'light-content' : 'dark-content'}
        backgroundColor={backgroundStyle.backgroundColor}
      />

      <ScrollView
        contentInsetAdjustmentBehavior="automatic"
        style={backgroundStyle}>
        <Button
          title={`Toggle ${toggle}`}
          testID={'toggleButton'}
          onPress={() => {
            setToggle(!toggle);
          }}
        />
      </ScrollView>
    </SafeAreaView>
  );
}
export default App;