Certainly! Below is a simple documentation for the provided React Native counter app:

React Native Counter App Documentation

Overview

This is a simple React Native application that implements a basic counter functionality. Users can increment or decrement the counter value by pressing the corresponding buttons.

Components

App Component

The main component of the application. It manages the state of the counter and renders the UI elements.

State

counter: Holds the current value of the counter.

Methods

handleIncrement: Increments the counter value by 1.
handleDecrement: Decrements the counter value by 1.

Rendered UI

Title: Displays the title of the app ("Counter App").
Counter Display: Shows the current value of the counter.
Buttons: Two buttons, one for incrementing (+) and the other for decrementing (-) the counter.

Styles

The stylesheet (styles) defines the visual appearance of the components.

container: Styles for the main container.
title: Styles for the title text.
counter: Styles for the counter value text.
buttonContainer: Styles for the container of the buttons.
button: Styles for the buttons.
buttonText: Styles for the text inside the buttons.

Usage

Install dependencies: npm install or yarn install.
Run the application: npm start or yarn start.
Open the app on an emulator or a physical device.

Styling

The application features a clean and visually appealing design with a light background color. The buttons are styled with a bold color to make them stand out. Feel free to customize the styles in the styles object to match your preferences.

import React, { useState } from 'react'; import { StyleSheet, Text, View, TouchableOpacity } from 'react-native'; const App = () => { const [counter, setCounter] = useState(0); const handleIncrement = () => { setCounter(counter + 1); }; const handleDecrement = () => { setCounter(counter - 1); }; return ( <View style={styles.container}> <Text style={styles.title}>Counter App</Text> <Text style={styles.counter}>{counter}</Text> <View style={styles.buttonContainer}> <TouchableOpacity style={styles.button} onPress={handleIncrement}> <Text style={styles.buttonText}>+</Text> </TouchableOpacity> <TouchableOpacity style={styles.button} onPress={handleDecrement}> <Text style={styles.buttonText}>-</Text> </TouchableOpacity> </View> </View> ); }; const styles = StyleSheet.create({ container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#f5f5f5', }, title: { fontSize: 36, fontWeight: 'bold', marginBottom: 20, }, counter: { fontSize: 48, fontWeight: 'bold', marginBottom: 20, }, buttonContainer: { flexDirection: 'row', }, button: { backgroundColor: '#3498db', paddingVertical: 15, paddingHorizontal: 30, margin: 10, borderRadius: 10, }, buttonText: { color: 'white', fontSize: 24, fontWeight: 'bold', }, }); export default App;

Counter App using React Native