Verify NPM existence through command line.
📦 Node.js-> Command Line
✨ The Prompt Phrase
npm -v
💻 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>📦 Verify NPM Existence</title>
<link href="https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;800&family=Fira+Code:wght@400;500&display=swap" rel="stylesheet">
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
--npm: #cb3837;
--cyan: #06b6d4;
--purple: #8b5cf6;
--pink: #ec4899;
--orange: #f97316;
--yellow: #fbbf24;
--blue: #3b82f6;
--green: #10b981;
--red: #ef4444;
--bg: #0a0e1a;
--card: #151b2e;
--text: #e2e8f0;
}
body {
font-family: 'Poppins', sans-serif;
background: var(--bg);
color: var(--text);
min-height: 100vh;
overflow-x: hidden;
}
/* Animated background */
.bg-animation {
position: fixed;
inset: 0;
z-index: -1;
overflow: hidden;
}
.float-package {
position: absolute;
font-size: 2.5rem;
opacity: 0.08;
animation: packageFloat 20s infinite ease-in-out;
}
@keyframes packageFloat {
0%, 100% { transform: translate(0, 0) rotate(0deg); }
25% { transform: translate(100px, -80px) rotate(90deg); }
50% { transform: translate(180px, 60px) rotate(180deg); }
75% { transform: translate(-70px, 140px) rotate(270deg); }
}
.orb {
position: absolute;
border-radius: 50%;
filter: blur(110px);
opacity: 0.13;
animation: orbMove 30s ease-in-out infinite;
}
@keyframes orbMove {
0%, 100% { transform: translate(0, 0) scale(1); }
50% { transform: translate(130px, -90px) scale(1.4); }
}
/* Progress bar */
.progress {
position: fixed;
top: 0;
left: 0;
height: 4px;
background: linear-gradient(90deg, var(--npm), var(--orange), var(--yellow));
z-index: 1000;
transition: width 0.2s;
}
/* Header */
header {
text-align: center;
padding: 70px 20px 50px;
position: relative;
}
.logo-container {
display: flex;
justify-content: center;
align-items: center;
gap: 25px;
margin-bottom: 35px;
flex-wrap: wrap;
}
.npm-logo {
width: 120px;
height: 120px;
background: linear-gradient(135deg, var(--npm), var(--red));
border-radius: 26px;
display: flex;
align-items: center;
justify-content: center;
font-size: 4rem;
cursor: pointer;
transition: all 0.3s;
box-shadow: 0 20px 60px rgba(203, 56, 55, 0.4);
animation: logoFloat 4s ease-in-out infinite;
position: relative;
overflow: hidden;
}
@keyframes logoFloat {
0%, 100% { transform: translateY(0) rotate(0deg); }
50% { transform: translateY(-18px) rotate(-5deg); }
}
.npm-logo::before {
content: '';
position: absolute;
inset: 0;
background: linear-gradient(45deg, transparent, rgba(255,255,255,0.3), transparent);
animation: shine 3s infinite;
}
@keyframes shine {
0% { transform: translateX(-100%) rotate(45deg); }
100% { transform: translateX(200%) rotate(45deg); }
}
.npm-logo:hover {
transform: scale(1.15) rotate(10deg);
box-shadow: 0 30px 80px rgba(203, 56, 55, 0.6);
}
.command-badge {
background: rgba(6, 182, 212, 0.15);
border: 2px solid var(--cyan);
border-radius: 14px;
padding: 12px 25px;
font-family: 'Fira Code', monospace;
font-size: 1rem;
animation: badgePulse 3s ease-in-out infinite;
color: var(--cyan);
font-weight: 600;
}
@keyframes badgePulse {
0%, 100% { box-shadow: 0 0 20px rgba(6, 182, 212, 0.3); }
50% { box-shadow: 0 0 40px rgba(6, 182, 212, 0.6); }
}
h1 {
font-size: clamp(2rem, 6vw, 3.5rem);
font-weight: 800;
background: linear-gradient(135deg, var(--npm), var(--orange), var(--yellow));
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
margin-bottom: 18px;
line-height: 1.2;
}
.subtitle {
color: #64748b;
font-size: 1.2rem;
max-width: 700px;
margin: 0 auto;
}
/* Main container */
main {
max-width: 1100px;
margin: 0 auto;
padding: 20px;
}
.section {
margin-bottom: 55px;
opacity: 0;
transform: translateY(50px);
transition: all 0.8s ease-out;
}
.section.vis {
opacity: 1;
transform: translateY(0);
}
.sec-title {
display: flex;
align-items: center;
gap: 18px;
font-size: 1.7rem;
font-weight: 700;
margin-bottom: 22px;
}
.sec-icon {
width: 56px;
height: 56px;
border-radius: 16px;
display: flex;
align-items: center;
justify-content: center;
font-size: 1.6rem;
animation: iconBounce 3s ease-in-out infinite;
}
@keyframes iconBounce {
0%, 100% { transform: translateY(0) rotate(-3deg); }
50% { transform: translateY(-8px) rotate(3deg); }
}
/* Cards */
.card {
background: var(--card);
border-radius: 22px;
padding: 32px;
margin-bottom: 24px;
border: 1px solid rgba(255,255,255,0.08);
transition: all 0.3s;
position: relative;
overflow: hidden;
}
.card::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
height: 5px;
background: linear-gradient(90deg, var(--npm), var(--orange), var(--yellow));
}
.card:hover {
transform: translateY(-8px);
box-shadow: 0 30px 70px rgba(0,0,0,0.4);
border-color: var(--npm);
}
.card h3 {
color: var(--npm);
margin-bottom: 18px;
font-size: 1.4rem;
display: flex;
align-items: center;
gap: 12px;
}
.card p {
color: #94a3b8;
line-height: 1.9;
margin-bottom: 16px;
}
/* Featured card */
.featured {
background: linear-gradient(135deg, rgba(203, 56, 55, 0.15), rgba(249, 115, 22, 0.15));
border: 2px solid var(--npm);
}
.featured-badge {
position: absolute;
top: -14px;
right: 30px;
background: linear-gradient(135deg, var(--orange), var(--yellow));
color: #000;
padding: 7px 20px;
border-radius: 22px;
font-size: 0.75rem;
font-weight: 700;
animation: badgeGlow 2s ease-in-out infinite;
}
@keyframes badgeGlow {
0%, 100% { box-shadow: 0 0 20px rgba(249, 115, 22, 0.5); }
50% { box-shadow: 0 0 40px rgba(249, 115, 22, 0.8); }
}
/* Code blocks */
.code-block {
background: #0a0f1a;
border-radius: 18px;
overflow: hidden;
margin: 22px 0;
border: 1px solid rgba(255,255,255,0.08);
box-shadow: 0 15px 45px rgba(0,0,0,0.4);
}
.code-header {
background: rgba(0,0,0,0.4);
padding: 16px 22px;
display: flex;
align-items: center;
justify-content: space-between;
}
.code-dots {
display: flex;
gap: 8px;
}
.dot {
width: 13px;
height: 13px;
border-radius: 50%;
cursor: pointer;
transition: all 0.2s;
}
.dot:hover { transform: scale(1.4); }
.dot.r { background: #ff5f56; }
.dot.y { background: #ffbd2e; }
.dot.g { background: #27ca40; }
.code-lang {
color: var(--npm);
font-size: 0.9rem;
font-weight: 600;
font-family: 'Fira Code', monospace;
}
.code-copy {
background: rgba(255,255,255,0.1);
border: none;
padding: 8px 18px;
border-radius: 8px;
color: var(--text);
cursor: pointer;
font-size: 0.85rem;
transition: all 0.3s;
font-weight: 600;
}
.code-copy:hover {
background: var(--npm);
transform: translateY(-2px);
color: #fff;
}
.code-copy.copied { background: var(--green); }
.code-body {
padding: 24px;
font-family: 'Fira Code', monospace;
font-size: 0.9rem;
line-height: 2;
overflow-x: auto;
}
.kw { color: var(--purple); }
.str { color: var(--yellow); }
.num { color: var(--orange); }
.func { color: var(--cyan); }
.comment { color: #6b7280; font-style: italic; }
.var { color: var(--pink); }
.cmd { color: var(--npm); font-weight: 600; }
/* Command options */
.cmd-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
gap: 16px;
margin: 22px 0;
}
.cmd-card {
background: rgba(255,255,255,0.03);
padding: 22px;
border-radius: 14px;
border: 2px solid rgba(255,255,255,0.08);
cursor: pointer;
transition: all 0.3s;
}
.cmd-card:hover {
border-color: var(--npm);
background: rgba(203, 56, 55, 0.1);
transform: translateY(-5px);
}
.cmd-card-icon {
font-size: 2.5rem;
margin-bottom: 12px;
}
.cmd-card-title {
color: var(--npm);
font-weight: 600;
font-size: 1.1rem;
margin-bottom: 8px;
font-family: 'Fira Code', monospace;
}
.cmd-card-desc {
color: #64748b;
font-size: 0.85rem;
line-height: 1.6;
}
/* Info boxes */
.info {
padding: 22px;
border-radius: 16px;
margin: 20px 0;
display: flex;
gap: 16px;
align-items: flex-start;
}
.info.tip {
background: rgba(16, 185, 129, 0.12);
border-left: 4px solid var(--green);
}
.info.warn {
background: rgba(251, 191, 36, 0.12);
border-left: 4px solid var(--yellow);
}
.info.important {
background: rgba(203, 56, 55, 0.12);
border-left: 4px solid var(--npm);
}
.info.cool {
background: rgba(6, 182, 212, 0.12);
border-left: 4px solid var(--cyan);
}
.info-icon {
font-size: 1.5rem;
flex-shrink: 0;
animation: iconWiggle 2s ease-in-out infinite;
}
@keyframes iconWiggle {
0%, 100% { transform: rotate(0deg); }
25% { transform: rotate(-8deg); }
75% { transform: rotate(8deg); }
}
/* Interactive terminal */
.terminal-container {
background: linear-gradient(135deg, rgba(203, 56, 55, 0.1), rgba(6, 182, 212, 0.1));
border-radius: 22px;
padding: 35px;
border: 2px solid rgba(203, 56, 55, 0.3);
margin: 28px 0;
}
.terminal-title {
font-size: 1.5rem;
font-weight: 700;
color: var(--yellow);
margin-bottom: 22px;
text-align: center;
}
.terminal {
background: #0a0f1a;
border-radius: 16px;
overflow: hidden;
margin: 22px 0;
box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.term-header {
background: rgba(0,0,0,0.4);
padding: 14px 22px;
display: flex;
align-items: center;
gap: 10px;
}
.term-title {
flex: 1;
text-align: center;
color: #64748b;
font-size: 0.9rem;
font-weight: 600;
}
.term-body {
padding: 24px;
font-family: 'Fira Code', monospace;
font-size: 0.9rem;
min-height: 200px;
max-height: 500px;
overflow-y: auto;
}
.term-line {
margin-bottom: 10px;
animation: lineAppear 0.3s ease-out;
}
@keyframes lineAppear {
from { opacity: 0; transform: translateX(-10px); }
to { opacity: 1; transform: translateX(0); }
}
.prompt {
color: var(--npm);
font-weight: 600;
}
.cursor {
display: inline-block;
width: 10px;
height: 20px;
background: var(--npm);
animation: blink 1s infinite;
vertical-align: middle;
margin-left: 2px;
}
@keyframes blink {
0%, 50% { opacity: 1; }
51%, 100% { opacity: 0; }
}
/* Buttons */
.btn-group {
display: flex;
gap: 14px;
justify-content: center;
flex-wrap: wrap;
margin: 24px 0;
}
.btn {
background: linear-gradient(135deg, var(--npm), var(--orange));
border: none;
padding: 14px 30px;
border-radius: 14px;
color: white;
font-weight: 700;
cursor: pointer;
transition: all 0.3s;
display: flex;
align-items: center;
gap: 10px;
font-size: 1rem;
}
.btn:hover {
transform: translateY(-3px);
box-shadow: 0 15px 40px rgba(203, 56, 55, 0.5);
}
.btn.secondary {
background: linear-gradient(135deg, var(--cyan), var(--blue));
}
.btn.success {
background: linear-gradient(135deg, var(--green), var(--cyan));
}
/* Steps */
.steps {
display: flex;
flex-direction: column;
gap: 18px;
}
.step {
display: flex;
gap: 20px;
padding: 24px;
background: rgba(255,255,255,0.02);
border-radius: 16px;
border: 1px solid rgba(255,255,255,0.06);
cursor: pointer;
transition: all 0.3s;
}
.step:hover {
transform: translateX(12px);
border-color: var(--npm);
background: rgba(203, 56, 55, 0.1);
}
.step-num {
width: 48px;
height: 48px;
border-radius: 50%;
background: linear-gradient(135deg, var(--npm), var(--orange));
display: flex;
align-items: center;
justify-content: center;
font-weight: 800;
flex-shrink: 0;
font-size: 1.2rem;
box-shadow: 0 8px 25px rgba(203, 56, 55, 0.4);
}
.step-content h4 {
margin-bottom: 8px;
color: var(--text);
font-size: 1.1rem;
}
.step-content p {
color: #64748b;
font-size: 0.95rem;
margin: 0;
line-height: 1.6;
}
/* Result display */
.result-box {
background: rgba(16, 185, 129, 0.1);
border: 2px solid var(--green);
border-radius: 16px;
padding: 24px;
margin: 20px 0;
display: none;
}
.result-box.show {
display: block;
animation: slideDown 0.5s ease-out;
}
@keyframes slideDown {
from { opacity: 0; transform: translateY(-20px); }
to { opacity: 1; transform: translateY(0); }
}
.result-icon {
font-size: 3rem;
text-align: center;
margin-bottom: 15px;
}
.result-text {
text-align: center;
color: var(--green);
font-weight: 600;
font-size: 1.1rem;
}
/* Quiz */
.quiz {
background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(236, 72, 153, 0.1));
border-radius: 22px;
padding: 32px;
border: 2px solid rgba(139, 92, 246, 0.3);
}
.quiz-q {
font-size: 1.25rem;
font-weight: 600;
margin-bottom: 24px;
}
.quiz-opts {
display: flex;
flex-direction: column;
gap: 14px;
}
.quiz-opt {
padding: 18px 24px;
background: var(--card);
border-radius: 14px;
cursor: pointer;
transition: all 0.3s;
border: 2px solid transparent;
display: flex;
align-items: center;
gap: 16px;
}
.quiz-opt:hover {
border-color: var(--purple);
transform: translateX(10px);
}
.quiz-opt.correct {
border-color: var(--green);
background: rgba(16, 185, 129, 0.2);
}
.quiz-opt.wrong {
border-color: var(--red);
background: rgba(239, 68, 68, 0.2);
}
.opt-letter {
width: 36px;
height: 36px;
border-radius: 50%;
background: rgba(255,255,255,0.1);
display: flex;
align-items: center;
justify-content: center;
font-weight: 700;
}
.quiz-result {
margin-top: 20px;
padding: 20px;
border-radius: 14px;
text-align: center;
font-weight: 600;
display: none;
}
.quiz-result.show {
display: block;
animation: slideUp 0.5s ease-out;
}
@keyframes slideUp {
from { opacity: 0; transform: translateY(20px); }
to { opacity: 1; transform: translateY(0); }
}
/* FAB */
.fab {
position: fixed;
bottom: 30px;
right: 30px;
width: 64px;
height: 64px;
border-radius: 50%;
background: linear-gradient(135deg, var(--npm), var(--orange));
border: none;
cursor: pointer;
display: flex;
align-items: center;
justify-content: center;
font-size: 1.8rem;
color: white;
box-shadow: 0 15px 40px rgba(203, 56, 55, 0.5);
transition: all 0.3s;
z-index: 100;
opacity: 0;
visibility: hidden;
}
.fab.show { opacity: 1; visibility: visible; }
.fab:hover { transform: scale(1.2) rotate(15deg); }
/* Toast */
.toast {
position: fixed;
bottom: 120px;
left: 50%;
transform: translateX(-50%) translateY(120px);
background: var(--card);
padding: 18px 35px;
border-radius: 16px;
border: 2px solid var(--npm);
box-shadow: 0 20px 60px rgba(0,0,0,0.6);
transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
z-index: 1000;
opacity: 0;
max-width: 90%;
}
.toast.show {
transform: translateX(-50%) translateY(0);
opacity: 1;
}
/* Footer */
footer {
text-align: center;
padding: 50px 20px;
background: var(--card);
margin-top: 60px;
border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-icons {
display: flex;
justify-content: center;
gap: 20px;
margin-bottom: 20px;
}
.footer-icon {
width: 54px;
height: 54px;
border-radius: 50%;
background: rgba(255,255,255,0.08);
display: flex;
align-items: center;
justify-content: center;
font-size: 1.6rem;
cursor: pointer;
transition: all 0.3s;
}
.footer-icon:hover {
background: var(--npm);
transform: translateY(-8px);
}
@media (max-width: 768px) {
.cmd-grid { grid-template-columns: 1fr; }
.btn-group { flex-direction: column; }
.btn { width: 100%; justify-content: center; }
h1 { font-size: 2rem; }
}
</style>
</head>
<body>
<div class="progress" id="progress"></div>
<div class="bg-animation" id="bgAnim"></div>
<header>
<div class="logo-container">
<div class="npm-logo" onclick="celebrate()">📦</div>
<div class="command-badge">$ npm --version</div>
</div>
<h1>Verify NPM Existence</h1>
<p class="subtitle">Learn how to check if NPM is installed on your system! 🚀</p>
</header>
<main>
<!-- What is NPM -->
<section class="section" id="what">
<div class="sec-title">
<div class="sec-icon" style="background: linear-gradient(135deg, var(--npm), var(--orange));">📦</div>
<span>What is NPM?</span>
</div>
<div class="card featured">
<div class="featured-badge">⭐ ESSENTIAL</div>
<h3>🎯 Node Package Manager</h3>
<p>NPM (Node Package Manager) is the world's largest software registry. It comes bundled with Node.js and allows you to install, share, and manage JavaScript packages and dependencies.</p>
<div class="info cool">
<span class="info-icon">✨</span>
<div>
<strong>Why Verify NPM?</strong>
<p>Before starting any Node.js project, you need to verify that NPM is installed and working correctly on your system!</p>
</div>
</div>
</div>
</section>
<!-- Basic Verification -->
<section class="section" id="basic">
<div class="sec-title">
<div class="sec-icon" style="background: linear-gradient(135deg, var(--cyan), var(--blue));">✅</div>
<span>Basic Verification Command</span>
</div>
<div class="card">
<h3>🔍 Check NPM Version</h3>
<p>The simplest way to verify NPM exists is to check its version:</p>
<div class="code-block">
<div class="code-header">
<div class="code-dots">
<div class="dot r"></div>
<div class="dot y"></div>
<div class="dot g"></div>
</div>
<span class="code-lang">Terminal / Command Prompt</span>
<button class="code-copy" onclick="copyCode(this, 'npm --version')">Copy</button>
</div>
<div class="code-body">
$ <span class="cmd">npm</span> --version<br><br>
<span class="comment">// Output example:</span><br>
<span style="color: var(--green);">10.2.3</span>
</div>
</div>
<div class="info tip">
<span class="info-icon">💡</span>
<div>
<strong>What This Means:</strong>
<p>If you see a version number (like 10.2.3), NPM is installed! If you see "command not found" or an error, NPM is not installed.</p>
</div>
</div>
<div class="info important">
<span class="info-icon">⚡</span>
<div>
<strong>Short Version:</strong>
<p>You can also use the shorthand: <code style="color: var(--npm); font-family: 'Fira Code', monospace;">npm -v</code></p>
</div>
</div>
</div>
</section>
<!-- All Verification Methods -->
<section class="section" id="methods">
<div class="sec-title">
<div class="sec-icon" style="background: linear-gradient(135deg, var(--purple), var(--pink));">🎯</div>
<span>All Verification Methods</span>
</div>
<div class="card">
<h3>🛠️ Different Ways to Verify</h3>
<p>Click on each method to learn more:</p>
<div class="cmd-grid">
<div class="cmd-card" onclick="showMethod('version')">
<div class="cmd-card-icon">🔢</div>
<div class="cmd-card-title">npm --version</div>
<div class="cmd-card-desc">Shows the installed NPM version</div>
</div>
<div class="cmd-card" onclick="showMethod('which')">
<div class="cmd-card-icon">📍</div>
<div class="cmd-card-title">which npm</div>
<div class="cmd-card-desc">Shows NPM installation path (Mac/Linux)</div>
</div>
<div class="cmd-card" onclick="showMethod('where')">
<div class="cmd-card-icon">📂</div>
<div class="cmd-card-title">where npm</div>
<div class="cmd-card-desc">Shows NPM installation path (Windows)</div>
</div>
<div class="cmd-card" onclick="showMethod('help')">
<div class="cmd-card-icon">❓</div>
<div class="cmd-card-title">npm help</div>
<div class="cmd-card-desc">Shows NPM help (confirms it works)</div>
</div>
<div class="cmd-card" onclick="showMethod('config')">
<div class="cmd-card-icon">⚙️</div>
<div class="cmd-card-title">npm config list</div>
<div class="cmd-card-desc">Shows NPM configuration</div>
</div>
<div class="cmd-card" onclick="showMethod('doctor')">
<div class="cmd-card-icon">🩺</div>
<div class="cmd-card-title">npm doctor</div>
<div class="cmd-card-desc">Checks NPM environment health</div>
</div>
</div>
</div>
</section>
<!-- Step by Step -->
<section class="section" id="steps">
<div class="sec-title">
<div class="sec-icon" style="background: linear-gradient(135deg, var(--orange), var(--yellow));">📋</div>
<span>Step-by-Step Guide</span>
</div>
<div class="card">
<h3>🚶 Follow These Steps</h3>
<div class="steps">
<div class="step" onclick="showToast('Step 1: Open your terminal!')">
<div class="step-num">1</div>
<div class="step-content">
<h4>Open Terminal/Command Prompt</h4>
<p>Windows: Press <kbd style="background: var(--card); padding: 2px 8px; border-radius: 4px;">Win + R</kbd>, type "cmd", press Enter<br>
Mac: Press <kbd style="background: var(--card); padding: 2px 8px; border-radius: 4px;">Cmd + Space</kbd>, type "Terminal"<br>
Linux: Press <kbd style="background: var(--card); padding: 2px 8px; border-radius: 4px;">Ctrl + Alt + T</kbd></p>
</div>
</div>
<div class="step" onclick="showToast('Step 2: Type the command!')">
<div class="step-num">2</div>
<div class="step-content">
<h4>Type the Verification Command</h4>
<p>Type: <code style="color: var(--npm); font-family: 'Fira Code', monospace;">npm --version</code> or <code style="color: var(--npm); font-family: 'Fira Code', monospace;">npm -v</code></p>
</div>
</div>
<div class="step" onclick="showToast('Step 3: Press Enter!')">
<div class="step-num">3</div>
<div class="step-content">
<h4>Press Enter</h4>
<p>Execute the command and wait for the result</p>
</div>
</div>
<div class="step" onclick="showToast('Step 4: Check the output!')">
<div class="step-num">4</div>
<div class="step-content">
<h4>Check the Output</h4>
<p>✅ Version number = NPM is installed<br>
❌ Error message = NPM is not installed</p>
</div>
</div>
</div>
</div>
</section>
<!-- Interactive Terminal -->
<section class="section" id="interactive">
<div class="sec-title">
<div class="sec-icon" style="background: linear-gradient(135deg, var(--green), var(--cyan));">🎮</div>
<span>Interactive Terminal</span>
</div>
<div class="terminal-container">
<div class="terminal-title">🎯 Try NPM Commands!</div>
<p style="text-align: center; color: #94a3b8; margin-bottom: 20px;">Click buttons to simulate NPM verification commands</p>
<div class="terminal">
<div class="term-header">
<div class="dot r"></div>
<div class="dot y"></div>
<div class="dot g"></div>
<span class="term-title">Terminal Simulator</span>
</div>
<div class="term-body" id="termOutput">
<div class="term-line">
<span style="color: #64748b;">Welcome! Click a button below to test NPM commands</span>
</div>
<div class="term-line"><span class="prompt">$</span> <span class="cursor"></span></div>
</div>
</div>
<div class="btn-group">
<button class="btn" onclick="runCommand('version')">
🔢 npm --version
</button>
<button class="btn secondary" onclick="runCommand('help')">
❓ npm help
</button>
<button class="btn success" onclick="runCommand('doctor')">
🩺 npm doctor
</button>
<button class="btn" style="background: linear-gradient(135deg, var(--purple), var(--pink));" onclick="clearTerm()">
🔄 Clear
</button>
</div>
<div class="result-box" id="resultBox">
<div class="result-icon">✅</div>
<div class="result-text">NPM is installed and working!</div>
</div>
</div>
</section>
<!-- Troubleshooting -->
<section class="section" id="troubleshoot">
<div class="sec-title">
<div class="sec-icon" style="background: linear-gradient(135deg, var(--yellow), var(--orange));">🔧</div>
<span>Troubleshooting</span>
</div>
<div class="card">
<h3>❗ NPM Not Found?</h3>
<div class="info warn">
<span class="info-icon">⚠️</span>
<div>
<strong>Command Not Found:</strong>
<p>If you see "npm: command not found" or similar, NPM is not installed or not in your PATH.</p>
</div>
</div>
<div class="code-block">
<div class="code-header">
<div class="code-dots">
<div class="dot r"></div>
<div class="dot y"></div>
<div class="dot g"></div>
</div>
<span class="code-lang">Solution: Install Node.js</span>
</div>
<div class="code-body">
<span class="comment">// NPM comes bundled with Node.js</span><br>
<span class="comment">// Download from: nodejs.org</span><br><br>
<span style="color: var(--cyan);">1.</span> Visit <span style="color: var(--yellow);">https://nodejs.org</span><br>
<span style="color: var(--cyan);">2.</span> Download the installer<br>
<span style="color: var(--cyan);">3.</span> Run the installer<br>
<span style="color: var(--cyan);">4.</span> Restart your terminal<br>
<span style="color: var(--cyan);">5.</span> Try <span class="cmd">npm --version</span> again
</div>
</div>
<div class="info tip">
<span class="info-icon">💡</span>
<div>
<strong>Restart Terminal:</strong>
<p>After installing Node.js, always restart your terminal or command prompt before testing!</p>
</div>
</div>
</div>
</section>
<!-- Understanding Output -->
<section class="section" id="output">
<div class="sec-title">
<div class="sec-icon" style="background: linear-gradient(135deg, var(--pink), var(--purple));">📊</div>
<span>Understanding the Output</span>
</div>
<div class="card">
<h3>🔍 What Does the Version Number Mean?</h3>
<div class="code-block">
<div class="code-header">
<div class="code-dots">
<div class="dot r"></div>
<div class="dot y"></div>
<div class="dot g"></div>
</div>
<span class="code-lang">Version Format</span>
</div>
<div class="code-body">
<span style="color: var(--green);">10.2.3</span><br>
<span style="color: var(--cyan);">│ │ │</span><br>
<span style="color: var(--cyan);">│ │ └─</span> <span class="comment">Patch version (bug fixes)</span><br>
<span style="color: var(--cyan);">│ └───</span> <span class="comment">Minor version (new features)</span><br>
<span style="color: var(--cyan);">└──────</span> <span class="comment">Major version (breaking changes)</span>
</div>
</div>
<div class="info cool">
<span class="info-icon">📌</span>
<div>
<strong>Semantic Versioning:</strong>
<p>NPM uses semantic versioning (semver): MAJOR.MINOR.PATCH</p>
</div>
</div>
</div>
</section>
<!-- Quick Reference -->
<section class="section" id="reference">
<div class="sec-title">
<div class="sec-icon" style="background: linear-gradient(135deg, var(--cyan), var(--blue));">📚</div>
<span>Quick Reference</span>
</div>
<div class="card">
<h3>⚡ Common NPM Verification Commands</h3>
<div class="code-block">
<div class="code-header">
<div class="code-dots">
<div class="dot r"></div>
<div class="dot y"></div>
<div class="dot g"></div>
</div>
<span class="code-lang">Cheat Sheet</span>
<button class="code-copy" onclick="copyCode(this, 'npm --version\nnpm -v\nwhich npm\nwhere npm\nnpm help\nnpm config list\nnpm doctor')">Copy All</button>
</div>
<div class="code-body">
<span class="comment"># Check NPM version</span><br>
<span class="cmd">npm</span> --version<br>
<span class="cmd">npm</span> -v<br><br>
<span class="comment"># Find NPM location (Mac/Linux)</span><br>
<span class="func">which</span> npm<br><br>
<span class="comment"># Find NPM location (Windows)</span><br>
<span class="func">where</span> npm<br><br>
<span class="comment"># Get NPM help</span><br>
<span class="cmd">npm</span> help<br><br>
<span class="comment"># View NPM config</span><br>
<span class="cmd">npm</span> config list<br><br>
<span class="comment"># Check NPM health</span><br>
<span class="cmd">npm</span> doctor
</div>
</div>
</div>
</section>
<!-- Quiz -->
<section class="section" id="quiz">
<div class="sec-title">
<div class="sec-icon" style="background: linear-gradient(135deg, var(--purple), var(--pink));">🧠</div>
<span>Test Your Knowledge!</span>
</div>
<div class="quiz">
<div class="quiz-q">Which command checks if NPM is installed?</div>
<div class="quiz-opts">
<div class="quiz-opt" onclick="checkQuiz(this, false)">
<span class="opt-letter">A</span>
<span>npm install</span>
</div>
<div class="quiz-opt" onclick="checkQuiz(this, true)">
<span class="opt-letter">B</span>
<span>npm --version</span>
</div>
<div class="quiz-opt" onclick="checkQuiz(this, false)">
<span class="opt-letter">C</span>
<span>npm start</span>
</div>
<div class="quiz-opt" onclick="checkQuiz(this, false)">
<span class="opt-letter">D</span>
<span>npm check</span>
</div>
</div>
<div class="quiz-result" id="quizResult"></div>
</div>
</section>
</main>
<button class="fab" id="fab" onclick="scrollTop()">⬆️</button>
<div class="toast" id="toast"></div>
<footer>
<div class="footer-icons">
<div class="footer-icon">📦</div>
<div class="footer-icon">⬢</div>
<div class="footer-icon">💻</div>
<div class="footer-icon">✨</div>
</div>
<p style="color: #64748b;">Master NPM Verification! 🎉</p>
<p style="color: #475569; font-size: 0.85rem; margin-top: 8px;">Always verify before starting your projects!</p>
</footer>
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