React Native vs Flutter

Syntax

React Native:

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

function App() {
  return (
    <View>
      <Text>Hello, world!</Text>
    </View>
  );
}

export default App;

Flutter:

import 'package:flutter/material.dart';

void main() {
  runApp(
    MaterialApp(
      home: Scaffold(
        body: Center(
          child: Text('Hello, world!'),
        ),
      ),
    ),
  );
}

Example

Here's an example of a simple login form UI implemented in React Native:

import React, { useState } from 'react';
import { TextInput, Button, View, StyleSheet } from 'react-native';

function LoginForm() {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');

  const handleSubmit = () => {
    // Handle login logic
  };

  return (
    <View style={styles.container}>
      <TextInput
        style={styles.input}
        placeholder="Email"
        value={email}
        onChangeText={setEmail}
      />
      <TextInput
        style={styles.input}
        placeholder="Password"
        secureTextEntry
        value={password}
        onChangeText={setPassword}
      />
      <Button title="Login" onPress={handleSubmit} />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
  },
  input: {
    margin: 8,
    padding: 8,
    borderWidth: 1,
    borderColor: '#ccc',
    borderRadius: 4,
    width: '80%',
    maxWidth: 500,
  },
});

export default LoginForm;

And here's the equivalent implementation in Flutter:

import 'package:flutter/material.dart';

class LoginForm extends StatefulWidget {
  @override
  _LoginFormState createState() => _LoginFormState();
}

class _LoginFormState extends State<LoginForm> {
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();

  void _handleSubmit() {
    // Handle login logic
  }

  @override
  void dispose() {
    _emailController.dispose();
    _passwordController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Center(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                TextFormField(
                  controller: _emailController,
                  keyboardType: TextInputType.emailAddress,
                  decoration: InputDecoration(
                    labelText: 'Email',
                  ),
                ),
                TextFormField(
                  controller: _passwordController,
                  obscureText: true,
                  decoration: InputDecoration(
                    labelText: 'Password',
                  ),
                ),
                SizedBox(height: 16),
                ElevatedButton(
                  onPressed: _handleSubmit,
                  child: Text('Login'),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

Output

Both React Native and Flutter allow for the creation of mobile applications with native user interfaces that can be deployed to iOS and Android devices.

Explanation

React Native and Flutter are both popular options for developing mobile applications. React Native uses JavaScript and React to create native mobile apps, while Flutter uses Dart and a custom rendering engine to achieve the same goal.

React Native is a popular choice for developers who are already familiar with React, as it allows for a shared codebase with web applications. Flutter, on the other hand, provides a more complete development environment, with features such as hot reloading and a powerful set of built-in widgets.

Use

React Native and Flutter can both be used to create cross-platform mobile applications with native user interfaces. The choice between the two largely depends on developer preference and project requirements.

React Native is a good choice for developers who are already familiar with React and have experience with web development. Flutter, on the other hand, provides a more complete development environment and may be better suited for larger applications or projects with a greater need for custom animations and transitions.

Important Points

• React Native uses JavaScript and React to create native mobile apps
• Flutter uses Dart and a custom rendering engine to create native mobile apps
• React Native may be a better choice for developers with web development experience, while Flutter may be better suited for larger or more complex applications

Summary

React Native and Flutter are both powerful options for creating cross-platform mobile applications with native user interfaces. The choice between the two largely depends on developer preferences and project requirements.