After creation of React Native application we can see below folder structure.
packages.json
This file contains all dependencies for project.
node_modules
It has all the dependencies and sub-dependencies of our project
index.js
it is starting point for the application
App.js
This will the code willl show on UI
/** * Sample React Native App * https://github.com/facebook/react-native * * @format * @flow strict-local */
import React from 'react'; import { SafeAreaView, StyleSheet, ScrollView, View, Text, StatusBar, } from 'react-native';
import { Header, LearnMoreLinks, Colors, DebugInstructions, ReloadInstructions, } from 'react-native/Libraries/NewAppScreen';
const App: () => React$Node = () => { return ( <> <StatusBar barStyle="dark-content" /> <SafeAreaView> <ScrollView contentInsetAdjustmentBehavior="automatic" style={styles.scrollView}> <Header /> {global.HermesInternal == null ? null : ( <View style={styles.engine}> <Text style={styles.footer}>Engine: Hermes</Text> </View> )} <View style={styles.body}> <View style={styles.sectionContainer}> <Text style={styles.sectionTitle}>Step One</Text> <Text style={styles.sectionDescription}> Edit <Text style={styles.highlight}>App.js</Text> to change this screen and then come back to see your edits. </Text> </View> <View style={styles.sectionContainer}> <Text style={styles.sectionTitle}>See Your Changes</Text> <Text style={styles.sectionDescription}> <ReloadInstructions /> </Text> </View> <View style={styles.sectionContainer}> <Text style={styles.sectionTitle}>Debug</Text> <Text style={styles.sectionDescription}> <DebugInstructions /> </Text> </View> <View style={styles.sectionContainer}> <Text style={styles.sectionTitle}>Learn More</Text> <Text style={styles.sectionDescription}> Read the docs to discover what to do next: </Text> </View> <LearnMoreLinks /> </View> </ScrollView> </SafeAreaView> </> ); };
const styles = StyleSheet.create({ scrollView: { backgroundColor: Colors.lighter, }, engine: { position: 'absolute', right: 0, }, body: { backgroundColor: Colors.white, }, sectionContainer: { marginTop: 32, paddingHorizontal: 24, }, sectionTitle: { fontSize: 24, fontWeight: '600', color: Colors.black, }, sectionDescription: { marginTop: 8, fontSize: 18, fontWeight: '400', color: Colors.dark, }, highlight: { fontWeight: '700', }, footer: { color: Colors.dark, fontSize: 12, fontWeight: '600', padding: 4, paddingRight: 12, textAlign: 'right', }, });
export default App;
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Simple Hello world example
import React from 'react'; import {StyleSheet, Text, View} from 'react-native';
export default class App extends React.Component { render() { return ( <View> <Text>Hello World</Text> </View> ); } }
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