Mega Menu

Full-width multi-column dropdown navigation menu with categories, links, icons, and a featured section.

vanilla-js css

Targets: JS HTML

Code

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

:root {
  --bg: #050910;
  --card: #0d1117;
  --text: #f2f6ff;
  --muted: #475569;
  --border: rgba(255, 255, 255, 0.08);
  --accent: #38bdf8;
  --nav-h: 60px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(5, 9, 16, 0.8);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.navbar__inner {
  max-width: 1100px;
  margin: 0 auto;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0 1.5rem;
}

/* Logo */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.logo-gem {
  color: var(--accent);
}

/* Nav */
.navbar__nav {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.4rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  border-radius: 6px;
  transition: color 0.18s, background 0.18s;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.nav-item-wrap {
  position: static;
}

.nav-trigger {
  padding: 0.4rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  background: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: color 0.18s, background 0.18s;
  white-space: nowrap;
}

.nav-trigger:hover,
.nav-trigger[aria-expanded="true"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.trigger-chevron {
  flex-shrink: 0;
  transition: transform 0.22s var(--ease);
}

.nav-trigger[aria-expanded="true"] .trigger-chevron {
  transform: rotate(180deg);
}

.navbar__cta {
  margin-left: auto;
  flex-shrink: 0;
  padding: 0.4rem 1.1rem;
  background: var(--accent);
  color: #050910;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 999px;
  transition: opacity 0.18s;
}

.navbar__cta:hover {
  opacity: 0.85;
}

/* ── Mega Panel ── */
.mega-panel {
  position: absolute;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  padding: 2rem 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.22s var(--ease), transform 0.22s var(--ease);
  z-index: 100;
}

.mega-panel.open {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.mega-panel__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.mega-panel__inner--2col {
  grid-template-columns: repeat(2, 1fr);
  max-width: 640px;
}

/* ── Column ── */
.mega-col {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mega-col__title {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.625rem;
}

/* ── Mega link with icon ── */
.mega-link {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text);
  transition: background 0.18s;
  font-size: 0.875rem;
}

.mega-link:hover {
  background: rgba(255, 255, 255, 0.05);
}

.mega-link strong {
  display: block;
  font-weight: 600;
  margin-bottom: 0.125rem;
}

.mega-link__icon {
  font-size: 1.1rem;
  width: 30px;
  height: 30px;
  background: rgba(56, 189, 248, 0.08);
  border-radius: 7px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.mega-link__desc {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
  font-weight: 400;
}

/* Plain links (no icon) */
.mega-link--plain {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--muted);
  gap: 0;
}

.mega-link--plain:hover {
  color: var(--text);
}

/* ── Featured column ── */
.mega-col--featured {
}

.mega-featured-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.08) 0%, rgba(56, 189, 248, 0.03) 100%);
  border: 1px solid rgba(56, 189, 248, 0.15);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s, background 0.2s;
  position: relative;
}

.mega-featured-card:hover {
  border-color: rgba(56, 189, 248, 0.35);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.12) 0%, rgba(56, 189, 248, 0.06) 100%);
}

.featured-card__badge {
  position: absolute;
  top: 0.875rem;
  right: 0.875rem;
  background: var(--accent);
  color: #050910;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.featured-card__icon {
  font-size: 1.75rem;
  margin-bottom: 0.25rem;
}
.featured-card__title {
  font-size: 0.9375rem;
  font-weight: 700;
}

.featured-card__desc {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.55;
}

.featured-card__cta {
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
}

/* ── Overlay ── */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
}

.menu-overlay.active {
  display: block;
}

/* ── Page body ── */
.page-body {
  padding-top: calc(var(--nav-h) + 5rem);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.page-hero {
  text-align: center;
  max-width: 480px;
  padding: 2rem;
}

.page-hero__title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.page-hero__desc {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.7;
}

.page-hero__desc strong {
  color: var(--text);
}

(function () {
  var triggers = document.querySelectorAll(".nav-trigger");
  var overlay = document.getElementById("menu-overlay");
  var activePanel = null;
  var activeTrigger = null;

  function openMenu(trigger) {
    var panelId = trigger.getAttribute("aria-controls");
    var panel = document.getElementById(panelId);
    if (!panel) return;

    // Close any currently open menu first
    if (activePanel && activePanel !== panel) {
      closeMenu();
    }

    trigger.setAttribute("aria-expanded", "true");
    panel.classList.add("open");
    if (overlay) overlay.classList.add("active");
    activePanel = panel;
    activeTrigger = trigger;
  }

  function closeMenu() {
    if (activeTrigger) activeTrigger.setAttribute("aria-expanded", "false");
    if (activePanel) activePanel.classList.remove("open");
    if (overlay) overlay.classList.remove("active");
    activePanel = null;
    activeTrigger = null;
  }

  // Toggle on trigger click
  triggers.forEach(function (trigger) {
    trigger.addEventListener("click", function () {
      var panelId = trigger.getAttribute("aria-controls");
      var panel = document.getElementById(panelId);
      if (panel && panel.classList.contains("open")) {
        closeMenu();
      } else {
        openMenu(trigger);
      }
    });

    // Keyboard: Enter/Space handled natively for buttons
    trigger.addEventListener("keydown", function (e) {
      if (e.key === "Escape") {
        closeMenu();
        trigger.focus();
      }
    });
  });

  // Close on overlay click
  if (overlay) {
    overlay.addEventListener("click", closeMenu);
  }

  // Close on Escape from anywhere
  document.addEventListener("keydown", function (e) {
    if (e.key === "Escape" && activePanel) {
      var prev = activeTrigger;
      closeMenu();
      if (prev) prev.focus();
    }
  });

  // Close when focus leaves the open panel and its trigger
  document.addEventListener("focusin", function (e) {
    if (!activePanel) return;
    var inNavbar = document.querySelector(".navbar").contains(e.target);
    if (!inNavbar) closeMenu();
  });
})();

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Mega Menu</title>
  <link rel="stylesheet" href="style.css" />
</head>
<body>

  <!-- ── Navbar ── -->
  <header class="navbar" id="navbar">
    <div class="navbar__inner">

      <a href="#" class="navbar__logo" aria-label="Home">
        <span class="logo-gem" aria-hidden="true">✦</span> Stealthis
      </a>

      <nav class="navbar__nav" aria-label="Main navigation">

        <a href="#" class="nav-link">Home</a>

        <!-- Products trigger -->
        <div class="nav-item-wrap">
          <button
            class="nav-trigger"
            aria-haspopup="true"
            aria-expanded="false"
            aria-controls="menu-products"
            id="trigger-products"
          >
            Products
            <svg class="trigger-chevron" aria-hidden="true" width="12" height="12" viewBox="0 0 12 12" fill="none">
              <path d="M2 4l4 4 4-4" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
            </svg>
          </button>
        </div>

        <!-- Resources trigger -->
        <div class="nav-item-wrap">
          <button
            class="nav-trigger"
            aria-haspopup="true"
            aria-expanded="false"
            aria-controls="menu-resources"
            id="trigger-resources"
          >
            Resources
            <svg class="trigger-chevron" aria-hidden="true" width="12" height="12" viewBox="0 0 12 12" fill="none">
              <path d="M2 4l4 4 4-4" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
            </svg>
          </button>
        </div>

        <a href="#" class="nav-link">Pricing</a>

      </nav>

      <a href="#" class="navbar__cta">Get started</a>
    </div>

    <!-- ── Products mega-menu ── -->
    <div class="mega-panel" id="menu-products" role="region" aria-label="Products menu">
      <div class="mega-panel__inner">

        <!-- Column 1: UI Components -->
        <div class="mega-col">
          <p class="mega-col__title">UI Components</p>
          <a href="#" class="mega-link">
            <span class="mega-link__icon" aria-hidden="true">🧩</span>
            <span>
              <strong>Components</strong>
              <span class="mega-link__desc">50+ copy-paste HTML components</span>
            </span>
          </a>
          <a href="#" class="mega-link">
            <span class="mega-link__icon" aria-hidden="true">🎨</span>
            <span>
              <strong>Animations</strong>
              <span class="mega-link__desc">GSAP, CSS, and Three.js motion</span>
            </span>
          </a>
          <a href="#" class="mega-link">
            <span class="mega-link__icon" aria-hidden="true">🃏</span>
            <span>
              <strong>Cards &amp; Layouts</strong>
              <span class="mega-link__desc">Grid systems, card patterns, heroes</span>
            </span>
          </a>
        </div>

        <!-- Column 2: Developer Tools -->
        <div class="mega-col">
          <p class="mega-col__title">Developer Tools</p>
          <a href="#" class="mega-link">
            <span class="mega-link__icon" aria-hidden="true">🔧</span>
            <span>
              <strong>MCP Server</strong>
              <span class="mega-link__desc">Access resources via Claude MCP</span>
            </span>
          </a>
          <a href="#" class="mega-link">
            <span class="mega-link__icon" aria-hidden="true">📦</span>
            <span>
              <strong>Boilerplates</strong>
              <span class="mega-link__desc">Astro, Next.js, Vite starters</span>
            </span>
          </a>
          <a href="#" class="mega-link">
            <span class="mega-link__icon" aria-hidden="true">⚡</span>
            <span>
              <strong>Snippets</strong>
              <span class="mega-link__desc">Utility patterns for everyday use</span>
            </span>
          </a>
        </div>

        <!-- Column 3: Featured -->
        <div class="mega-col mega-col--featured">
          <p class="mega-col__title">Featured</p>
          <a href="#" class="mega-featured-card">
            <div class="featured-card__badge">New</div>
            <div class="featured-card__icon" aria-hidden="true">🚀</div>
            <strong class="featured-card__title">Lab Demos</strong>
            <p class="featured-card__desc">Full-screen interactive demos — copy the complete code in one click.</p>
            <span class="featured-card__cta">Explore the lab →</span>
          </a>
        </div>

      </div>
    </div>

    <!-- ── Resources mega-menu ── -->
    <div class="mega-panel" id="menu-resources" role="region" aria-label="Resources menu">
      <div class="mega-panel__inner mega-panel__inner--2col">

        <div class="mega-col">
          <p class="mega-col__title">Learn</p>
          <a href="#" class="mega-link mega-link--plain">Documentation</a>
          <a href="#" class="mega-link mega-link--plain">Getting Started Guide</a>
          <a href="#" class="mega-link mega-link--plain">Changelog</a>
          <a href="#" class="mega-link mega-link--plain">Video Tutorials</a>
        </div>

        <div class="mega-col">
          <p class="mega-col__title">Community</p>
          <a href="#" class="mega-link mega-link--plain">GitHub</a>
          <a href="#" class="mega-link mega-link--plain">Discord</a>
          <a href="#" class="mega-link mega-link--plain">Showcase</a>
          <a href="#" class="mega-link mega-link--plain">Blog</a>
        </div>

      </div>
    </div>

  </header>

  <!-- Overlay (click-away to close) -->
  <div class="menu-overlay" id="menu-overlay" aria-hidden="true"></div>

  <!-- Page content -->
  <main class="page-body">
    <div class="page-hero">
      <h1 class="page-hero__title">Mega Menu</h1>
      <p class="page-hero__desc">Click <strong>Products</strong> or <strong>Resources</strong> in the navbar above to open the multi-column dropdown.</p>
    </div>
  </main>

  <script src="script.js"></script>
</body>
</html>

A full-width multi-column dropdown for top-level navigation with grouped links, section icons, and a highlighted featured card. No dependencies.

Features

Fixed top navbar with three top-level items
“Products” opens a 3-column mega menu with icon links and a featured card
“Resources” opens a 2-column menu with grouped link lists
Smooth fade + slide-down animation on open
Closes on outside click, Escape, or when another trigger is activated
Full keyboard navigation: Tab through items, Enter/Space to open, Escape to close

How it works

Each trigger button sets aria-expanded and toggles an .open class on its associated panel
Panels are position: fixed below the navbar, spanning the full width, hidden via opacity: 0 + pointer-events: none until .open
An overlay <div> catches outside clicks to close the active menu
Escape key closes any open menu and returns focus to its trigger

Accessibility

Nav landmark with aria-label
Trigger buttons use aria-haspopup="true" and aria-expanded
Mega panel has role="region" and aria-label
All links are keyboard-reachable in DOM order