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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

39 - Comment Section with Nested Replies

Description

Create a comment section component that renders a list of comments, each with author name, comment content, nested replies (if any), displayed hierarchically, and timestamp. The component should allow users to create new comments and facilitate posting replies to existing comments, maintaining the nesting structure.

Algorithm

  1. Create a React component for the comment section

  2. Define the comment data structure (author, content, replies, timestamp)

  3. Use the useState hook to manage the comment list and the current comment being replied to

  4. Create a function to handle the creation of new comments

  5. Create a function to handle the posting of replies to existing comments

  6. Render the comment list with nested replies and the comment form

Classes

  • CommentSection: The main comment section component

  • Comment: A single comment component

  • CommentForm: The comment form component

Code

CommentSection.js

import React, { useState } from 'react';
import Comment from './Comment';
import CommentForm from './CommentForm';

const CommentSection = () => {
  const [comments, setComments] = useState([]);
  const [currentComment, setCurrentComment] = useState(null);

  const handleNewComment = (comment) => {
    setComments([...comments, comment]);
  };

  const handleReply = (commentId, reply) => {
    const updatedComments = comments.map((comment) => {
      if (comment.id === commentId) {
        return { ...comment, replies: [...comment.replies, reply] };
      }
      return comment;
    });
    setComments(updatedComments);
  };

  return (
    <div>
      {comments.map((comment) => (
        <Comment
          key={comment.id}
          comment={comment}
          onReply={(reply) => handleReply(comment.id, reply)}
        />
      ))}
      <CommentForm onSubmit={(comment) => handleNewComment(comment)} />
    </div>
  );
};

export default CommentSection;

Comment.js

import React from 'react';

const Comment = ({ comment, onReply }) => {
  return (
    <div>
      <h4>{comment.author}</h4>
      <p>{comment.content}</p>
      <p>{comment.timestamp}</p>
      {comment.replies.length > 0 && (
        <ul>
          {comment.replies.map((reply) => (
            <li key={reply.id}>
              <Comment comment={reply} onReply={onReply} />
            </li>
          ))}
        </ul>
      )}
      <button onClick={() => onReply(comment.id}>Reply</button>
    </div>
  );
};

export default Comment;

CommentForm.js

import React from 'react';

const CommentForm = ({ onSubmit }) => {
  const [author, setAuthor] = useState('');
  const [content, setContent] = useState('');

  const handleSubmit = (event) => {
    event.preventDefault();
    onSubmit({ author, content });
  };

  return (
    <form onSubmit={handleSubmit}>
      <input
        type="text"
        value={author}
        onChange={(event) => setAuthor(event.target.value)}
        placeholder="Author"
      />
      <textarea
        value={content}
        onChange={(event) => setContent(event.target.value)}
        placeholder="Comment"
      />
      <button type="submit">Submit</button>
    </form>
  );
};

export default CommentForm;

Explanation

The code creates a comment section component that renders a list of comments, each with author name, comment content, nested replies (if any), displayed hierarchically, and timestamp. The component allows users to create new comments and facilitates posting replies to existing comments, maintaining the nesting structure. The component uses the useState hook to manage the comment list and the current comment being replied to.

Possible Future Enhancements

  • Add support for comment editing and deleting

  • Add support for comment voting and sorting

  • Add support for pagination and infinite scrolling

  • Use a library like React Comment for more advanced comment section functionality

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Last updated 10 months ago