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50 React Coding Puzzles
  • 50 React Coding Puzzles
  • Contact
  • Reviews
  • Table of Contents
  • Introduction
  • 1 - Simple Counter App
  • 2 - Dynamic List of Items with Strikethrough
  • 3 - Color Picker with Hex Code Display
  • 4 - Password Strength Checker
  • 5 - Countdown Timer with Audio
  • 6 - Dynamic Movie List with Filtering and Sorting
  • 7 - Text Animation Component (Fade/Scroll)
  • 8 - Dynamically Generated Text Art
  • 9 - Meme Generator with Custom Text
  • 10 - "What Should I Eat?" Random Recipe Generator
  • 11 - Simple Quiz App with Multiple Choice
  • 12 - Unit Converter
  • 13 - Dynamic Image Gallery with Lightbox
  • 14 - Weather Widget with Temperature and Description
  • 15 - Contact Form with Email and Message Validation
  • 16 - Color Palette Generator
  • 17 - Drag-and-Drop Feature for Rearranging Items
  • 18 - Interactive Quiz with Dynamic Results and Feedback
  • 19 - To-Do List with Task Categorization
  • 20 - Note-Taking App with Markdown Support
  • 21 - Simple Calculator with Basic Operations
  • 22 - Word Scramble Game with Timer and Score
  • 23 - Number Guessing Game
  • 24 - Digital Clock with Time Zone Support
  • 25 - Interactive Time Zone Converter
  • 26 - Weather Forecast App with Location Detection
  • 27 - Real-Time Stock Ticker with Updates
  • 28 - Virtual Dice Roller with Multiple Dice
  • 29 - Responsive Navigation Menu with Dropdowns
  • 30 - Progress Bar for Loading or Task Completion
  • 31 - Modal Window for Alerts and Confirmations
  • 32 - Infinite Scroll for Loading More Content
  • 33 - Form Validation with Error Messages
  • 34 - Search Bar with Filtering and Suggestions
  • 35 - Drag-and-Drop File Upload
  • 36 - Interactive Color Picker with Sliders
  • 37 - Image Carousel with Autoplay
  • 38 - Rating System with Stars or Thumbs Up/Down
  • 39 - Comment Section with Nested Replies
  • 40 - Pagination for Long Lists of Data
  • 41 - Stopwatch app that tracks elapsed time
  • 42 - Responsive E-commerce Product Grid
  • 43 - Random Movie/Book Recommender
  • 44 - Kanban board for managing tasks with drag-and-drop
  • 45 - Chat application with real-time messaging using WebSockets
  • 46 - Calendar that displays events and allows scheduling
  • 47 - Tic-Tac-Toe Game
  • 48 - Hangman Game
  • 49 - Notes App
  • 50 - Expense Tracker
  • Afterword
  • Appendix
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On this page
  • Description
  • Algorithm
  • Classes
  • Code
  • Explanation
  • Possible Future Enhancements

45 - Chat application with real-time messaging using WebSockets

Description

Create a chat application with real-time messaging using WebSockets, establishing a WebSocket connection to a server-side endpoint, displaying a chat interface with message history and user input, sending and receiving messages through the WebSocket connection, and updating the interface accordingly.

Algorithm

  1. Set up a WebSocket server-side endpoint

  2. Establish a WebSocket connection from the client-side to the server-side endpoint

  3. Display a chat interface with message history and user input

  4. Send messages from the client-side to the server-side through the WebSocket connection

  5. Receive messages from the server-side and update the chat interface accordingly

  6. Handle disconnections and reconnects

Classes

  • ChatApp: The main chat application component

  • ChatInterface: The chat interface component displaying message history and user input

  • WebSocketService: The service establishing and managing the WebSocket connection

Code

ChatApp.js

import React, { useState, useEffect } from 'react';
import ChatInterface from './ChatInterface';
import WebSocketService from './WebSocketService';

const ChatApp = () => {
  const [messages, setMessages] = useState([]);
  const [inputValue, setInputValue] = useState('');
  const [connected, setConnected] = useState(false);

  useEffect(() => {
    WebSocketService.connect();
    setConnected(true);
  }, []);

  const handleSendMessage = (message) => {
    WebSocketService.send(message);
  };

  const handleReceiveMessage = (message) => {
    setMessages((prevMessages) => [...prevMessages, message]);
  };

  return (
    <div>
      <ChatInterface
        messages={messages}
        inputValue={inputValue}
        handleSendMessage={handleSendMessage}
        handleReceiveMessage={handleReceiveMessage}
      />
    </div>
  );
};

export default ChatApp;

ChatInterface.js

import React from 'react';

const ChatInterface = ({ messages, inputValue, handleSendMessage, handleReceiveMessage }) => {
  return (
    <div>
      <h2>Chat Interface</h2>
      <ul>
        {messages.map((message, index) => (
          <li key={index}>{message}</li>
        ))}
      </ul>
      <input
        type="text"
        value={inputValue}
        onChange={(e) => setInputValue(e.target.value)}
      />
      <button onClick={() => handleSendMessage(inputValue)}>Send</button>
    </div>
  );
};

export default ChatInterface;

WebSocketService.js

import WebSocket from 'ws';

const WebSocketService = {
  connect: () => {
    const socket = new WebSocket('ws://localhost:8080');
    socket.onmessage = (event) => {
      handleReceiveMessage(event.data);
    };
    socket.onopen = () => {
      console.log('Connected to WebSocket server');
    };
    socket.onclose = () => {
      console.log('Disconnected from WebSocket server');
    };
  },

  send: (message) => {
    socket.send(message);
  },
};

export default WebSocketService;

Explanation

The code establishes a WebSocket connection from the client-side to the server-side endpoint, displays a chat interface with message history and user input, sends and receives messages through the WebSocket connection, and updates the interface accordingly.

Possible Future Enhancements

  • Add support for multiple chat rooms

  • Add support for user authentication and authorization

  • Add support for file transfers

  • Improve performance and scalability

  • Integrate with a backend API for data persistence

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Last updated 10 months ago