Install an exact version of a package
📦 Node.js-> Command Line
✨ The Prompt Phrase
npm install --save-exact lodash
💻 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>Install an exact version of a package - 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-npm: #cb3837;
--text-primary: #f8fafc;
--text-secondary: #94a3b8;
--gradient-exact: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
--gradient-version: linear-gradient(135deg, #ec4899 0%, #a855f7 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-exact);
width: 0%;
transition: width 0.3s ease;
}
.hero {
text-align: center;
padding: 100px 20px;
background: var(--gradient-exact);
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;
}
.exact-icon {
font-size: 5rem;
margin-bottom: 20px;
animation: exactBounce 2s ease-in-out infinite;
}
@keyframes exactBounce {
0%, 100% { transform: translateY(0) scale(1); }
50% { transform: translateY(-15px) scale(1.1); }
}
.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: 1.3rem;
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-exact);
-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-flag { color: #10b981; font-weight: 600; }
.code-version { color: #f59e0b; 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-exact);
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-green);
transform: translateY(-10px);
}
.feature-icon {
font-size: 3.5rem;
margin-bottom: 15px;
}
.feature-title {
font-weight: 600;
color: var(--accent-green);
margin-bottom: 10px;
font-size: 1.3rem;
}
.demo-container {
background: var(--bg-secondary);
border-radius: 20px;
padding: 40px;
margin: 30px 0;
}
.version-simulator {
background: var(--bg-card);
border-radius: 15px;
padding: 30px;
margin: 30px 0;
border: 2px solid var(--accent-green);
}
.version-display {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
gap: 20px;
margin: 20px 0;
}
.version-card {
background: var(--bg-secondary);
padding: 20px;
border-radius: 12px;
text-align: center;
border: 2px solid transparent;
transition: all 0.3s ease;
}
.version-card.exact {
border-color: var(--accent-green);
background: rgba(16, 185, 129, 0.1);
}
.version-card.range {
border-color: var(--accent-yellow);
background: rgba(245, 158, 11, 0.1);
}
.version-number {
font-size: 2rem;
font-weight: 700;
font-family: 'Fira Code', monospace;
margin: 10px 0;
}
.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);
}
.terminal-success {
color: var(--accent-green);
font-weight: 600;
}
.demo-button {
background: var(--gradient-exact);
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(16, 185, 129, 0.4);
}
.comparison-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
margin: 30px 0;
}
.comparison-item {
background: var(--bg-secondary);
padding: 25px;
border-radius: 15px;
border: 2px solid transparent;
}
.comparison-item.without {
border-color: var(--accent-yellow);
}
.comparison-item.with {
border-color: var(--accent-green);
}
.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-exact);
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-exact);
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-exact);
border-radius: 20px;
font-size: 0.85rem;
font-weight: 600;
margin: 5px;
}
.confetti {
position: fixed;
width: 10px;
height: 10px;
background: var(--accent-green);
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; }
.comparison-grid { 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="exact-icon">🎯</div>
<h1>Master Exact Versions!</h1>
<div class="command-display">npm install --save-exact lodash</div>
<p>Lock down your dependencies precisely! 🔒</p>
</div>
</div>
<div class="container">
<!-- What Is It -->
<section class="section">
<h2 class="section-title">🤔 What Is This Command?</h2>
<div class="card">
<p style="font-size: 1.2rem; margin-bottom: 20px;">
This command installs the <span class="highlight">lodash</span> package and saves it with an <strong>exact version number</strong> in your package.json - no version ranges, no surprises! 🎯
</p>
<p style="margin-bottom: 20px;">
Think of it like ordering a pizza with EXACT toppings! 🍕 Instead of saying "some pepperoni" (which could be 5 slices or 50), you say "exactly 12 pepperoni slices." With <code>--save-exact</code>, you're telling npm: "Give me version 4.17.21, not 4.17.x or ^4.17.21 - EXACTLY 4.17.21!"
</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 install</code> - Install a package</li>
<li><code class="code-flag">--save-exact</code> - Save with exact version (no ^ or ~)</li>
<li><code>lodash</code> - The package name (example)</li>
<li>Result in package.json: <code>"lodash": "4.17.21"</code> (not <code>^4.17.21</code>)</li>
</ul>
</div>
<div style="margin-top: 30px;">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">What's the Difference? 🔍</h3>
<p><strong>Without --save-exact:</strong> <code>"lodash": "^4.17.21"</code> (allows 4.17.22, 4.18.0, 4.99.0)</p>
<p><strong>With --save-exact:</strong> <code>"lodash": "4.17.21"</code> (ONLY 4.17.21, nothing else!)</p>
</div>
</div>
</section>
<!-- Version Comparison -->
<section class="section">
<h2 class="section-title">📊 Version Comparison</h2>
<div class="card">
<div class="version-simulator">
<h3 style="margin-bottom: 20px; text-align: center;">See The Difference! 🎭</h3>
<div class="version-display">
<div class="version-card range">
<div style="font-size: 2.5rem; margin-bottom: 10px;">🌊</div>
<h4 style="color: var(--accent-yellow); margin-bottom: 10px;">Without --save-exact</h4>
<div class="version-number">^4.17.21</div>
<p style="color: var(--text-secondary); font-size: 0.9rem;">Allows updates!</p>
<p style="margin-top: 10px; font-size: 0.85rem;">Could install: 4.17.22, 4.18.0, 4.99.0</p>
</div>
<div class="version-card exact">
<div style="font-size: 2.5rem; margin-bottom: 10px;">🎯</div>
<h4 style="color: var(--accent-green); margin-bottom: 10px;">With --save-exact</h4>
<div class="version-number">4.17.21</div>
<p style="color: var(--text-secondary); font-size: 0.9rem;">Locked down!</p>
<p style="margin-top: 10px; font-size: 0.85rem;">Will ONLY install: 4.17.21</p>
</div>
</div>
</div>
</div>
</section>
<!-- Why Use It -->
<section class="section">
<h2 class="section-title">✨ Why Use --save-exact?</h2>
<div class="card">
<div class="feature-grid">
<div class="feature-card">
<div class="feature-icon">🔒</div>
<div class="feature-title">Predictability</div>
<p style="color: var(--text-secondary);">Same version everywhere!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🛡️</div>
<div class="feature-title">No Surprises</div>
<p style="color: var(--text-secondary);">Prevent breaking changes!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🐛</div>
<div class="feature-title">Reproducible Builds</div>
<p style="color: var(--text-secondary);">Same bugs, same fixes!</p>
</div>
<div class="feature-card">
<div class="feature-icon">👥</div>
<div class="feature-title">Team Consistency</div>
<p style="color: var(--text-secondary);">Everyone uses same version!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🚀</div>
<div class="feature-title">Production Safety</div>
<p style="color: var(--text-secondary);">No unexpected updates!</p>
</div>
<div class="feature-card">
<div class="feature-icon">🔍</div>
<div class="feature-title">Easy Debugging</div>
<p style="color: var(--text-secondary);">Know exact versions!</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: Command Parsed</h3>
<p>npm reads the --save-exact flag.</p>
</div>
<div class="step">
<h3>Step 2: Package Downloaded</h3>
<p>Downloads lodash from npm registry.</p>
</div>
<div class="step">
<h3>Step 3: Version Determined</h3>
<p>Gets the latest version (e.g., 4.17.21).</p>
</div>
<div class="step">
<h3>Step 4: Exact Version Saved</h3>
<p>Writes "4.17.21" to package.json (no ^ or ~).</p>
</div>
<div class="step">
<h3>Step 5: Package Installed</h3>
<p>Installs to node_modules directory.</p>
</div>
<div class="step">
<h3>Step 6: Lock File Updated</h3>
<p>Updates package-lock.json with exact version! 🎉</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 What Gets Saved! 🔍</h4>
<button class="demo-button" onclick="simulateWithout()">
<span>🌊</span>
<span>Without --save-exact</span>
</button>
<button class="demo-button" onclick="simulateWith()">
<span>🎯</span>
<span>With --save-exact</span>
</button>
<button class="demo-button" onclick="simulateComparison()">
<span>⚖️</span>
<span>Side-by-Side</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 install 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('multiple')">Multiple Packages</button>
<button class="tab" onclick="switchTab('config')">Config Setting</button>
<button class="tab" onclick="switchTab('comparison')">Before/After</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"># Install with exact version</span>
npm install --save-exact lodash
<span class="code-comment"># Short form (same thing)</span>
npm install -E lodash
<span class="code-comment"># Result in package.json:</span>
{
<span class="code-string">"dependencies"</span>: {
<span class="code-string">"lodash"</span>: <span class="code-version">"4.17.21"</span> <span class="code-comment">// No ^ or ~!</span>
}
}</code></pre>
</div>
<div class="success" style="margin-top: 15px;">
<strong>Result:</strong> Exact version locked in package.json!
</div>
</div>
<div id="multiple" class="tab-content">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">Multiple Packages</h3>
<div class="code-block">
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<div class="terminal-dot dot-red"></div>
<div class="terminal-dot dot-yellow"></div>
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</div>
<pre><code id="multiple-code"><span class="code-comment"># Install multiple packages with exact versions</span>
npm install --save-exact lodash express axios
<span class="code-comment"># Install as dev dependencies</span>
npm install --save-exact --save-dev jest eslint
<span class="code-comment"># Result in package.json:</span>
{
<span class="code-string">"dependencies"</span>: {
<span class="code-string">"lodash"</span>: <span class="code-version">"4.17.21"</span>,
<span class="code-string">"express"</span>: <span class="code-version">"4.18.2"</span>,
<span class="code-string">"axios"</span>: <span class="code-version">"1.4.0"</span>
},
<span class="code-string">"devDependencies"</span>: {
<span class="code-string">"jest"</span>: <span class="code-version">"29.5.0"</span>,
<span class="code-string">"eslint"</span>: <span class="code-version">"8.42.0"</span>
}
}</code></pre>
</div>
</div>
<div id="config" class="tab-content">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">Make It Default!</h3>
<div class="code-block">
<div class="code-header">
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<div class="terminal-dot dot-red"></div>
<div class="terminal-dot dot-yellow"></div>
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<button class="copy-btn" onclick="copyCode('config-code')">📋 Copy</button>
</div>
<pre><code id="config-code"><span class="code-comment"># Set save-exact as default for all installs</span>
npm config set save-exact true
<span class="code-comment"># Now all installs use exact versions automatically!</span>
npm install lodash <span class="code-comment"># Will save as "4.17.21" not "^4.17.21"</span>
<span class="code-comment"># Check your config</span>
npm config get save-exact
<span class="code-comment"># Output: true</span>
<span class="code-comment"># Disable it (go back to default)</span>
npm config set save-exact false</code></pre>
</div>
<div class="tip" style="margin-top: 15px;">
<strong>Pro Tip:</strong> Set this globally to always use exact versions!
</div>
</div>
<div id="comparison" class="tab-content">
<h3 style="color: var(--accent-pink); margin-bottom: 15px;">Before & After Comparison</h3>
<div class="comparison-grid">
<div class="comparison-item without">
<h4 style="color: var(--accent-yellow); margin-bottom: 15px;">❌ Without --save-exact</h4>
<div class="code-block" style="margin-top: 15px;">
<pre><code><span class="code-comment">// package.json</span>
{
<span class="code-string">"dependencies"</span>: {
<span class="code-string">"lodash"</span>: <span class="code-string">"^4.17.21"</span>
}
}
<span class="code-comment">// ^ means: 4.17.21 to <5.0.0</span>
<span class="code-comment">// Could install:</span>
<span class="code-comment">// 4.17.22, 4.18.0, 4.99.0</span></code></pre>
</div>
</div>
<div class="comparison-item with">
<h4 style="color: var(--accent-green); margin-bottom: 15px;">✅ With --save-exact</h4>
<div class="code-block" style="margin-top: 15px;">
<pre><code><span class="code-comment">// package.json</span>
{
<span class="code-string">"dependencies"</span>: {
<span class="code-string">"lodash"</span>: <span class="code-string">"4.17.21"</span>
}
}
<span class="code-comment">// No prefix = exact version</span>
<span class="code-comment">// Will ONLY install:</span>
<span class="code-comment">// 4.17.21 (nothing else!)</span></code></pre>
</div>
</div>
</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 the Flag</strong></span>
<span class="accordion-icon">▼</span>
</div>
<div class="accordion-content">
<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> Running <code>npm install lodash</code> without --save-exact
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Always add <code>--save-exact</code> or set it as default in config!
</div>
</div>
</div>
</div>
<div class="accordion-item">
<div class="accordion-header" onclick="toggleAccordion(this)">
<span><strong>2. Mixing Exact and Range Versions</strong></span>
<span class="accordion-icon">▼</span>
</div>
<div class="accordion-content">
<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> Some packages exact, others with ^ or ~
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Be consistent! Use exact versions for all or none!
</div>
</div>
</div>
</div>
<div class="accordion-item">
<div class="accordion-header" onclick="toggleAccordion(this)">
<span><strong>3. Not Updating package-lock.json</strong></span>
<span class="accordion-icon">▼</span>
</div>
<div class="accordion-content">
<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> Manually editing package.json without reinstalling
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Always run <code>npm install</code> after manual edits!
</div>
</div>
</div>
</div>
<div class="accordion-item">
<div class="accordion-header" onclick="toggleAccordion(this)">
<span><strong>4. Never Updating Dependencies</strong></span>
<span class="accordion-icon">▼</span>
</div>
<div class="accordion-content">
<div class="accordion-body">
<div class="warning">
<strong>Problem:</strong> Using exact versions means no automatic security updates
</div>
<div class="success" style="margin-top: 15px;">
<strong>Solution:</strong> Regularly check for updates with <code>npm outdated</code> and update manually!
</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>Set as default</strong> - Run <code>npm config set save-exact true</code> to always use exact versions!
</div>
<div class="tip">
<strong>Use with CI/CD</strong> - Exact versions ensure consistent builds across environments!
</div>
<div class="tip">
<strong>Short form</strong> - Use <code>-E</code> instead of <code>--save-exact</code> to save typing!
</div>
<div class="tip">
<strong>Check outdated</strong> - Run <code>npm outdated</code> regularly to see what needs updating!
</div>
<div class="tip">
<strong>Security updates</strong> - Use <code>npm audit</code> to check for vulnerabilities in exact versions!
</div>
<div class="tip">
<strong>Team agreement</strong> - Decide as a team: exact versions or ranges? Be consistent!
</div>
<div class="tip">
<strong>Lock file matters</strong> - Even with exact versions, commit package-lock.json for true reproducibility!
</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 --save-exact do?</h3>
<div class="quiz-options">
<div class="quiz-option" onclick="checkAnswer(this, false, 1)">A) Installs the latest version</div>
<div class="quiz-option" onclick="checkAnswer(this, true, 1)">B) Saves version without ^ or ~ prefix</div>
<div class="quiz-option" onclick="checkAnswer(this, false, 1)">C) Creates a backup of package.json</div>
</div>
<div class="quiz-feedback" id="feedback1"></div>
</div>
<div class="quiz-question">
<h3>Question 2: What's the short form of --save-exact?</h3>
<div class="quiz-options">
<div class="quiz-option" onclick="checkAnswer(this, false, 2)">A) -S</div>
<div class="quiz-option" onclick="checkAnswer(this, true, 2)">B) -E</div>
<div class="quiz-option" onclick="checkAnswer(this, false, 2)">C) -X</div>
</div>
<div class="quiz-feedback" id="feedback2"></div>
</div>
<div class="quiz-question">
<h3>Question 3: How to make --save-exact default?</h3>
<div class="quiz-options">
<div class="quiz-option" onclick="checkAnswer(this, false, 3)">A) Edit package.json</div>
<div class="quiz-option" onclick="checkAnswer(this, true, 3)">B) npm config set save-exact true</div>
<div class="quiz-option" onclick="checkAnswer(this, false, 3)">C) Add to .npmrc manually</div>
</div>
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<h3 style="color: var(--accent-green); font-size: 1.5rem;">🎉 Quiz Complete!</h3>
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</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;">--save-exact Cheat Sheet! 🔖</h3>
<div class="cheat-grid">
<div class="cheat-item">
<h4>🎯 Basic Command</h4>
<p><code>npm install --save-exact lodash</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Install with exact version</p>
</div>
<div class="cheat-item">
<h4>⚡ Short Form</h4>
<p><code>npm install -E lodash</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Same as --save-exact</p>
</div>
<div class="cheat-item">
<h4>🔧 Set Default</h4>
<p><code>npm config set save-exact true</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Always use exact</p>
</div>
<div class="cheat-item">
<h4>📦 Multiple Packages</h4>
<p><code>npm i -E pkg1 pkg2</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Install many at once</p>
</div>
<div class="cheat-item">
<h4>✅ Result</h4>
<p><code>"lodash": "4.17.21"</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">No ^ or ~ prefix</p>
</div>
<div class="cheat-item">
<h4>🌊 Without Flag</h4>
<p><code>"lodash": "^4.17.21"</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">Allows updates</p>
</div>
<div class="cheat-item">
<h4>🔍 Check Outdated</h4>
<p><code>npm outdated</code></p>
<p style="font-size: 0.85rem; margin-top: 5px;">See what to update</p>
</div>
<div class="cheat-item">
<h4>🛡️ Best For</h4>
<p>Production apps</p>
<p style="font-size: 0.85rem; margin-top: 5px;">Predictable builds</p>
</div>
</div>
</div>
</section>
<!-- Footer -->
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<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>--save-exact</strong>! 🚀</p>
<div style="margin: 30px 0;">
<span class="badge">🎯 Precision Master</span>
<span class="badge">🔒 Version Locker</span>
<span class="badge">🚀 npm Expert</span>
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<p style="color: var(--text-secondary); margin-top: 30px;">Generated by <strong>AI Prompt Dictionary</strong> 🤖</p>
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