React Native Mobile Apps :WebSocket

Photo by Christopher Robin Ebbinghaus on Unsplash

React Native is a popular framework for building mobile apps that run on both Android and iOS devices. It allows developers to build native mobile apps using JavaScript and the React framework.

WebSockets is a protocol for bidirectional communication between a client and a server over a single TCP connection. It can be used to build real-time applications such as chat, games, and other interactive features.

To use WebSockets in a React Native mobile app, you can use the WebSocket API provided by the react-native-websocket library. This library provides a simple interface for connecting to a WebSocket server and sending and receiving messages.

Here’s an example of how to use the WebSocket API to establish a connection to a WebSocket server and send a message:

Copy code

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

const App = () => {
  useEffect(() => {
    const ws = new WebSocket('ws://echo.websocket.org');
    ws.onopen = () => {
      // Connection opened
      console.log('WebSocket connection opened');
      ws.send('Hello, server!'); // Send a message to the server
    };
    ws.onmessage = (e) => {
      // Receive a message from the server
      console.log(e.data);
    };
    ws.onerror = (e) => {
      // An error occurred
      console.log(e.message);
    };
    ws.onclose = (e) => {
      // Connection closed
      console.log(e.code, e.reason);
    };
  }, []);
  return (
    <View>
      <Text>WebSocket Example</Text>
    </View>
  );
};
export default App;

This example establishes a connection to the echo.websocket.org server, which simply echoes back any messages that it receives. When the connection is opened, the example sends a message to the server and logs any messages received from the server to the console.