Start Node.js in debug mode and break before user code starts

✨ The Prompt Phrase

node --inspect-brk app.js

💻 Code Preview

📦 All-in-One Code

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>node --inspect-brk app.js - Start Node.js in debug mode and break before user code starts - Interactive Tutorial</title>
    <link href="https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&family=Fira+Code:wght@400;500&display=swap" rel="stylesheet">
    <style>
        :root {
            --bg-primary: #0a0e27;
            --bg-secondary: #151932;
            --bg-card: #1e2139;
            --accent-purple: #a855f7;
            --accent-blue: #3b82f6;
            --accent-green: #10b981;
            --accent-red: #ef4444;
            --accent-yellow: #f59e0b;
            --accent-orange: #f97316;
            --text-primary: #f8fafc;
            --text-secondary: #94a3b8;
            --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            --gradient-debug: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
            --shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Poppins', sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        /* Hero Section */
        .hero {
            text-align: center;
            padding: 100px 20px;
            background: var(--gradient-debug);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/></svg>');
            animation: float 20s linear infinite;
        }

        @keyframes float {
            from { transform: translateY(0); }
            to { transform: translateY(-100px); }
        }

        .hero-content {
            position: relative;
            z-index: 1;
        }

        .command-display {
            display: inline-block;
            background: rgba(0, 0, 0, 0.3);
            padding: 20px 40px;
            border-radius: 15px;
            font-family: 'Fira Code', monospace;
            font-size: 1.8rem;
            margin: 30px 0;
            border: 2px solid rgba(255, 255, 255, 0.2);
            animation: pulse 2s ease-in-out infinite;
            word-break: break-all;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.05); }
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 20px;
            animation: slideDown 0.8s ease-out;
        }

        .hero p {
            font-size: 1.3rem;
            opacity: 0.95;
            animation: slideUp 0.8s ease-out;
        }

        @keyframes slideDown {
            from { transform: translateY(-50px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }

        @keyframes slideUp {
            from { transform: translateY(50px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }

        /* Progress Bar */
        .progress-container {
            position: sticky;
            top: 0;
            width: 100%;
            height: 5px;
            background: var(--bg-secondary);
            z-index: 1000;
        }

        .progress-bar {
            height: 100%;
            background: var(--gradient-3);
            width: 0%;
            transition: width 0.3s ease;
        }

        /* Section Styles */
        .section {
            margin: 60px 0;
            animation: fadeIn 0.8s ease-out;
            animation-fill-mode: both;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .section-title {
            font-size: 2.5rem;
            margin-bottom: 30px;
            background: var(--gradient-3);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
        }

        .card {
            background: var(--bg-card);
            border-radius: 20px;
            padding: 40px;
            margin: 30px 0;
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 25px 70px rgba(0, 0, 0, 0.4);
        }

        /* Code Block */
        .code-block {
            background: #1e1e1e;
            border-radius: 15px;
            padding: 25px;
            margin: 20px 0;
            position: relative;
            overflow: hidden;
            font-family: 'Fira Code', monospace;
        }

        .code-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .code-lang {
            color: var(--accent-green);
            font-weight: 600;
        }

        .copy-btn {
            background: var(--accent-purple);
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 0.9rem;
            transition: all 0.3s ease;
        }

        .copy-btn:hover {
            background: var(--accent-blue);
            transform: scale(1.05);
        }

        .copy-btn.copied {
            background: var(--accent-green);
        }

        pre {
            margin: 0;
            overflow-x: auto;
        }

        code {
            color: #e0e0e0;
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .code-comment {
            color: #6a9955;
        }

        .code-keyword {
            color: #569cd6;
        }

        .code-string {
            color: #ce9178;
        }

        .code-function {
            color: #dcdcaa;
        }

        .code-number {
            color: #b5cea8;
        }

        /* Steps */
        .steps {
            counter-reset: step-counter;
        }

        .step {
            background: var(--bg-secondary);
            border-radius: 15px;
            padding: 30px;
            margin: 20px 0;
            position: relative;
            padding-left: 80px;
            transition: all 0.3s ease;
        }

        .step:hover {
            background: var(--bg-card);
            transform: translateX(10px);
        }

        .step::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            width: 50px;
            height: 50px;
            background: var(--gradient-debug);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
        }

        .step h3 {
            color: var(--accent-orange);
            margin-bottom: 10px;
        }

        /* Interactive Demo */
        .demo-container {
            background: var(--bg-secondary);
            border-radius: 20px;
            padding: 40px;
            margin: 30px 0;
        }

        .terminal {
            background: #1e1e1e;
            border-radius: 15px;
            padding: 20px;
            font-family: 'Fira Code', monospace;
            margin: 20px 0;
            min-height: 150px;
        }

        .terminal-header {
            display: flex;
            gap: 8px;
            margin-bottom: 15px;
        }

        .terminal-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
        }

        .terminal-dot.red { background: #ff5f56; }
        .terminal-dot.yellow { background: #ffbd2e; }
        .terminal-dot.green { background: #27c93f; }

        .terminal-content {
            color: #e0e0e0;
            line-height: 1.8;
        }

        .terminal-prompt {
            color: var(--accent-green);
        }

        .terminal-command {
            color: var(--accent-blue);
        }

        .demo-button {
            background: var(--gradient-debug);
            color: white;
            border: none;
            padding: 15px 40px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin: 10px;
        }

        .demo-button:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 30px rgba(249, 115, 22, 0.4);
        }

        /* Tabs */
        .tabs {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .tab {
            padding: 12px 24px;
            background: var(--bg-secondary);
            border: none;
            border-radius: 10px;
            color: var(--text-primary);
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 1rem;
        }

        .tab:hover {
            background: var(--bg-card);
        }

        .tab.active {
            background: var(--gradient-debug);
        }

        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
            animation: fadeIn 0.5s ease-out;
        }

        /* Accordion */
        .accordion-header {
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px;
            background: var(--bg-secondary);
            border-radius: 12px;
            margin: 15px 0;
            transition: all 0.3s ease;
        }

        .accordion-header:hover {
            background: var(--bg-card);
        }

        .accordion-icon {
            transition: transform 0.3s ease;
            font-size: 1.2rem;
        }

        .accordion-icon.active {
            transform: rotate(180deg);
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .accordion-content.active {
            max-height: 2000px;
        }

        .accordion-body {
            padding: 20px;
            background: var(--bg-secondary);
            border-radius: 12px;
            margin-top: 5px;
        }

        /* Tips */
        .tip {
            background: rgba(59, 130, 246, 0.1);
            border-left: 4px solid var(--accent-blue);
            padding: 20px;
            border-radius: 10px;
            margin: 20px 0;
        }

        .tip::before {
            content: '💡 ';
            font-size: 1.5rem;
        }

        .warning {
            background: rgba(239, 68, 68, 0.1);
            border-left: 4px solid #ef4444;
            padding: 20px;
            border-radius: 10px;
            margin: 20px 0;
        }

        .warning::before {
            content: '⚠️ ';
            font-size: 1.5rem;
        }

        .success {
            background: rgba(16, 185, 129, 0.1);
            border-left: 4px solid var(--accent-green);
            padding: 20px;
            border-radius: 10px;
            margin: 20px 0;
        }

        .success::before {
            content: '✅ ';
            font-size: 1.5rem;
        }

        .info {
            background: rgba(249, 115, 22, 0.1);
            border-left: 4px solid var(--accent-orange);
            padding: 20px;
            border-radius: 10px;
            margin: 20px 0;
        }

        .info::before {
            content: '🔍 ';
            font-size: 1.5rem;
        }

        /* Quiz */
        .quiz-container {
            background: var(--bg-card);
            border-radius: 20px;
            padding: 40px;
            margin: 30px 0;
        }

        .quiz-question {
            margin: 30px 0;
        }

        .quiz-question h3 {
            color: var(--accent-purple);
            margin-bottom: 20px;
        }

        .quiz-options {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .quiz-option {
            background: var(--bg-secondary);
            padding: 20px;
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }

        .quiz-option:hover {
            border-color: var(--accent-blue);
            transform: translateX(10px);
        }

        .quiz-option.correct {
            border-color: var(--accent-green);
            background: rgba(16, 185, 129, 0.1);
        }

        .quiz-option.incorrect {
            border-color: #ef4444;
            background: rgba(239, 68, 68, 0.1);
        }

        .quiz-feedback {
            margin-top: 15px;
            padding: 15px;
            border-radius: 10px;
            display: none;
        }

        .quiz-feedback.show {
            display: block;
            animation: slideIn 0.5s ease-out;
        }

        @keyframes slideIn {
            from { opacity: 0; transform: translateX(-20px); }
            to { opacity: 1; transform: translateX(0); }
        }

        .quiz-feedback.correct {
            background: rgba(16, 185, 129, 0.1);
            border-left: 4px solid var(--accent-green);
        }

        .quiz-feedback.incorrect {
            background: rgba(239, 68, 68, 0.1);
            border-left: 4px solid #ef4444;
        }

        /* Cheat Sheet */
        .cheat-sheet {
            background: var(--gradient-debug);
            border-radius: 20px;
            padding: 40px;
            margin: 30px 0;
        }

        .cheat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .cheat-item {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            padding: 20px;
            border-radius: 15px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .cheat-item h4 {
            color: var(--accent-green);
            margin-bottom: 10px;
        }

        .badge {
            display: inline-block;
            padding: 5px 15px;
            background: var(--gradient-2);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin: 5px;
        }

        .highlight {
            color: var(--accent-orange);
            font-weight: 600;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }

        .comparison-table th,
        .comparison-table td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .comparison-table th {
            background: var(--bg-secondary);
            color: var(--accent-orange);
            font-weight: 600;
        }

        .comparison-table tr:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        /* Footer */
        .footer {
            text-align: center;
            padding: 40px 20px;
            background: var(--bg-secondary);
            margin-top: 80px;
        }

        .footer p {
            color: var(--text-secondary);
            margin: 10px 0;
        }

        /* Confetti */
        .confetti {
            position: fixed;
            width: 10px;
            height: 10px;
            z-index: 9999;
        }

        @keyframes confetti-fall {
            to {
                transform: translateY(100vh) rotate(360deg);
                opacity: 0;
            }
        }

        /* Debugger Visual */
        .debugger-visual {
            background: var(--bg-secondary);
            border-radius: 15px;
            padding: 30px;
            margin: 30px 0;
            border: 2px solid var(--accent-orange);
        }

        .breakpoint {
            display: inline-block;
            width: 20px;
            height: 20px;
            background: var(--accent-red);
            border-radius: 50%;
            margin-right: 10px;
            animation: blink 1.5s infinite;
        }

        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2rem;
            }

            .command-display {
                font-size: 1.2rem;
                padding: 15px 25px;
            }

            .hero p {
                font-size: 1rem;
            }

            .section-title {
                font-size: 1.8rem;
            }

            .card {
                padding: 25px;
            }

            .step {
                padding-left: 70px;
            }

            .step::before {
                width: 40px;
                height: 40px;
                font-size: 1.2rem;
            }
        }
    </style>
</head>
<body>
    <div class="progress-container">
        <div class="progress-bar" id="progressBar"></div>
    </div>

    <div class="hero">
        <div class="hero-content">
            <h1>🐛 Master Node.js Debugging</h1>
            <div class="command-display">node --inspect-brk app.js</div>
            <p>Debug like a pro with breakpoints from the start! 🔍</p>
        </div>
    </div>

    <div class="container">
        <!-- What Is It Section -->
        <section class="section" id="what-is-it">
            <h2 class="section-title">🤔 What Is It?</h2>
            <div class="card">
                <p style="font-size: 1.2rem; margin-bottom: 20px;">
                    <strong>node --inspect-brk app.js</strong> is like having a <span class="highlight">pause button</span> at the very beginning of your code! ⏸️
                </p>
                <p style="margin-bottom: 20px;">
                    This command starts your Node.js application in <strong>debug mode</strong> with the debugger <strong>paused at the first line</strong> of your code. It's perfect for catching bugs that happen early in your application's lifecycle!
                </p>
                <div class="info">
                    <strong>Think of it like this:</strong> Imagine watching a movie frame-by-frame from the very first scene. That's what <code>--inspect-brk</code> does for your code! 🎬
                </div>
                <p style="margin-top: 20px;">
                    The <code>--inspect-brk</code> flag combines two powerful features:
                </p>
                <ul style="margin-left: 30px; margin-top: 15px; line-height: 2;">
                    <li><strong>--inspect</strong>: Enables the debugger (connects to Chrome DevTools)</li>
                    <li><strong>brk</strong> (break): Pauses execution before your code starts running</li>
                </ul>
            </div>
        </section>

        <!-- Why Use It Section -->
        <section class="section" id="why-use-it">
            <h2 class="section-title">✨ Why Use It?</h2>
            <div class="card">
                <div class="cheat-grid">
                    <div class="cheat-item">
                        <h4>🎯 Catch Early Bugs</h4>
                        <p>Debug issues that happen during initialization before they cause problems!</p>
                    </div>
                    <div class="cheat-item">
                        <h4>🔍 Step Through Code</h4>
                        <p>Execute your code line-by-line to understand exactly what's happening.</p>
                    </div>
                    <div class="cheat-item">
                        <h4>👀 Inspect Variables</h4>
                        <p>See the values of variables at any point in your code's execution.</p>
                    </div>
                    <div class="cheat-item">
                        <h4>

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