Live preview

Source code

html

<div class="container py-5">
  <div class="d-flex justify-content-between align-items-center mb-4">
    <div><span class="badge bg-danger">FLASH DEALS</span>
      <h3 class="fw-bold mt-2 mb-0">Ends in 3 hours</h3>
    </div><a href="#" class="text-danger fw-bold text-decoration-none">View all →</a>
  </div>
  <div class="row g-3">
    <div class="col-6 col-md-3">
      <div class="border rounded-4 p-3 h-100 position-relative"><span class="badge bg-danger position-absolute top-0 start-0 m-2">-45%</span><img src="https://images.unsplash.com/photo-1523275335684-37898b6baf30?w=400&h=300&fit=crop" alt="Watch" class="img-fluid rounded">
        <h6 class="mt-2 mb-1 fw-bold small">Classic Watch</h6><span class="text-danger fw-bold">$65</span> <s class="small text-muted">$120</s>
        <div class="progress mt-2" style="height:6px">
          <div class="progress-bar bg-danger" style="width:70%"></div>
        </div><small class="text-muted">Sold 70/100</small>
      </div>
    </div>
    <div class="col-6 col-md-3">
      <div class="border rounded-4 p-3 h-100 position-relative"><span class="badge bg-danger position-absolute top-0 start-0 m-2">-30%</span><img src="https://images.unsplash.com/photo-1542291026-7eec264c27ff?w=400&h=300&fit=crop" alt="Sneakers" class="img-fluid rounded">
        <h6 class="mt-2 mb-1 fw-bold small">Runner Shoes</h6><span class="text-danger fw-bold">$62</span> <s class="small text-muted">$89</s>
        <div class="progress mt-2" style="height:6px">
          <div class="progress-bar bg-danger" style="width:40%"></div>
        </div><small class="text-muted">Sold 40/100</small>
      </div>
    </div>
    <div class="col-6 col-md-3">
      <div class="border rounded-4 p-3 h-100 position-relative"><span class="badge bg-danger position-absolute top-0 start-0 m-2">-55%</span><img src="https://images.unsplash.com/photo-1505740420928-5e560c06d30e?w=400&h=300&fit=crop" alt="Headphones" class="img-fluid rounded">
        <h6 class="mt-2 mb-1 fw-bold small">Headphones</h6><span class="text-danger fw-bold">$89</span> <s class="small text-muted">$199</s>
        <div class="progress mt-2" style="height:6px">
          <div class="progress-bar bg-danger" style="width:85%"></div>
        </div><small class="text-muted">Sold 85/100</small>
      </div>
    </div>
    <div class="col-6 col-md-3">
      <div class="border rounded-4 p-3 h-100 position-relative"><span class="badge bg-danger position-absolute top-0 start-0 m-2">-25%</span><img src="https://images.unsplash.com/photo-1546868871-7041f2a55e12?w=400&h=300&fit=crop" alt="Smart watch" class="img-fluid rounded">
        <h6 class="mt-2 mb-1 fw-bold small">Smart Watch</h6><span class="text-danger fw-bold">$186</span> <s class="small text-muted">$249</s>
        <div class="progress mt-2" style="height:6px">
          <div class="progress-bar bg-danger" style="width:20%"></div>
        </div><small class="text-muted">Sold 20/100</small>
      </div>
    </div>
  </div>
</div>

How to use this flash sale

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 Flash Deals Grid 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 flash sale 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 Flash Deals Grid flash sale

This flash sale 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: Flash Deals Grid

Browser compatibility & standards

The Flash Deals Grid flash sale 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 flash sale 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 flash sale 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 flash sale 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 flash sale 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 flash sale 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 — Flash Deals Grid (card grid)

When and why to use this card grid

Cards are the workhorse layout unit of modern web design: product tiles, blog teasers, feature lists and pricing tables are all card grids underneath. Bootstrap's .card plus the responsive .row-cols-* utilities give you an equal-height, equal-gutter grid with zero custom CSS, which is exactly what you want when the number of items is dynamic.

Accessibility & ARIA attributes

A card is a container, not a widget, so it needs no ARIA role by default. What it does need is a correct heading level inside (usually <h3> when the section above uses <h2>) and a single unambiguous link. If the whole card should be clickable, use the stretched-link pattern (.stretched-link on the title anchor) rather than wrapping the card in an <a>: it keeps nested buttons focusable and avoids nesting interactive elements, which is invalid HTML and confuses screen readers.

Performance notes for this pattern

Card grids frequently ship dozens of images at once. Add loading="lazy" and decoding="async" to every image below the fold, and pin the aspect ratio with the .ratio utility so late-arriving images don't shift the grid. If your grid can grow past about 50 items, paginate or virtualise it — a 200-card DOM subtree measurably slows scrolling on low-end Android devices.

Three customisation tricks

Use .row-cols-1 .row-cols-md-2 .row-cols-lg-3 .g-4 for a grid that reflows cleanly at every breakpoint.
Add .h-100 on the inner .card so every card in a row matches the tallest sibling.
Swap .card-img-top for a .ratio.ratio-16x9 wrapper to guarantee identical image heights regardless of source dimensions.

Mistakes to avoid

Forgetting .h-100, which leaves ragged card bottoms whenever copy lengths differ.
Nesting an <a> inside an <a> to make the whole card clickable.

More designs in this section

Flash Sale

Flash Sale with Countdown