Pages Hard

Product Detail Page

A full e-commerce product page with image gallery, variant picker, quantity selector, add-to-cart, and a reviews section. No libraries.

Open in Lab

vanilla-js css

Targets: JS HTML

Code

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #fff;
  color: #111;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 10;
}

.logo {
  font-size: 20px;
  font-weight: 800;
  text-decoration: none;
  color: #111;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}
.header-nav a {
  font-size: 14px;
  color: #555;
  text-decoration: none;
}

.cart-btn {
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.cart-btn svg {
  width: 22px;
  height: 22px;
  color: #111;
}

.cart-count {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 16px;
  height: 16px;
  background: #6366f1;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 40px;
  font-size: 13px;
  color: #888;
  border-bottom: 1px solid #f3f4f6;
}

.breadcrumb a {
  color: #6366f1;
  text-decoration: none;
}

/* Product layout */
.product-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px;
}

@media (max-width: 768px) {
  .product-layout {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 24px;
  }
  .site-header {
    padding: 16px 24px;
  }
  .breadcrumb {
    padding: 12px 24px;
  }
}

/* Gallery */
.gallery-main {
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  background: #f3f4f6;
  aspect-ratio: 1;
}

.gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.25s;
}

.gallery-thumbs {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.thumb {
  width: 72px;
  height: 72px;
  border-radius: 10px;
  overflow: hidden;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  background: #f3f4f6;
  transition: border-color 0.15s;
  flex-shrink: 0;
}

.thumb.active {
  border-color: #6366f1;
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Product info */
.product-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  background: #eef2ff;
  color: #6366f1;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.tag.green {
  background: #f0fdf4;
  color: #16a34a;
}

h1 {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 800;
  margin: 12px 0 8px;
}

.product-rating {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #555;
  margin-bottom: 12px;
}
.stars {
  color: #f59e0b;
  font-size: 16px;
}

.price-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.price {
  font-size: 28px;
  font-weight: 800;
  color: #111;
}
.price-original {
  font-size: 18px;
  color: #aaa;
  text-decoration: line-through;
}
.discount-badge {
  background: #fef2f2;
  color: #ef4444;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
}

.product-desc {
  font-size: 15px;
  color: #555;
  line-height: 1.7;
  margin-bottom: 24px;
}

/* Options */
.option-group {
  margin-bottom: 20px;
}
.option-group label {
  font-size: 14px;
  font-weight: 600;
  color: #111;
  display: block;
  margin-bottom: 10px;
}
.option-group label strong {
  font-weight: 700;
}

.color-swatches {
  display: flex;
  gap: 10px;
}
.swatch {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: transform 0.15s;
  outline: none;
}
.swatch.active {
  border-color: #6366f1;
  transform: scale(1.1);
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px #6366f1;
}

.size-btns {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.size-btn {
  padding: 8px 18px;
  border: 1.5px solid #e5e7eb;
  border-radius: 8px;
  background: #fff;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}
.size-btn.active {
  border-color: #6366f1;
  color: #6366f1;
  background: #eef2ff;
}
.size-btn.sold-out {
  color: #aaa;
  text-decoration: line-through;
  cursor: not-allowed;
}

.quantity-row {
  display: flex;
  align-items: center;
  gap: 16px;
}
.qty-stepper {
  display: flex;
  align-items: center;
  border: 1.5px solid #e5e7eb;
  border-radius: 10px;
  overflow: hidden;
}
.qty-btn {
  width: 38px;
  height: 38px;
  border: none;
  background: #f9fafb;
  font-size: 18px;
  cursor: pointer;
  transition: background 0.15s;
}
.qty-btn:hover {
  background: #f3f4f6;
}
.qty-val {
  width: 44px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
}
.stock-note {
  font-size: 12px;
  color: #16a34a;
  font-weight: 500;
}

/* Actions */
.action-buttons {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.btn-cart {
  flex: 1;
  padding: 14px;
  background: #111;
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s;
}

.btn-cart:active {
  opacity: 0.85;
}
.btn-cart.loading {
  opacity: 0.7;
  cursor: wait;
}
.btn-cart.success {
  background: #16a34a;
}

.btn-wishlist {
  width: 52px;
  height: 52px;
  border: 1.5px solid #e5e7eb;
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s;
}
.btn-wishlist:hover {
  border-color: #f43f5e;
}
.btn-wishlist svg {
  width: 20px;
  height: 20px;
  color: #555;
}
.btn-wishlist.active svg {
  fill: #f43f5e;
  stroke: #f43f5e;
}

.product-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: #888;
}

/* Reviews */
.reviews-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px;
  border-top: 1px solid #f3f4f6;
}

.reviews-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 32px;
}

.reviews-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
}
@media (max-width: 768px) {
  .reviews-layout {
    grid-template-columns: 1fr;
  }
}

.big-rating {
  font-size: 64px;
  font-weight: 900;
  color: #111;
  line-height: 1;
}
.stars.big {
  font-size: 24px;
  margin-top: 4px;
}
.rating-count {
  font-size: 14px;
  color: #888;
  margin: 8px 0 16px;
}

.rating-bars {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.rating-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #888;
}
.bar {
  flex: 1;
  height: 6px;
  background: #f3f4f6;
  border-radius: 3px;
  overflow: hidden;
}
.fill {
  height: 100%;
  background: #f59e0b;
  border-radius: 3px;
}

.review-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.review-card {
  padding: 20px;
  border: 1px solid #f3f4f6;
  border-radius: 12px;
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.reviewer-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.av1 {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
}
.av2 {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
}
.av3 {
  background: linear-gradient(135deg, #10b981, #3b82f6);
}
.review-header div {
  flex: 1;
}
.review-header strong {
  font-size: 14px;
  color: #111;
  display: block;
}
.review-header span {
  font-size: 12px;
  color: #888;
}
.review-card p {
  font-size: 14px;
  color: #555;
  line-height: 1.6;
}

// Gallery
const mainImage = document.getElementById("mainImage");
document.querySelectorAll(".thumb").forEach((thumb) => {
  thumb.addEventListener("click", () => {
    document.querySelectorAll(".thumb").forEach((t) => t.classList.remove("active"));
    thumb.classList.add("active");
    mainImage.style.opacity = "0";
    setTimeout(() => {
      mainImage.src = thumb.dataset.src;
      mainImage.style.opacity = "1";
    }, 150);
  });
});

// Color picker
document.querySelectorAll(".swatch").forEach((swatch) => {
  swatch.addEventListener("click", () => {
    document.querySelectorAll(".swatch").forEach((s) => s.classList.remove("active"));
    swatch.classList.add("active");
    document.getElementById("selectedColor").textContent = swatch.dataset.color;
  });
});

// Size picker
document.querySelectorAll(".size-btn:not(.sold-out)").forEach((btn) => {
  btn.addEventListener("click", () => {
    document.querySelectorAll(".size-btn").forEach((b) => b.classList.remove("active"));
    btn.classList.add("active");
  });
});

// Quantity stepper
let qty = 1;
const qtyVal = document.getElementById("qtyVal");
document.getElementById("qtyDec").addEventListener("click", () => {
  if (qty > 1) {
    qty--;
    qtyVal.textContent = qty;
  }
});
document.getElementById("qtyInc").addEventListener("click", () => {
  if (qty < 12) {
    qty++;
    qtyVal.textContent = qty;
  }
});

// Add to cart
const cartBtn = document.getElementById("addToCart");
cartBtn.addEventListener("click", () => {
  if (cartBtn.classList.contains("loading")) return;
  cartBtn.classList.add("loading");
  cartBtn.textContent = "Adding…";
  setTimeout(() => {
    cartBtn.classList.remove("loading");
    cartBtn.classList.add("success");
    cartBtn.textContent = "✓ Added to Cart";
    setTimeout(() => {
      cartBtn.classList.remove("success");
      cartBtn.textContent = "Add to Cart";
    }, 2000);
  }, 900);
});

// Wishlist toggle
document.querySelector(".btn-wishlist").addEventListener("click", function () {
  this.classList.toggle("active");
});

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="style.css" />
    <title>Product Detail</title>
  </head>
  <body>
    <header class="site-header">
      <a href="#" class="logo">Brand</a>
      <nav class="header-nav">
        <a href="#">Products</a>
        <a href="#">About</a>
        <button class="cart-btn" aria-label="Cart">
          <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M6 2L3 6v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2V6l-3-4z"/><line x1="3" y1="6" x2="21" y2="6"/><path d="M16 10a4 4 0 0 1-8 0"/></svg>
          <span class="cart-count">2</span>
        </button>
      </nav>
    </header>

    <div class="breadcrumb">
      <a href="#">Home</a>
      <span>/</span>
      <a href="#">Bags</a>
      <span>/</span>
      <span>Minimal Backpack</span>
    </div>

    <main class="product-layout">
      <!-- Gallery -->
      <div class="gallery">
        <div class="gallery-main">
          <img id="mainImage" src="https://images.unsplash.com/photo-1553062407-98eeb64c6a62?w=600&q=80" alt="Minimal Backpack" />
        </div>
        <div class="gallery-thumbs">
          <button class="thumb active" data-src="https://images.unsplash.com/photo-1553062407-98eeb64c6a62?w=600&q=80">
            <img src="https://images.unsplash.com/photo-1553062407-98eeb64c6a62?w=120&q=70" alt="View 1" />
          </button>
          <button class="thumb" data-src="https://images.unsplash.com/photo-1491637639811-60e2756cc1c7?w=600&q=80">
            <img src="https://images.unsplash.com/photo-1491637639811-60e2756cc1c7?w=120&q=70" alt="View 2" />
          </button>
          <button class="thumb" data-src="https://images.unsplash.com/photo-1548036328-c9fa89d128fa?w=600&q=80">
            <img src="https://images.unsplash.com/photo-1548036328-c9fa89d128fa?w=120&q=70" alt="View 3" />
          </button>
          <button class="thumb" data-src="https://images.unsplash.com/photo-1566150905458-1bf1fc113f0d?w=600&q=80">
            <img src="https://images.unsplash.com/photo-1566150905458-1bf1fc113f0d?w=120&q=70" alt="View 4" />
          </button>
        </div>
      </div>

      <!-- Info -->
      <div class="product-info">
        <div class="product-tags">
          <span class="tag">New</span>
          <span class="tag green">In Stock</span>
        </div>
        <h1>Minimal Backpack</h1>
        <div class="product-rating">
          <div class="stars">★★★★★</div>
          <span>4.8 (124 reviews)</span>
        </div>
        <div class="price-row">
          <span class="price">$129.00</span>
          <span class="price-original">$159.00</span>
          <span class="discount-badge">–19%</span>
        </div>
        <p class="product-desc">A clean, minimal 20L backpack built for everyday carry. Water-resistant canvas, padded laptop sleeve, and ergonomic straps designed to carry you through long days.</p>

        <!-- Color picker -->
        <div class="option-group">
          <label>Color: <strong id="selectedColor">Sand</strong></label>
          <div class="color-swatches">
            <button class="swatch active" data-color="Sand" style="background: #c8b89a;" aria-label="Sand"></button>
            <button class="swatch" data-color="Black" style="background: #1a1a1a;" aria-label="Black"></button>
            <button class="swatch" data-color="Slate" style="background: #64748b;" aria-label="Slate"></button>
            <button class="swatch" data-color="Olive" style="background: #6b7a3a;" aria-label="Olive"></button>
          </div>
        </div>

        <!-- Size picker -->
        <div class="option-group">
          <label>Size</label>
          <div class="size-btns">
            <button class="size-btn">18L</button>
            <button class="size-btn active">20L</button>
            <button class="size-btn">26L</button>
            <button class="size-btn sold-out" disabled>32L</button>
          </div>
        </div>

        <!-- Quantity -->
        <div class="option-group">
          <label>Quantity</label>
          <div class="quantity-row">
            <div class="qty-stepper">
              <button class="qty-btn" id="qtyDec">−</button>
              <span class="qty-val" id="qtyVal">1</span>
              <button class="qty-btn" id="qtyInc">+</button>
            </div>
            <span class="stock-note">12 left in stock</span>
          </div>
        </div>

        <!-- Actions -->
        <div class="action-buttons">
          <button class="btn-cart" id="addToCart">Add to Cart</button>
          <button class="btn-wishlist" aria-label="Add to wishlist">
            <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M20.84 4.61a5.5 5.5 0 0 0-7.78 0L12 5.67l-1.06-1.06a5.5 5.5 0 0 0-7.78 7.78l1.06 1.06L12 21.23l7.78-7.78 1.06-1.06a5.5 5.5 0 0 0 0-7.78z"/></svg>
          </button>
        </div>

        <div class="product-meta">
          <span>SKU: BAG-MIN-20L</span>
          <span>Free shipping over $100</span>
          <span>30-day returns</span>
        </div>
      </div>
    </main>

    <!-- Reviews -->
    <section class="reviews-section">
      <h2>Customer Reviews</h2>
      <div class="reviews-layout">
        <div class="rating-summary">
          <div class="big-rating">4.8</div>
          <div class="stars big">★★★★★</div>
          <div class="rating-count">124 reviews</div>
          <div class="rating-bars">
            <div class="rating-bar"><span>5★</span><div class="bar"><div class="fill" style="width:78%"></div></div><span>78%</span></div>
            <div class="rating-bar"><span>4★</span><div class="bar"><div class="fill" style="width:14%"></div></div><span>14%</span></div>
            <div class="rating-bar"><span>3★</span><div class="bar"><div class="fill" style="width:5%"></div></div><span>5%</span></div>
            <div class="rating-bar"><span>2★</span><div class="bar"><div class="fill" style="width:2%"></div></div><span>2%</span></div>
            <div class="rating-bar"><span>1★</span><div class="bar"><div class="fill" style="width:1%"></div></div><span>1%</span></div>
          </div>
        </div>
        <div class="review-list">
          <div class="review-card">
            <div class="review-header"><div class="reviewer-avatar av1">AM</div><div><strong>Alex M.</strong><span>Verified buyer · March 2026</span></div><div class="stars">★★★★★</div></div>
            <p>Best backpack I've owned. The laptop sleeve fits my 16" MacBook perfectly and the canvas is genuinely water resistant. Worth every penny.</p>
          </div>
          <div class="review-card">
            <div class="review-header"><div class="reviewer-avatar av2">SR</div><div><strong>Sam R.</strong><span>Verified buyer · Feb 2026</span></div><div class="stars">★★★★★</div></div>
            <p>Minimal and beautiful. Gets compliments every day. The straps are surprisingly comfortable for a pack this clean-looking.</p>
          </div>
          <div class="review-card">
            <div class="review-header"><div class="reviewer-avatar av3">JL</div><div><strong>Jordan L.</strong><span>Verified buyer · Jan 2026</span></div><div class="stars">★★★★☆</div></div>
            <p>Love the design. Wish the 32L was in stock. The 20L is a bit small for travel but perfect for daily commuting.</p>
          </div>
        </div>
      </div>
    </section>

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

Product Detail Page

A production-quality e-commerce product page covering the core PDP layout: thumbnail gallery with zoom preview, color/size variant selectors, quantity stepper, add-to-cart with loading state, and a star-rated review section.

Features

Image gallery — thumbnail strip + main image with fade transition
Variant picker — color swatches and size buttons with active/sold-out states
Quantity stepper — min/max clamped increment/decrement
Add to cart — loading spinner → success animation
Reviews section — star rating distribution bars + review cards
Breadcrumb and product metadata (SKU, stock status)

When to use it

Headless commerce storefronts
Shopify / WooCommerce theme prototypes
Any product landing page