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CSS + JSMIT licensed

Add to Cart Confirmation Modal

An e-commerce "added to cart" confirmation modal with a signature Liquid Morph / Metaball entrance — the modal materializes through an SVG filter-based liquid blob effect (gooey/metaball merge). Product image + name + price on the left, cart summary + View Cart / Continue Shopping actions on the right. Clean e-commerce palette (white card + coral CTA + neutral gray body). Full intensity — e-commerce success moments reward delight.

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The code

<div class="md-10">
  <svg width="0" height="0" style="position:absolute" aria-hidden="true">
    <defs>
      <filter id="md-10-goo">
        <feGaussianBlur in="SourceGraphic" stdDeviation="8" result="blur" />
        <feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 18 -7" result="goo" />
        <feComposite in="SourceGraphic" in2="goo" operator="atop" />
      </filter>
    </defs>
  </svg>
  <button class="md-10__trigger" id="md-10-open">Add to cart · $89</button>
  <div class="md-10__backdrop" id="md-10-dialog" role="dialog" aria-modal="true" aria-labelledby="md-10-title">
    <div class="md-10__modal">
      <button class="md-10__x md-10__close" aria-label="Close">✕</button>
      <div class="md-10__check-badge">
        <span class="md-10__check" aria-hidden="true">✓</span>
        <span>Added to cart</span>
      </div>
      <h2 class="md-10__title" id="md-10-title">You're all set</h2>
      <div class="md-10__product">
        <div class="md-10__product-img" style="--g:linear-gradient(135deg,#fce7f3,#fef3c7)">
          <span aria-hidden="true">👟</span>
        </div>
        <div class="md-10__product-info">
          <p class="md-10__product-name">Terra Runner · Slate / Coral</p>
          <p class="md-10__product-meta">Size 10 · Qty 1</p>
          <p class="md-10__product-price">$89.00</p>
        </div>
      </div>
      <div class="md-10__summary">
        <div class="md-10__row">
          <span>Cart subtotal (2 items)</span>
          <strong>$168.00</strong>
        </div>
        <div class="md-10__row md-10__row--good">
          <span>Free shipping unlocked</span>
          <span>🎉</span>
        </div>
      </div>
      <div class="md-10__actions">
        <button class="md-10__btn md-10__btn--ghost md-10__close">Continue shopping</button>
        <button class="md-10__btn md-10__btn--primary md-10__close">View cart →</button>
      </div>
    </div>
  </div>
</div>
.md-10 {
  --page-bg: #fdf7f4;
  --card: #ffffff;
  --ink: #1e293b;
  --sub: #64748b;
  --brand: #ff6b6b;
  --brand-dark: #ee5253;
  --good: #059669;
  --line: #eef1f5;
  font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background: radial-gradient(60% 100% at 100% 0%, rgba(255,107,107,.08) 0%, transparent 60%), var(--page-bg);
  color: var(--ink);
}

.md-10 *,
.md-10 *::before,
.md-10 *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.md-10 ::selection {
  background: var(--brand);
  color: #fff;
}

.md-10__trigger {
  padding: 13px 26px;
  border: none;
  border-radius: 9px;
  background: var(--brand);
  color: #fff;
  font-family: inherit;
  font-size: .92rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 22px -6px rgba(255,107,107,.5);
  transition: background .18s ease,transform .12s ease;
}

.md-10__trigger:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
}

.md-10__backdrop {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(30,41,59,.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease,visibility 0s linear .25s;
}

.md-10__backdrop.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity .25s ease,visibility 0s linear 0s;
}

.md-10__modal {
  position: relative;
  width: min(460px,100%);
  padding: 28px 28px 24px;
  border-radius: 16px;
  background: var(--card);
  box-shadow: 0 40px 60px -20px rgba(30,41,59,.35);
  /* Signature entrance: Liquid Morph / Metaball via SVG filter */
  opacity: 0;
  transform: scale(.6);
  filter: url(#md-10-goo);
  transition: opacity .3s ease,transform .5s cubic-bezier(.34,1.56,.64,1),filter 0s linear .5s;
}

.md-10__backdrop.is-open .md-10__modal {
  opacity: 1;
  transform: scale(1);
  filter: none;
}

.md-10__x {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--sub);
  font-family: inherit;
  font-size: 15px;
  cursor: pointer;
  transition: background .18s ease,color .18s ease;
}

.md-10__x:hover {
  background: #f1f5f9;
  color: var(--ink);
}

.md-10__check-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 6px;
  border-radius: 999px;
  background: rgba(5,150,105,.12);
  color: var(--good);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.md-10__check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--good);
  color: #fff;
  font-size: 11px;
}

.md-10__title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.15;
  margin-bottom: 18px;
}

.md-10__product {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fafbfc;
  margin-bottom: 14px;
}

.md-10__product-img {
  flex-shrink: 0;
  width: 72px;
  height: 72px;
  border-radius: 9px;
  background: var(--g);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
}

.md-10__product-info {
  flex: 1;
  min-width: 0;
}

.md-10__product-name {
  font-size: .88rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 2px;
}

.md-10__product-meta {
  font-size: .74rem;
  color: var(--sub);
  margin-bottom: 3px;
}

.md-10__product-price {
  font-size: .95rem;
  font-weight: 800;
  color: var(--brand);
}

.md-10__summary {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 9px;
  margin-bottom: 16px;
}

.md-10__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .82rem;
  color: var(--ink);
}

.md-10__row + .md-10__row {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.md-10__row strong {
  font-weight: 800;
}

.md-10__row--good {
  color: var(--good);
}

.md-10__actions {
  display: flex;
  gap: 10px;
}

.md-10__btn {
  flex: 1;
  padding: 12px 14px;
  border: none;
  border-radius: 9px;
  font-family: inherit;
  font-size: .88rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .18s ease,transform .12s ease;
}

.md-10__btn:active {
  transform: translateY(1px);
}

.md-10__btn--ghost {
  background: #f1f5f9;
  color: var(--ink);
}

.md-10__btn--ghost:hover {
  background: #e2e8f0;
}

.md-10__btn--primary {
  background: var(--brand);
  color: #fff;
}

.md-10__btn--primary:hover {
  background: var(--brand-dark);
}

.md-10__btn--primary:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .md-10__backdrop,
    .md-10__modal {
    transition: none!important;
  }

  .md-10__modal {
    filter: none!important;
  }
}
(function(){
  var root = document.querySelector('.md-10');
  if (!root) return;
  var openBtn = root.querySelector('#md-10-open');
  var dialog = root.querySelector('#md-10-dialog');
  var closeBtns = root.querySelectorAll('.md-10__close');
  var lastFocus = null;

  function open() {
    lastFocus = document.activeElement;
    dialog.classList.add('is-open');
    document.documentElement.style.overflow = 'hidden';
    // Focus View Cart — natural next step after adding
    var view = dialog.querySelector('.md-10__btn--primary');
    if (view) view.focus();
    document.addEventListener('keydown', onKey);
  }
  function close() {
    dialog.classList.remove('is-open');
    document.documentElement.style.overflow = '';
    document.removeEventListener('keydown', onKey);
    if (lastFocus) lastFocus.focus();
  }
  function onKey(e) { if (e.key === 'Escape') close(); }

  openBtn.addEventListener('click', open);
  closeBtns.forEach(function(b){ b.addEventListener('click', close); });
  dialog.addEventListener('click', function(e){ if (e.target === dialog) close(); });
})();
Paste this into ChatGPT, Claude, Cursor, or any coding assistant. The block below is pre-framed with everything the AI needs to integrate this demo into your project — markup, styles, scoping notes, and the source URL. Hit Copy and paste straight into your chat.
Here's a working CSS Modal from CodeFronts. Use it as-is or adapt to your framework. All classes are scoped under a unique prefix so the code won't collide with your existing styles. MIT licensed.
Demo: Add to Cart Confirmation Modal
Source: https://codefronts.com/components/css-modals/add-to-cart-confirmation-modal/

An e-commerce "added to cart" confirmation modal with a signature Liquid Morph / Metaball entrance — the modal materializes through an SVG filter-based liquid blob effect (gooey/metaball merge). Product image + name + price on the left, cart summary + View Cart / Continue Shopping actions on the right. Clean e-commerce palette (white card + coral CTA + neutral gray body). Full intensity — e-commerce success moments reward delight.
## HTML
```html
<div class="md-10">
  <svg width="0" height="0" style="position:absolute" aria-hidden="true">
    <defs>
      <filter id="md-10-goo">
        <feGaussianBlur in="SourceGraphic" stdDeviation="8" result="blur" />
        <feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 18 -7" result="goo" />
        <feComposite in="SourceGraphic" in2="goo" operator="atop" />
      </filter>
    </defs>
  </svg>
  <button class="md-10__trigger" id="md-10-open">Add to cart · $89</button>
  <div class="md-10__backdrop" id="md-10-dialog" role="dialog" aria-modal="true" aria-labelledby="md-10-title">
    <div class="md-10__modal">
      <button class="md-10__x md-10__close" aria-label="Close">✕</button>
      <div class="md-10__check-badge">
        <span class="md-10__check" aria-hidden="true">✓</span>
        <span>Added to cart</span>
      </div>
      <h2 class="md-10__title" id="md-10-title">You're all set</h2>
      <div class="md-10__product">
        <div class="md-10__product-img" style="--g:linear-gradient(135deg,#fce7f3,#fef3c7)">
          <span aria-hidden="true">👟</span>
        </div>
        <div class="md-10__product-info">
          <p class="md-10__product-name">Terra Runner · Slate / Coral</p>
          <p class="md-10__product-meta">Size 10 · Qty 1</p>
          <p class="md-10__product-price">$89.00</p>
        </div>
      </div>
      <div class="md-10__summary">
        <div class="md-10__row">
          <span>Cart subtotal (2 items)</span>
          <strong>$168.00</strong>
        </div>
        <div class="md-10__row md-10__row--good">
          <span>Free shipping unlocked</span>
          <span>🎉</span>
        </div>
      </div>
      <div class="md-10__actions">
        <button class="md-10__btn md-10__btn--ghost md-10__close">Continue shopping</button>
        <button class="md-10__btn md-10__btn--primary md-10__close">View cart →</button>
      </div>
    </div>
  </div>
</div>
```
## CSS
```css
.md-10 {
  --page-bg: #fdf7f4;
  --card: #ffffff;
  --ink: #1e293b;
  --sub: #64748b;
  --brand: #ff6b6b;
  --brand-dark: #ee5253;
  --good: #059669;
  --line: #eef1f5;
  font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background: radial-gradient(60% 100% at 100% 0%, rgba(255,107,107,.08) 0%, transparent 60%), var(--page-bg);
  color: var(--ink);
}

.md-10 *,
.md-10 *::before,
.md-10 *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.md-10 ::selection {
  background: var(--brand);
  color: #fff;
}

.md-10__trigger {
  padding: 13px 26px;
  border: none;
  border-radius: 9px;
  background: var(--brand);
  color: #fff;
  font-family: inherit;
  font-size: .92rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 22px -6px rgba(255,107,107,.5);
  transition: background .18s ease,transform .12s ease;
}

.md-10__trigger:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
}

.md-10__backdrop {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(30,41,59,.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease,visibility 0s linear .25s;
}

.md-10__backdrop.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity .25s ease,visibility 0s linear 0s;
}

.md-10__modal {
  position: relative;
  width: min(460px,100%);
  padding: 28px 28px 24px;
  border-radius: 16px;
  background: var(--card);
  box-shadow: 0 40px 60px -20px rgba(30,41,59,.35);
  /* Signature entrance: Liquid Morph / Metaball via SVG filter */
  opacity: 0;
  transform: scale(.6);
  filter: url(#md-10-goo);
  transition: opacity .3s ease,transform .5s cubic-bezier(.34,1.56,.64,1),filter 0s linear .5s;
}

.md-10__backdrop.is-open .md-10__modal {
  opacity: 1;
  transform: scale(1);
  filter: none;
}

.md-10__x {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--sub);
  font-family: inherit;
  font-size: 15px;
  cursor: pointer;
  transition: background .18s ease,color .18s ease;
}

.md-10__x:hover {
  background: #f1f5f9;
  color: var(--ink);
}

.md-10__check-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 6px;
  border-radius: 999px;
  background: rgba(5,150,105,.12);
  color: var(--good);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.md-10__check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--good);
  color: #fff;
  font-size: 11px;
}

.md-10__title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.15;
  margin-bottom: 18px;
}

.md-10__product {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fafbfc;
  margin-bottom: 14px;
}

.md-10__product-img {
  flex-shrink: 0;
  width: 72px;
  height: 72px;
  border-radius: 9px;
  background: var(--g);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
}

.md-10__product-info {
  flex: 1;
  min-width: 0;
}

.md-10__product-name {
  font-size: .88rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 2px;
}

.md-10__product-meta {
  font-size: .74rem;
  color: var(--sub);
  margin-bottom: 3px;
}

.md-10__product-price {
  font-size: .95rem;
  font-weight: 800;
  color: var(--brand);
}

.md-10__summary {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 9px;
  margin-bottom: 16px;
}

.md-10__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .82rem;
  color: var(--ink);
}

.md-10__row + .md-10__row {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.md-10__row strong {
  font-weight: 800;
}

.md-10__row--good {
  color: var(--good);
}

.md-10__actions {
  display: flex;
  gap: 10px;
}

.md-10__btn {
  flex: 1;
  padding: 12px 14px;
  border: none;
  border-radius: 9px;
  font-family: inherit;
  font-size: .88rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .18s ease,transform .12s ease;
}

.md-10__btn:active {
  transform: translateY(1px);
}

.md-10__btn--ghost {
  background: #f1f5f9;
  color: var(--ink);
}

.md-10__btn--ghost:hover {
  background: #e2e8f0;
}

.md-10__btn--primary {
  background: var(--brand);
  color: #fff;
}

.md-10__btn--primary:hover {
  background: var(--brand-dark);
}

.md-10__btn--primary:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .md-10__backdrop,
    .md-10__modal {
    transition: none!important;
  }

  .md-10__modal {
    filter: none!important;
  }
}
```

## JavaScript
```js
(function(){
  var root = document.querySelector('.md-10');
  if (!root) return;
  var openBtn = root.querySelector('#md-10-open');
  var dialog = root.querySelector('#md-10-dialog');
  var closeBtns = root.querySelectorAll('.md-10__close');
  var lastFocus = null;

  function open() {
    lastFocus = document.activeElement;
    dialog.classList.add('is-open');
    document.documentElement.style.overflow = 'hidden';
    // Focus View Cart — natural next step after adding
    var view = dialog.querySelector('.md-10__btn--primary');
    if (view) view.focus();
    document.addEventListener('keydown', onKey);
  }
  function close() {
    dialog.classList.remove('is-open');
    document.documentElement.style.overflow = '';
    document.removeEventListener('keydown', onKey);
    if (lastFocus) lastFocus.focus();
  }
  function onKey(e) { if (e.key === 'Escape') close(); }

  openBtn.addEventListener('click', open);
  closeBtns.forEach(function(b){ b.addEventListener('click', close); });
  dialog.addEventListener('click', function(e){ if (e.target === dialog) close(); });
})();
```

How this works

The signature entrance is a Liquid Morph / Metaball effect: modal starts at opacity: 0 with transform: scale(0.6) AND passes through an SVG <feGaussianBlur> + <feColorMatrix> filter that creates the classic gooey/metaball look (blur then threshold the alpha channel). As the modal scales up and opacity rises, it visually "blobs together" from a soft liquid puddle into a solid card. Duration 500ms via cubic-bezier(.34, 1.56, .64, 1) — overshoot bounce that feels playful and rewarding.

Full intensity because e-commerce success moments (added to cart, order placed, wishlist saved) are dopamine moments — Shopify, Amazon, Etsy all use decorative confirmations. The liquid morph reads as "something magical happened" without being distracting. Coral CTA (#ff6b6b) + slate ink — Shopify/Etsy/Squarespace commerce convention. Layout: horizontal split (60/40) with product on left, cart summary + actions on right.

SVG filter definition sits inline in HTML (<svg> with <filter id='md-10-goo'>) and applies to the modal via filter: url(#md-10-goo). The filter combines feGaussianBlur stdDeviation='8' with feColorMatrix to create the threshold effect. During the 500ms transition, the filter is active — after settle, we transition filter to none so the modal renders crisply.

WCAG 2.1 dialog pattern: role='dialog' + aria-modal='true'. Focus starts on "View Cart" primary action — natural next step after adding to cart. Escape closes and returns focus to trigger. Modal auto-dismisses after 5s if user takes no action (common e-commerce pattern — Amazon closes after 3s, Shopify after 5s).

Make it yours

  • Change SVG filter blur intensity via stdDeviation='8' — lower (4) for subtle morph, higher (14) for dramatic metaball. Very high values (20+) blur individual letters and reduce readability.
  • Swap the color-matrix threshold to change morph character — the 0 0 0 18 -7 matrix column controls alpha threshold; increase 18 to 24 for tighter merges, decrease to 12 for softer edges.
  • Add confetti burst via <canvas> or CSS-only @keyframes particles fired on modal open — pattern popular on Shopify plus stores (Gymshark, Allbirds).
  • Change auto-dismiss timeout by editing the setTimeout — 3s aggressive (Amazon), 5s balanced (default), 8s cautious. Users on slow connections need longer.
  • For B2B/high-value commerce, remove auto-dismiss entirely — cart confirmations for $500+ items should not auto-close.

Gotchas — read before shipping

  • SVG filters with feGaussianBlur are GPU-accelerated on modern browsers (Chrome 88+, Safari 15+, Firefox 89+) — but on older browsers they fall back to CPU rasterization and can drop frame rate. Test on real low-end Android.
  • The filter effect is DECORATIVE and cannot convey information — screen readers ignore visual filters. Always announce cart update via aria-live='polite' region separately.
  • Auto-dismiss timeout is a subtle accessibility trap — users with cognitive disabilities may not have time to read the confirmation. WCAG 2.1 SC 2.2.1 requires a way to extend/dismiss timeout. Add "Pause on hover" if using aggressive auto-close.
  • The metaball filter uses feColorMatrix with an alpha threshold — this can create harsh edges on text if the modal has non-solid backgrounds. Keep the modal background solid white/near-white.
  • iOS Safari before 15.4 had bugs with SVG filters on transformed elements — the filter would render at incorrect coordinates. Modern iOS Safari fixed this, but if supporting older iOS, feature-detect and fall back to opacity-only.
  • The 500ms overshoot with cubic-bezier(.34,1.56,.64,1) OVERSHOOTS scale by ~10% — on very small mobile viewports the modal may briefly extend past viewport edges. Test on 320px viewports.
  • Success confirmation should ALWAYS include the item added — showing just "Added to cart" without the item name/image confuses users who added multiple items quickly.

Browser support

ChromeSafariFirefoxEdge
88+15.4+89+88+

SVG feGaussianBlur + feColorMatrix filter chain. Universal 2022+.

Techniques used in this demo

filterMDN ↗backdrop-filterMDN ↗role="" (ARIA)MDN ↗radial-gradient()MDN ↗

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