import React, { useState } from 'react'; // Main App component for the YouTube Downloader UI function App() { // State to hold the YouTube video URL entered by the user const [videoUrl, setVideoUrl] = useState(''); // State to simulate video information (thumbnail, title, duration) const [videoInfo, setVideoInfo] = useState(null); // State for loading indicator const [isLoading, setIsLoading] = useState(false); // State for error messages const [error, setError] = useState(''); // Function to handle URL input change const handleUrlChange = (e) => { setVideoUrl(e.target.value); setError(''); // Clear error when user types setVideoInfo(null); // Clear previous video info }; // Function to simulate fetching video information const fetchVideoInfo = () => { if (!videoUrl) { setError('Please enter a YouTube video URL.'); return; } setIsLoading(true); setError(''); // Simulate an API call delay setTimeout(() => { // Basic URL validation (can be more robust) if (videoUrl.includes('youtube.com/watch?v=') || videoUrl.includes('youtu.be/')) { // Mock video data for demonstration purposes setVideoInfo({ thumbnail: 'https://placehold.co/480x270/000000/FFFFFF?text=Video+Thumbnail', title: 'Mock YouTube Video Title - Awesome Content', duration: '03:45', qualities: ['1080p MP4', '720p MP4', '480p MP4', 'Audio MP3'], }); } else { setError('Invalid YouTube URL. Please enter a valid link.'); setVideoInfo(null); } setIsLoading(false); }, 1500); // Simulate network delay }; // Function to handle download button click (mocked) const handleDownload = (quality) => { // In a real application, this would trigger the actual download process. // For this mock-up, we'll just log it. console.log(`Attempting to download: ${videoInfo.title} in ${quality}`); // You could show a "Download Started" message here in a real app alert(`Simulating download of "${videoInfo.title}" in ${quality}. (This is a mock action)`); }; // Custom Alert component (instead of window.alert) const Alert = ({ message, onClose }) => (

{message}

); const [showAlert, setShowAlert] = useState(false); const [alertMessage, setAlertMessage] = useState(''); const alert = (message) => { setAlertMessage(message); setShowAlert(true); }; const closeAlert = () => { setShowAlert(false); setAlertMessage(''); }; return (

{/* Custom Alert Modal */} {showAlert && }

YouTube Downloader

{/* Input Section */}

{/* Error Message */} {error && (

{error}

)} {/* Video Information Display */} {videoInfo && (

{ e.target.onerror = null; e.target.src = 'https://placehold.co/480x270/CCCCCC/333333?text=Image+Not+Found'; }} />

{videoInfo.title}

Duration: {videoInfo.duration}

{/* Download Options */}

{videoInfo.qualities.map((quality, index) => ( ))}

)} {/* Disclaimer */}

**Disclaimer:** This is a mock-up for demonstration purposes only. Downloading copyrighted content without permission may violate terms of service and copyright laws. Always respect intellectual property rights.

); } export default App;