React Native with and without StyleSheet

AnElement.js

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

const styleObject = { fontSize: 24 };
const styles = StyleSheet({
  textStyle: styleObject,
});

const AnElement = () => (
  <View>
    <Text style={styleObject}>Hi!</Text>
    <Text style={styles.textStyle}>Hi too!</Text>
  </View>
);