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Source code

html

<div class="container py-4">
  <!-- 2. Full Container Wide Navigation Menu with Hover Effect -->
  <nav class="navbar navbar-expand-lg navbar-dark bg-dark rounded-4 mb-5 p-3 shadow hover-nav">
    <div class="container-fluid">
      <a class="navbar-brand fw-bold" href="#">SHOP<span class="text-primary">EASE</span></a>
      <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navMenu">
        <span class="navbar-toggler-icon"></span>
      </button>
      <div class="collapse navbar-collapse" id="navMenu">
        <ul class="navbar-nav w-100 justify-content-between text-center">
          <li class="nav-item"><a class="nav-link px-3" href="#">Home</a></li>
          <li class="nav-item"><a class="nav-link px-3" href="#">Shop</a></li>
          <li class="nav-item"><a class="nav-link px-3" href="#">Categories</a></li>
          <li class="nav-item"><a class="nav-link px-3" href="#">Cart</a></li>
          <li class="nav-item"><a class="nav-link px-3" href="#">Checkout</a></li>
          <li class="nav-item"><a class="nav-link px-3" href="#">Dashboard</a></li>
          <li class="nav-item"><a class="nav-link px-3" href="#">Contact</a></li>
        </ul>
      </div>
    </div>
  </nav>

</div>

<style>
  /* Full container wide navigation hover effect */
  .hover-nav .nav-link {
    transition: all 0.3s ease;
    position: relative;
  }

  .hover-nav .nav-link:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: #0d6efd;
    transition: width 0.3s ease;
  }

  .hover-nav .nav-link:hover:after {
    width: 100%;
  }

  .hover-nav .nav-link:hover {
    color: #0d6efd !important;
    transform: translateY(-2px);
  }

  /* Form Customization */
  .nav-pills .nav-link.active {
    background-color: #fff !important;
    color: #0d6efd !important;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  }

  .nav-pills .nav-link {
    color: #6c757d;
  }

  @media (max-width: 991px) {
    .navbar-nav {
      padding-top: 20px;
    }

    .hover-nav .nav-link:after {
      display: none;
    }
  }

</style>

<script>
  // Handle form submission and show confirmation modal
  document.getElementById('loginForm').addEventListener('submit', function(event) {
    event.preventDefault();
    const confirmationModal = new bootstrap.Modal(document.getElementById('submitModal'));
    confirmationModal.show();
  });

</script>

How to use this component

Add it to your project in three steps

Copy the HTML from the Source code tab above and paste it inside your <div class="container"> wrapper.
Make sure the Bootstrap 5 CDN CSS and JS are linked in your <head> and before </body>. Any CodeShikhi component assumes Bootstrap 5.3+ is already loaded.
Swap the placeholder text, links, and images for your own content — the layout, spacing, and responsive behaviour stay intact.

The Black shop Header block is fully responsive and works on every screen from 320 px phones to 1440 px+ desktops without additional CSS.

Accessibility checklist

Ship it accessible by default

Use semantic HTML landmarks — <header>, <nav>, <main>, <footer> — so screen readers can navigate your page.
Give every image an alt attribute (empty alt="" if it's decorative).
Label icon-only buttons with aria-label and keep focus outlines visible.
Maintain a contrast ratio of at least 4.5:1 for body text against its background.
Test the component with Tab / Shift+Tab and Enter — every interactive element should be reachable.

Step-by-step customisation

Make it match your brand

Change the colour palette by overriding Bootstrap CSS variables: --bs-primary, --bs-body-bg.
Adjust spacing with utility classes such as py-5, gap-4, and mt-lg-5 — no custom CSS required.
Swap the typography by loading a Google Font in your <head> and setting --bs-body-font-family.
Replace stock images with brand assets. Keep dimensions similar to avoid layout shift.
Preview at multiple breakpoints (mobile, tablet, desktop) and tweak column spans if content wraps awkwardly.

Need the full theory? Read our Bootstrap 5 Technical Introduction Guide for grid, breakpoints, and Sass customisation in depth.

About the Black shop Header component

This component is part of the free CodeShikhi (কোড শিখি) Bootstrap 5 library — a growing collection of copy-paste website building blocks curated for learners and freelance developers. Every block is written in clean, semantic HTML with Bootstrap utility classes, keeps custom CSS to the minimum needed, and works without any build step. Use it as a starting point and adapt the markup, colours, and content to fit your project's brand and audience.

If you spot a bug, want a new variation, or would like to contribute an improvement, reach us via the contact page — we ship updates weekly based on community feedback.

Detailed Technical Breakdown

Detailed Technical Breakdown: Black shop Header

Browser compatibility & standards

The Black shop Header component is authored against Bootstrap 5.3, which drops legacy Internet Explorer support and targets modern evergreen engines — Chrome, Edge, Firefox, Safari, and all Chromium-based mobile browsers. Because the markup relies exclusively on the standard CSS features that ship with Bootstrap (Flexbox, CSS Grid, CSS custom properties, and the responsive breakpoint system), you can safely deploy this component to any browser released in the last five years without polyfills. If you need to support very old WebKit or Samsung Internet builds, load the standard Bootstrap 5 CSS from the official jsDelivr CDN — the bundled autoprefixer output already covers those vendor prefixes.

Performance impact

Performance-wise this block is intentionally light. The HTML payload for a typical Bootstrap component is under 4 KB gzipped, and it shares the same Bootstrap CSS/JS bundle you are already loading — meaning the marginal cost of adding it to a page is effectively zero KB on repeat visits. There is no JavaScript framework runtime, no hydration cost, and no client-side data fetching. The only images referenced are placeholders you will replace with your own assets; when you do, serve them as WebP or AVIF, add explicit width and height attributes to prevent layout shift (CLS), and lazy-load anything below the fold with loading="lazy". These small changes typically move Lighthouse Performance scores from the mid-80s into the 95+ range on both mobile and desktop.

Utility classes used

The component leans on Bootstrap's utility-first classes to stay declarative: spacing utilities (p-*, m-*, gap-*), the flex helpers (d-flex, align-items-*, justify-content-*), the grid system (container, row, col-lg-*), typography helpers (display-*, lead, text-*), and colour utilities that resolve to Bootstrap CSS variables such as --bs-primary, --bs-body-bg, and --bs-border-color. Because everything is expressed as utilities you can re-theme the entire component by overriding a handful of CSS variables at the :root level — no Sass recompile required.

Exact customisation steps

Copy the source HTML from the tab above and paste it inside your <body>. The outer <div class="container"> wrapper is already included so the component sits on the Bootstrap grid.
Replace the placeholder headings and paragraphs with your own copy. Keep heading levels in order (h1 → h2 → h3) so screen readers and search engines can parse the document outline.
Swap any <img> tags for your brand assets. Match the original aspect ratio to avoid layout shift, and always fill in a meaningful alt attribute.
Retune the palette by overriding CSS variables::root { --bs-primary: #4f46e5; --bs-body-bg: #ffffff; }. All utility colour classes update automatically.
Test at each Bootstrap breakpoint — sm (576 px), md (768 px),lg (992 px), xl (1200 px), xxl (1400 px) — using your browser's device toolbar, and tweak column spans if long content wraps.
Ship it with the standard Bootstrap 5 CDN in the <head> and the JS bundle before the closing </body>. No build step required.

Technical & Performance Integration Guide

Technical & Performance Integration Guide — Black shop Header (navigation bar)

When and why to use this navigation bar

A navigation bar is the single most-used element on any website: it is rendered on every route, it is the first landmark assistive technology announces, and it is what search crawlers follow to discover the rest of your pages. Bootstrap's navbar handles the hardest part for you — collapsing a horizontal menu into a hamburger toggle below the chosen breakpoint — while leaving the markup semantic enough to extend safely.

Accessibility & ARIA attributes

Wrap the whole block in a real <nav> element and give it aria-label="Main" so screen-reader users can distinguish it from breadcrumb or footer navigation. The hamburger button must keep its data-bs-toggle="collapse", aria-controls pointing at the collapsible container id, aria-expanded (Bootstrap flips it automatically) and aria-label="Toggle navigation". Mark the current page link with aria-current="page" — this is what tells a screen reader where the visitor already is. Dropdown triggers need role handling from Bootstrap's JS bundle, so never strip bootstrap.bundle.min.js if you use them.

Performance notes for this pattern

Navbars are part of the largest-contentful-paint region, so avoid loading a webfont icon set purely for a hamburger glyph — an inline SVG costs about 300 bytes versus roughly 80 KB for a full icon font. If you use a logo image, set explicit width and height attributes and never lazy-load it: the navbar is above the fold and lazy-loading it delays LCP. A sticky navbar (position: sticky; top: 0) is far cheaper than a JavaScript scroll listener because compositing happens on the GPU.

Three customisation tricks

Add the .shadow-sm and .bg-body-tertiary utilities for a subtle elevation that still respects dark mode via Bootstrap CSS variables.
Use .navbar-expand-lg instead of .navbar-expand-md when your menu has more than five items — it prevents cramped tablet layouts.
Override --bs-navbar-padding-y at :root to tighten the bar on mobile without writing a media query.

Mistakes to avoid

Duplicating the navbar inside a page that already renders a global header — one per document, always.
Removing the .container wrapper, which makes links stick to the viewport edge on wide screens.

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