Run the "start" script defined in package.json
📦 Node.js-> Command Line
✨ The Prompt Phrase
npm start
💻 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>Run the "start" script defined in package.json - Interactive Tutorial</title>
<link href="https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700;900&family=Fira+Code:wght@400;500;600&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-pink: #ec4899;
--accent-cyan: #06b6d4;
--text-primary: #f8fafc;
--text-secondary: #94a3b8;
--gradient-start: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
--gradient-success: linear-gradient(135deg, #10b981 0%, #059669 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;
}
.progress-container {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 5px;
background: var(--bg-secondary);
z-index: 1000;
}
.progress-bar {
height: 100%;
background: var(--gradient-start);
width: 0%;
transition: width 0.3s ease;
}
.hero {
text-align: center;
padding: 100px 20px;
background: var(--gradient-start);
position: relative;
overflow: hidden;
border-radius: 0 0 50px 50px;
}
.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;
}
.play-icon {
font-size: 5rem;
margin-bottom: 20px;
animation: playPulse 2s ease-in-out infinite;
}
@keyframes playPulse {
0%, 100% { transform: scale(1); }
50% { transform: scale(1.2); }
}
.command-display {
display: inline-block;
background: rgba(0, 0, 0, 0.4);
padding: 25px 40px;
border-radius: 15px;
font-family: 'Fira Code', monospace;
font-size: 1.8rem;
margin: 30px 0;
border: 3px solid rgba(255, 255, 255, 0.3);
animation: pulse 2s ease-in-out infinite;
color: white;
font-weight: 600;
}
@keyframes pulse {
0%, 100% { transform: scale(1); }
50% { transform: scale(1.05); }
}
.hero h1 {
font-size: 3.5rem;
font-weight: 900;
margin-bottom: 20px;
color: white;
text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}
.hero p {
font-size: 1.4rem;
opacity: 0.95;
color: white;
}
.section {
margin: 60px 0;
}
.section-title {
font-size: 2.5rem;
margin-bottom: 30px;
background: var(--gradient-start);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
display: inline-block;
font-weight: 700;
}
.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;
}
.card:hover {
transform: translateY(-5px);
}
.code-block {
background: #1e1e1e;
border-radius: 15px;
padding: 25px;
margin: 20px 0;
font-family: 'Fira Code', monospace;
position: relative;
}
.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);
}
.terminal-dots {
display: flex;
gap: 6px;
}
.terminal-dot {
width: 12px;
height: 12px;
border-radius: 50%;
}
.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }
.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: 1.8;
}
.code-comment { color: #6a9955; }
.code-string { color: #ce9178; }
.code-keyword { color: #569cd6; }
.code-property { color: #9cdcfe; }
.steps {
counter-reset: step-counter;
}
.step {
background: var(--bg-secondary);
border-radius: 15px;
padding: 30px;
margin: 20px 0;
position: relative;
padding-left: 100px;
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: 60px;
height: 60px;
background: var(--gradient-start);
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
font-size: 1.8rem;
font-weight: 900;
color: white;
}
.step h3 {
color: var(--accent-cyan);
margin-bottom: 10px;
font-size: 1.5rem;
}
.feature-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
gap: 25px;
margin: 30px 0;
}
.feature-card {
background: var(--bg-secondary);
padding: 30px;
border-radius: 15px;
text-align: center;
transition: all 0.3s ease;
border: 2px solid transparent;
}
.feature-card:hover {
border-color: var(--accent-cyan);
transform: translateY(-10px);
}
.feature-icon {
font-size: 3.5rem;
margin-bottom: 15px;
}
.feature-title {
font-weight: 600;
color: var(--accent-cyan);
margin-bottom: 10px;
font-size: 1.3rem;
}
.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;
min-height: 300px;
margin: 20px 0;
overflow-y: auto;
max-height: 500px;
}
.terminal-line {
margin: 10px 0;
}
.terminal-prompt {
color: var(--accent-green);
}
.demo-button {
background: var(--gradient-start);
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(6, 182, 212, 0.4);
}
.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-start);
color: white;
}
.tab-content {
display: none;
}
.tab-content.active {
display: block;
}
.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;
}
.tip, .warning, .success, .info {
padding: 20px;
border-radius: 10px;
margin: 20px 0;
}
.tip {
background: rgba(59, 130, 246, 0.1);
border-left: 4px solid var(--accent-blue);
}
.tip::before { content: '💡 '; font-size: 1.5rem; }
.warning {
background: rgba(239, 68, 68, 0.1);
border-left: 4px solid var(--accent-red);
}
.warning::before { content: '⚠️ '; font-size: 1.5rem; }
.success {
background: rgba(16, 185, 129, 0.1);
border-left: 4px solid var(--accent-green);
}
.success::before { content: '✅ '; font-size: 1.5rem; }
.info {
background: rgba(236, 72, 153, 0.1);
border-left: 4px solid var(--accent-pink);
}
.info::before { content: '🔍 '; font-size: 1.5rem; }
.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;
font-size: 1.3rem;
}
.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: var(--accent-red);
background: rgba(239, 68, 68, 0.1);
}
.quiz-feedback {
margin-top: 15px;
padding: 15px;
border-radius: 10px;
display: none;
}
.quiz-feedback.show {
display: block;
}
.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 var(--accent-red);
}
.cheat-sheet {
background: var(--gradient-start);
border-radius: 20px;
padding: 40px;
margin: 30px 0;
color: white;
}
.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, 0.15);
backdrop-filter: blur(10px);
padding: 20px;
border-radius: 15px;
border: 1px solid rgba(255, 255, 255, 0.2);
}
.cheat-item h4 {
color: white;
margin-bottom: 10px;
font-weight: 600;
}
.cheat-item code {
background: rgba(0, 0, 0, 0.3);
padding: 4px 8px;
border-radius: 5px;
font-size: 0.9rem;
color: white;
}
.highlight {
color: var(--accent-yellow);
font-weight: 600;
}
.footer {
text-align: center;
padding: 40px 20px;
background: var(--bg-secondary);
margin-top: 80px;
border-radius: 20px;
}
.footer p {
color: var(--text-secondary);
margin: 10px 0;
}
.badge {
display: inline-block;
padding: 6px 12px;
background: var(--gradient-start);
border-radius: 20px;
font-size: 0.85rem;
font-weight: 600;
margin: 5px;
}
.confetti {
position: fixed;
width: 10px;
height: 10px;
background: var(--accent-cyan);
animation: confetti-fall 3s linear forwards;
z-index: 9999;
}
@keyframes confetti-fall {
to {
transform: translateY(100vh) rotate(360deg);
opacity: 0;
}
}
@media (max-width: 768px) {
.hero h1 { font-size: 2rem; }
.command-display { font-size: 1.2rem; padding: 15px 20px; }
.section-title { font-size: 1.8rem; }
.card { padding: 25px; }
.step { padding-left: 80px; }
.step::before { width: 50px; height: 50px; font-size: 1.5rem; }
}
</style>
</head>
<body>
<div class="progress-container">
<div class="progress-bar" id="progressBar"></div>
</div>
<div class="hero">
<div class="hero-content">
<div class="play-icon">▶️</div>
<h1>Master npm start!</h1>
<div class="command-display">npm start</div>
<p>Launch your application with one command! 🚀</p>
</div>
</div>
<div class="container">
<!-- What Is It -->
<section class="section">
<h2 class="section-title">🤔 What Is npm start?</h2>
<div class="card">
<p style="font-size: 1.2rem; margin-bottom: 20px;">
This command <span class="highlight">runs</span> the <strong>"start" script</strong> defined in your package.json file! ▶️
</p>
<p style="margin-bottom: 20px;">
Think of it like pressing the "play" button on your project! 🎮 It executes whatever command you've defined as the start script - usually launching your web server, development environment, or application!
</p>
<div class="info">
<strong>Breaking It Down:</strong>
<ul style="margin-left: 30px; margin-top: 10px; line-height: 2;">
<li><code>npm</code> - Node Package Manager</li>
<li><code>start</code> - Runs the "start" script from package.json</li>
<li>Common uses: Start dev server, launch app, run build</li>
</ul>
</div>
<div style="margin-top: 30px;">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">Where is the "start" script? 🔍</h3>
<p>It's defined in the <strong>"scripts"</strong> section of your package.json file. npm start is a shortcut to run it!</p>
</div>
</div>
</section>
<!-- Why Use It -->
<section class="section">
<h2 class="section-title">✨ Why Use npm start?</h2>
<div class="card">
<div class="feature-grid">
<div class="feature-card">
<div class="feature-icon">⚡</div>
<div class="feature-title">Quick Launch</div>
<p style="color: var(--text-secondary);">Start your app with one command!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🎯</div>
<div class="feature-title">Standardized</div>
<p style="color: var(--text-secondary);">Everyone uses the same command!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🔧</div>
<div class="feature-title">Configurable</div>
<p style="color: var(--text-secondary);">Customize what "start" does!</p>
</div>
<div class="feature-card">
<div class="feature-icon">📝</div>
<div class="feature-title">Simple</div>
<p style="color: var(--text-secondary);">No need to remember complex commands!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🚀</div>
<div class="feature-title">Dev Friendly</div>
<p style="color: var(--text-secondary);">Perfect for development workflow!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🎓</div>
<div class="feature-title">Beginner Friendly</div>
<p style="color: var(--text-secondary);">Easy to understand and use!</p>
</div>
</div>
</div>
</section>
<!-- How It Works -->
<section class="section">
<h2 class="section-title">⚙️ How Does It Work?</h2>
<div class="card">
<div class="steps">
<div class="step">
<h3>Step 1: Reads package.json</h3>
<p>npm looks for the "scripts" section in your package.json file.</p>
</div>
<div class="step">
<h3>Step 2: Finds "start" Script</h3>
<p>Locates the command defined under "start" in the scripts object.</p>
</div>
<div class="step">
<h3>Step 3: Executes Command</h3>
<p>Runs the command exactly as written in the start script.</p>
</div>
<div class="step">
<h3>Step 4: Launches Application</h3>
<p>Your server starts, app launches, or build process begins!</p>
</div>
<div class="step">
<h3>Step 5: Keeps Running</h3>
<p>The process continues until you stop it (Ctrl+C)! 🎉</p>
</div>
</div>
</div>
</section>
<!-- Live Demo -->
<section class="section">
<h2 class="section-title">🎮 Interactive Demo</h2>
<div class="demo-container">
<h3 style="margin-bottom: 20px; font-size: 1.5rem;">See npm start in Action! 🚀</h3>
<button class="demo-button" onclick="simulateStart()">
<span>▶️</span>
<span>Run npm start</span>
</button>
<button class="demo-button" onclick="showPackageJson()">
<span>📄</span>
<span>View package.json</span>
</button>
<div class="terminal" id="terminal">
<div class="terminal-line">
<span class="terminal-prompt">$</span>
<span style="color: var(--text-secondary);"> Ready for command...</span>
</div>
</div>
</div>
</section>
<!-- Code Breakdown -->
<section class="section">
<h2 class="section-title">💻 Script Examples</h2>
<div class="card">
<div class="tabs">
<button class="tab active" onclick="switchTab('react')">React App</button>
<button class="tab" onclick="switchTab('node')">Node Server</button>
<button class="tab" onclick="switchTab('custom')">Custom Script</button>
</div>
<div id="react" class="tab-content active">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">React Application</h3>
<div class="code-block">
<div class="code-header">
<div class="terminal-dots">
<div class="terminal-dot dot-red"></div>
<div class="terminal-dot dot-yellow"></div>
<div class="terminal-dot dot-green"></div>
</div>
<button class="copy-btn" onclick="copyCode('react-code')">📋 Copy</button>
</div>
<pre><code id="react-code"><span class="code-comment">// package.json</span>
{
<span class="code-property">"name"</span>: <span class="code-string">"my-react-app"</span>,
<span class="code-property">"scripts"</span>: {
<span class="code-property">"start"</span>: <span class="code-string">"react-scripts start"</span>
}
}
<span class="code-comment"># Run with:</span>
npm start
<span class="code-comment"># This starts the React dev server on http://localhost:3000</span></code></pre>
</div>
</div>
<div id="node" class="tab-content">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">Node.js Server</h3>
<div class="code-block">
<div class="code-header">
<div class="terminal-dots">
<div class="terminal-dot dot-red"></div>
<div class="terminal-dot dot-yellow"></div>
<div class="terminal-dot dot-green"></div>
</div>
<button class="copy-btn" onclick="copyCode('node-code')">📋 Copy</button>
</div>
<pre><code id="node-code"><span class="code-comment">// package.json</span>
{
<span class="code-property">"name"</span>: <span class="code-string">"my-node-app"</span>,
<span class="code-property">"scripts"</span>: {
<span class="code-property">"start"</span>: <span class="code-string">"node server.js"</span>
}
}
<span class="code-comment"># Run with:</span>
npm start
<span class="code-comment"># This runs your Node.js server</span></code></pre>
</div>
</div>
<div id="custom" class="tab-content">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">Custom Scripts</h3>
<div class="code-block">
<div class="code-header">
<div class="terminal-dots">
<div class="terminal-dot dot-red"></div>
<div class="terminal-dot dot-yellow"></div>
<div class="terminal-dot dot-green"></div>
</div>
<button class="copy-btn" onclick="copyCode('custom-code')">📋 Copy</button>
</div>
<pre><code id="custom-code"><span class="code-comment">// package.json</span>
{
<span class="code-property">"scripts"</span>: {
<span class="code-property">"start"</span>: <span class="code-string">"nodemon app.js"</span>,
<span class="code-property">"start:dev"</span>: <span class="code-string">"NODE_ENV=development node app.js"</span>,
<span class="code-property">"start:prod"</span>: <span class="code-string">"NODE_ENV=production node app.js"</span>
}
}
<span class="code-comment"># Run different versions:</span>
npm start <span class="code-comment"># Default start</span>
npm run start:dev <span class="code-comment"># Development mode</span>
npm run start:prod <span class="code-comment"># Production mode</span></code></pre>
</div>
<div class="tip" style="margin-top: 15px;">
<strong>Pro Tip:</strong> You can create multiple start scripts for different environments!
</div>
</div>
</div>
</section>
<!-- Common Mistakes -->
<section class="section">
<h2 class="section-title">❌ Common Mistakes</h2>
<div class="card">
<div class="accordion">
<div class="accordion-item">
<div class="accordion-header" onclick="toggleAccordion(this)">
<span><strong>1. No "start" Script Defined</strong></span>
<span class="accordion-icon">▼</span>
</div>
<div class="accordion-content">
<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> Running npm start when there's no start script in package.json!
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Add a "start" script to your package.json or use a different script name!
</div>
</div>
</div>
</div>
<div class="accordion-item">
<div class="accordion-header" onclick="toggleAccordion(this)">
<span><strong>2. Wrong Directory</strong></span>
<span class="accordion-icon">▼</span>
</div>
<div class="accordion-content">
<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> Running npm start outside your project folder!
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Make sure you're in the directory with package.json before running npm start!
</div>
</div>
</div>
</div>
<div class="accordion-item">
<div class="accordion-header" onclick="toggleAccordion(this)">
<span><strong>3. Port Already in Use</strong></span>
<span class="accordion-icon">▼</span>
</div>
<div class="accordion-content">
<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> The port your app uses is already occupied!
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Stop the other process or change your app's port number!
</div>
</div>
</div>
</div>
</div>
</div>
</section>
<!-- Pro Tips -->
<section class="section">
<h2 class="section-title">🚀 Pro Tips</h2>
<div class="card">
<div class="tip">
<strong>Use nodemon for auto-restart</strong> - Set start script to <code>"nodemon app.js"</code> for automatic restarts on file changes!
</div>
<div class="tip">
<strong>Environment variables</strong> - Pass environment variables in your start script: <code>"NODE_ENV=production node app.js"</code>
</div>
<div class="tip">
<strong>Multiple commands</strong> - Chain commands with <code>&&</code>: <code>"npm run build && node server.js"</code>
</div>
<div class="tip">
<strong>Use concurrently</strong> - Run multiple scripts at once: <code>"concurrently \"npm run server\" \"npm run client\""</code>
</div>
<div class="tip">
<strong>Stop with Ctrl+C</strong> - Always use Ctrl+C (or Cmd+C on Mac) to gracefully stop npm start!
</div>
</div>
</section>
<!-- Quiz -->
<section class="section">
<h2 class="section-title">🎯 Knowledge Check Quiz</h2>
<div class="quiz-container">
<p style="margin-bottom: 30px; font-size: 1.1rem;">Test your understanding! 🧠</p>
<div class="quiz-question">
<h3>Question 1: What does npm start do?</h3>
<div class="quiz-options">
<div class="quiz-option" onclick="checkAnswer(this, false, 1)">A) Installs all packages</div>
<div class="quiz-option" onclick="checkAnswer(this, true, 1)">B) Runs the "start" script from package.json</div>
<div class="quiz-option" onclick="checkAnswer(this, false, 1)">C) Creates a new project</div>
</div>
<div class="quiz-feedback" id="feedback1"></div>
</div>
<div class="quiz-question">
<h3>Question 2: Where is the start script defined?</h3>
<div class="quiz-options">
<div class="quiz-option" onclick="checkAnswer(this, false, 2)">A) In node_modules</div>
<div class="quiz-option" onclick="checkAnswer(this, true, 2)">B) In package.json under "scripts"</div>
<div class="quiz-option" onclick="checkAnswer(this, false, 2)">C) In a separate start.js file</div>
</div>
<div class="quiz-feedback" id="feedback2"></div>
</div>
<div class="quiz-question">
<h3>Question 3: How do you stop npm start?</h3>
<div class="quiz-options">
<div class="quiz-option" onclick="checkAnswer(this, false, 3)">A) npm stop</div>
<div class="quiz-option" onclick="checkAnswer(this, true, 3)">B) Ctrl+C (or Cmd+C)</div>
<div class="quiz-option" onclick="checkAnswer(this, false, 3)">C) Close the browser</div>
</div>
<div class="quiz-feedback" id="feedback3"></div>
</div>
<div id="quizScore" style="margin-top: 30px; padding: 20px; background: var(--bg-secondary); border-radius: 12px; display: none;">
<h3 style="color: var(--accent-green); font-size: 1.5rem;">🎉 Quiz Complete!</h3>
<p id="scoreText" style="font-size: 1.2rem; margin-top: 10px;"></p>
</div>
</div>
</section>
<!-- Summary Card -->
<section class="section">
<h2 class="section-title">📚 Quick Reference</h2>
<div class="cheat-sheet">
<h3 style="margin-bottom: 20px; font-size: 2rem;">npm start Cheat Sheet! 🔖</h3>
<div class="cheat-grid">
<div class="cheat-item">
<h4>▶️ Basic</h4>
<p><code>npm start</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Run the start script</p>
</div>
<div class="cheat-item">
<h4>🛑 Stop</h4>
<p><code>Ctrl+C</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Stop the process</p>
</div>
<div class="cheat-item">
<h4>📝 Define Script</h4>
<p><code>"start": "node app.js"</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">In package.json</p>
</div>
<div class="cheat-item">
<h4>🔧 With Nodemon</h4>
<p><code>"start": "nodemon app.js"</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Auto-restart on changes</p>
</div>
<div class="cheat-item">
<h4>🌍 With Env Vars</h4>
<p><code>"start": "NODE_ENV=dev node app.js"</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Set environment</p>
</div>
<div class="cheat-item">
<h4>⚛️ React</h4>
<p><code>"start": "react-scripts start"</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">React dev server</p>
</div>
<div class="cheat-item">
<h4>🔗 Chain Commands</h4>
<p><code>"start": "npm run build && node app"</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Multiple commands</p>
</div>
<div class="cheat-item">
<h4>📊 View Scripts</h4>
<p><code>npm run</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">List all scripts</p>
</div>
</div>
</div>
</section>
<!-- Footer -->
<div class="footer">
<h2 style="font-size: 2rem; margin-bottom: 20px; color: var(--accent-pink);">🎉 Congratulations!</h2>
<p style="font-size: 1.2rem; margin-bottom: 20px;">You now understand <strong>npm start</strong>! 🚀</p>
<div style="margin: 30px 0;">
<span class="badge">▶️ Start Master</span>
<span class="badge">🚀 Launch Expert</span>
<span class="badge">📦 Script Pro</span>
</div>
<p style="color: var(--text-secondary); margin-top: 30px;">Generated by <strong>AI Prompt Dictionary</strong> 🤖</p>
<p style="color: var(--text-secondary); font-size: 0.9rem;">Made with ❤️ for developers learning npm</p>
</div>
</div>
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