Remove extraneous packages not in package.json
📦 Node.js-> Command Line
✨ The Prompt Phrase
npm prune
💻 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>Remove extraneous packages not 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;
--accent-rose: #f43f5e;
--text-primary: #f8fafc;
--text-secondary: #94a3b8;
--gradient-prune: linear-gradient(135deg, #f43f5e 0%, #ef4444 100%);
--gradient-clean: linear-gradient(135deg, #ef4444 0%, #dc2626 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-prune);
width: 0%;
transition: width 0.3s ease;
}
.hero {
text-align: center;
padding: 100px 20px;
background: var(--gradient-prune);
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;
}
.prune-icon {
font-size: 5rem;
margin-bottom: 20px;
animation: pruneShake 3s ease-in-out infinite;
}
@keyframes pruneShake {
0%, 100% { transform: scale(1) rotate(0deg); }
25% { transform: scale(1.1) rotate(-10deg); }
50% { transform: scale(1) rotate(0deg); }
75% { transform: scale(1.1) rotate(10deg); }
}
.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: 1.5rem;
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-prune);
-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-npm { color: #cb3837; font-weight: 600; }
.code-prune { color: #f43f5e; font-weight: 600; }
.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-prune);
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-rose);
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-rose);
transform: translateY(-10px);
}
.feature-icon {
font-size: 3.5rem;
margin-bottom: 15px;
}
.feature-title {
font-weight: 600;
color: var(--accent-rose);
margin-bottom: 10px;
font-size: 1.3rem;
}
.demo-container {
background: var(--bg-secondary);
border-radius: 20px;
padding: 40px;
margin: 30px 0;
}
.before-after {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
margin: 30px 0;
}
.before-box, .after-box {
background: var(--bg-card);
padding: 25px;
border-radius: 15px;
}
.before-box {
border: 2px solid var(--accent-red);
}
.after-box {
border: 2px solid var(--accent-green);
}
.package-item {
display: flex;
align-items: center;
gap: 10px;
padding: 10px;
margin: 5px 0;
background: var(--bg-secondary);
border-radius: 8px;
}
.package-item.extraneous {
opacity: 0.5;
text-decoration: line-through;
}
.terminal {
background: #1e1e1e;
border-radius: 15px;
padding: 20px;
font-family: 'Fira Code', monospace;
min-height: 250px;
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-prune);
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(244, 63, 94, 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-prune);
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-prune);
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-prune);
border-radius: 20px;
font-size: 0.85rem;
font-weight: 600;
margin: 5px;
}
.confetti {
position: fixed;
width: 10px;
height: 10px;
background: var(--accent-rose);
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: 1rem; 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; }
.before-after { grid-template-columns: 1fr; }
}
</style>
</head>
<body>
<div class="progress-container">
<div class="progress-bar" id="progressBar"></div>
</div>
<div class="hero">
<div class="hero-content">
<div class="prune-icon">✂️</div>
<h1>Master npm prune!</h1>
<div class="command-display">npm prune</div>
<p>Clean up unused packages! 🧹</p>
</div>
</div>
<div class="container">
<!-- What Is It -->
<section class="section">
<h2 class="section-title">🤔 What Is npm prune?</h2>
<div class="card">
<p style="font-size: 1.2rem; margin-bottom: 20px;">
<code>npm prune</code> <span class="highlight">removes packages from node_modules</span> that are NOT listed in your package.json! It's like cleaning out your closet - getting rid of clothes you don't wear anymore! ✂️
</p>
<p style="margin-bottom: 20px;">
Think of it like Marie Kondo for your dependencies! 🧹 Sometimes packages end up in node_modules that aren't actually needed - maybe you uninstalled them from package.json but the files are still there, or they were manually added. <code>npm prune</code> removes these "extraneous" packages, keeping only what's declared in your package.json!
</p>
<div class="info">
<strong>Breaking It Down:</strong>
<ul style="margin-left: 30px; margin-top: 10px; line-height: 2;">
<li><code class="code-npm">npm</code> - Node Package Manager</li>
<li><code class="code-prune">prune</code> - Remove/trim unnecessary items</li>
<li>Removes packages NOT in package.json</li>
<li>Cleans up node_modules folder</li>
<li>Frees up disk space</li>
</ul>
</div>
<div style="margin-top: 30px;">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">What Are Extraneous Packages? 🔍</h3>
<p>Extraneous packages are those installed in node_modules but NOT listed in package.json dependencies or devDependencies. They're orphaned packages that serve no purpose and just take up space!</p>
</div>
</div>
</section>
<!-- Before/After Visual -->
<section class="section">
<h2 class="section-title">📊 Before vs After</h2>
<div class="card">
<h3 style="margin-bottom: 20px; text-align: center;">See The Cleanup! 🎯</h3>
<div class="before-after">
<div class="before-box">
<h4 style="color: var(--accent-red); margin-bottom: 15px;">❌ Before Prune</h4>
<div class="package-item">
<span>📦</span>
<span>express (in package.json)</span>
</div>
<div class="package-item">
<span>📦</span>
<span>lodash (in package.json)</span>
</div>
<div class="package-item extraneous">
<span>📦</span>
<span>old-package (extraneous)</span>
</div>
<div class="package-item extraneous">
<span>📦</span>
<span>unused-lib (extraneous)</span>
</div>
<p style="margin-top: 15px; font-size: 0.9rem; color: var(--text-secondary);">😰 Cluttered with unused packages</p>
</div>
<div class="after-box">
<h4 style="color: var(--accent-green); margin-bottom: 15px;">✅ After Prune</h4>
<div class="package-item">
<span>📦</span>
<span>express (in package.json)</span>
</div>
<div class="package-item">
<span>📦</span>
<span>lodash (in package.json)</span>
</div>
<p style="margin-top: 15px; font-size: 0.9rem; color: var(--text-secondary);">🎉 Clean and organized!</p>
</div>
</div>
</div>
</section>
<!-- Why Use It -->
<section class="section">
<h2 class="section-title">✨ Why Use npm prune?</h2>
<div class="card">
<div class="feature-grid">
<div class="feature-card">
<div class="feature-icon">🧹</div>
<div class="feature-title">Clean Up</div>
<p style="color: var(--text-secondary);">Remove unused packages!</p>
</div>
<div class="feature-card">
<div class="feature-icon">💾</div>
<div class="feature-title">Save Space</div>
<p style="color: var(--text-secondary);">Free up disk space!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🎯</div>
<div class="feature-title">Match package.json</div>
<p style="color: var(--text-secondary);">Sync dependencies!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🚀</div>
<div class="feature-title">Faster Installs</div>
<p style="color: var(--text-secondary);">Less to process!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🔒</div>
<div class="feature-title">Security</div>
<p style="color: var(--text-secondary);">Remove old vulnerabilities!</p>
</div>
<div class="feature-card">
<div class="feature-icon">📦</div>
<div class="feature-title">Production Ready</div>
<p style="color: var(--text-secondary);">Clean deployments!</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: Read package.json</h3>
<p>npm reads your dependencies and devDependencies.</p>
</div>
<div class="step">
<h3>Step 2: Scan node_modules</h3>
<p>Checks what's actually installed in node_modules.</p>
</div>
<div class="step">
<h3>Step 3: Compare Lists</h3>
<p>Identifies packages in node_modules but NOT in package.json.</p>
</div>
<div class="step">
<h3>Step 4: Mark Extraneous</h3>
<p>Flags these packages as "extraneous" (unnecessary).</p>
</div>
<div class="step">
<h3>Step 5: Delete Files</h3>
<p>Removes extraneous packages from node_modules.</p>
</div>
<div class="step">
<h3>Step 6: Done!</h3>
<p>Clean node_modules matching package.json! 🎉</p>
</div>
</div>
</div>
</section>
<!-- Live Demo -->
<section class="section">
<h2 class="section-title">🎮 Interactive Demo</h2>
<div class="demo-container">
<div style="margin-bottom: 30px; text-align: center;">
<h4 style="margin-bottom: 15px;">See npm prune in Action! ✂️</h4>
<button class="demo-button" onclick="simulatePrune()">
<span>✂️</span>
<span>Run npm prune</span>
</button>
<button class="demo-button" onclick="simulateProduction()">
<span>🏭</span>
<span>Production Prune</span>
</button>
<button class="demo-button" onclick="simulateDryRun()">
<span>👀</span>
<span>Dry Run</span>
</button>
</div>
<div class="terminal" id="terminal">
<div class="terminal-line">
<span class="terminal-prompt">$</span>
<span style="color: var(--text-secondary);"> Ready to prune packages...</span>
</div>
</div>
</div>
</section>
<!-- Code Breakdown -->
<section class="section">
<h2 class="section-title">💻 Usage Examples</h2>
<div class="card">
<div class="tabs">
<button class="tab active" onclick="switchTab('basic')">Basic Usage</button>
<button class="tab" onclick="switchTab('production')">Production</button>
<button class="tab" onclick="switchTab('scenarios')">Common Scenarios</button>
<button class="tab" onclick="switchTab('options')">Options</button>
</div>
<div id="basic" class="tab-content active">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">Basic Usage</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('basic-code')">📋 Copy</button>
</div>
<pre><code id="basic-code"><span class="code-comment"># Remove extraneous packages</span>
npm prune
<span class="code-comment"># What it does:</span>
<span class="code-comment"># - Reads package.json</span>
<span class="code-comment"># - Compares with node_modules</span>
<span class="code-comment"># - Removes packages NOT in package.json</span>
<span class="code-comment"># When to use:</span>
<span class="code-comment"># ✅ After removing dependencies from package.json</span>
<span class="code-comment"># ✅ Before deploying to production</span>
<span class="code-comment"># ✅ To clean up disk space</span>
<span class="code-comment"># ✅ After manual package deletions</span></code></pre>
</div>
<div class="success" style="margin-top: 15px;">
<strong>Result:</strong> Clean node_modules matching package.json!
</div>
</div>
<div id="production" class="tab-content">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">Production Deployment</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>
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<pre><code id="production-code"><span class="code-comment"># Remove devDependencies for production</span>
npm prune --production
<span class="code-comment"># or</span>
npm prune --omit=dev
<span class="code-comment"># This removes:</span>
<span class="code-comment"># - All devDependencies</span>
<span class="code-comment"># - Extraneous packages</span>
<span class="code-comment"># Keeps only production dependencies!</span>
<span class="code-comment"># Perfect for Docker builds:</span>
<span class="code-comment"># Dockerfile:</span>
FROM node:18
COPY package*.json ./
RUN npm ci --only=production
RUN npm prune --production
COPY . .
<span class="code-comment"># CI/CD pipeline:</span>
npm ci
npm run build
npm prune --production <span class="code-comment"># Remove dev deps before deploy</span></code></pre>
</div>
<div class="tip" style="margin-top: 15px;">
<strong>Pro Tip:</strong> Always prune devDependencies in production for smaller deployments!
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<h3 style="color: var(--accent-pink); margin-bottom: 15px;">Common Scenarios</h3>
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<pre><code id="scenarios-code"><span class="code-comment"># Scenario 1: After uninstalling packages</span>
npm uninstall old-package
npm prune <span class="code-comment"># Clean up any leftovers</span>
<span class="code-comment"># Scenario 2: Clean up after git pull</span>
git pull
npm install
npm prune <span class="code-comment"># Remove packages no longer needed</span>
<span class="code-comment"># Scenario 3: Before deployment</span>
npm run build
npm prune --production
<span class="code-comment"># Deploy clean production build</span>
<span class="code-comment"># Scenario 4: Check what would be removed (dry run)</span>
npm prune --dry-run
<span class="code-comment"># Shows what would be removed without actually removing</span>
<span class="code-comment"># Scenario 5: After manual node_modules edits</span>
<span class="code-comment"># (never do this, but if you did...)</span>
npm prune <span class="code-comment"># Restore consistency</span>
<span class="code-comment"># Scenario 6: Monorepo workspace cleanup</span>
npm prune --workspaces</code></pre>
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<h3 style="color: var(--accent-pink); margin-bottom: 15px;">Available Options</h3>
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<pre><code id="options-code"><span class="code-comment"># Basic prune</span>
npm prune
<span class="code-comment"># Production mode (remove devDependencies)</span>
npm prune --production
npm prune --omit=dev
<span class="code-comment"># Dry run (see what would be removed)</span>
npm prune --dry-run
<span class="code-comment"># Verbose output</span>
npm prune --verbose
<span class="code-comment"># Silent mode</span>
npm prune --silent
<span class="code-comment"># For workspaces (monorepo)</span>
npm prune --workspaces
npm prune --workspace=package-a
<span class="code-comment"># JSON output</span>
npm prune --json
<span class="code-comment"># Combine options</span>
npm prune --production --dry-run --verbose</code></pre>
</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. Forgetting to Prune in Production</strong></span>
<span class="accordion-icon">▼</span>
</div>
<div class="accordion-content">
<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> Deploying with devDependencies wastes space and resources
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Always run <code>npm prune --production</code> before deploying!
</div>
</div>
</div>
</div>
<div class="accordion-item">
<div class="accordion-header" onclick="toggleAccordion(this)">
<span><strong>2. Not Using Dry Run First</strong></span>
<span class="accordion-icon">▼</span>
</div>
<div class="accordion-content">
<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> Accidentally removing packages you need
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Run <code>npm prune --dry-run</code> first to preview changes!
</div>
</div>
</div>
</div>
<div class="accordion-item">
<div class="accordion-header" onclick="toggleAccordion(this)">
<span><strong>3. Pruning Without Updating package.json</strong></span>
<span class="accordion-icon">▼</span>
</div>
<div class="accordion-content">
<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> Removing packages still needed but not in package.json
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Always update package.json properly with npm install/uninstall!
</div>
</div>
</div>
</div>
<div class="accordion-item">
<div class="accordion-header" onclick="toggleAccordion(this)">
<span><strong>4. Manual node_modules Edits</strong></span>
<span class="accordion-icon">▼</span>
</div>
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<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> Manually deleting from node_modules instead of using npm
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Always use npm commands, then prune to clean up!
</div>
</div>
</div>
</div>
</div>
</div>
</section>
<!-- Pro Tips -->
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<h2 class="section-title">🚀 Pro Tips</h2>
<div class="card">
<div class="tip">
<strong>Production deployments</strong> - Always use <code>--production</code> flag to remove devDependencies!
</div>
<div class="tip">
<strong>Dry run first</strong> - Use <code>--dry-run</code> to preview what will be removed!
</div>
<div class="tip">
<strong>After git pull</strong> - Run npm prune after pulling changes to clean up old packages!
</div>
<div class="tip">
<strong>CI/CD integration</strong> - Add prune step before deployment in pipelines!
</div>
<div class="tip">
<strong>Docker optimization</strong> - Prune in multi-stage builds for smaller images!
</div>
<div class="tip">
<strong>Regular maintenance</strong> - Run prune periodically to keep node_modules clean!
</div>
<div class="tip">
<strong>Workspace support</strong> - Use <code>--workspaces</code> flag for monorepos!
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<p style="margin-bottom: 30px; font-size: 1.1rem;">Test your understanding! 🧠</p>
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<h3>Question 1: What does npm prune remove?</h3>
<div class="quiz-options">
<div class="quiz-option" onclick="checkAnswer(this, false, 1)">A) All packages in node_modules</div>
<div class="quiz-option" onclick="checkAnswer(this, true, 1)">B) Packages NOT listed in package.json</div>
<div class="quiz-option" onclick="checkAnswer(this, false, 1)">C) Only devDependencies</div>
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<div class="quiz-feedback" id="feedback1"></div>
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<h3>Question 2: When should you use --production flag?</h3>
<div class="quiz-options">
<div class="quiz-option" onclick="checkAnswer(this, false, 2)">A) During development</div>
<div class="quiz-option" onclick="checkAnswer(this, true, 2)">B) Before deploying to production</div>
<div class="quiz-option" onclick="checkAnswer(this, false, 2)">C) Never</div>
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<h3>Question 3: What does --dry-run do?</h3>
<div class="quiz-options">
<div class="quiz-option" onclick="checkAnswer(this, false, 3)">A) Removes packages faster</div>
<div class="quiz-option" onclick="checkAnswer(this, true, 3)">B) Shows what would be removed without removing</div>
<div class="quiz-option" onclick="checkAnswer(this, false, 3)">C) Runs in silent mode</div>
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<h2 class="section-title">📚 Quick Reference</h2>
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<h3 style="margin-bottom: 20px; font-size: 2rem;">npm prune Cheat Sheet! 🔖</h3>
<div class="cheat-grid">
<div class="cheat-item">
<h4>✂️ Command</h4>
<p><code>npm prune</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Remove extraneous</p>
</div>
<div class="cheat-item">
<h4>🏭 Production</h4>
<p><code>npm prune --production</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Remove devDeps</p>
</div>
<div class="cheat-item">
<h4>👀 Dry Run</h4>
<p><code>npm prune --dry-run</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Preview only</p>
</div>
<div class="cheat-item">
<h4>🎯 Purpose</h4>
<p>Clean node_modules</p>
<p style="font-size: 0.85rem; margin-top: 5px;">Match package.json</p>
</div>
<div class="cheat-item">
<h4>🔍 Removes</h4>
<p>Extraneous packages</p>
<p style="font-size: 0.85rem; margin-top: 5px;">Not in package.json</p>
</div>
<div class="cheat-item">
<h4>✅ Use When</h4>
<p>After uninstall, before deploy</p>
<p style="font-size: 0.85rem; margin-top: 5px;">Regular cleanup</p>
</div>
<div class="cheat-item">
<h4>💾 Benefits</h4>
<p>Save space, faster builds</p>
<p style="font-size: 0.85rem; margin-top: 5px;">Clean deploys</p>
</div>
<div class="cheat-item">
<h4>🚀 Pro Tip</h4>
<p>Always --production for prod</p>
<p style="font-size: 0.85rem; margin-top: 5px;">Dry run first!</p>
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<p style="font-size: 1.2rem; margin-bottom: 20px;">You now understand <strong>npm prune</strong>! 🚀</p>
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