blankify

Every online purchase ends on this screen and it's simpler than you think #checkout #payment #css

Source Code

index.html
<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8"/>
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title>Checkout</title>
  <link rel="stylesheet" href="styles.css"/>
</head>
<body>
  <main class="card">
    <div class="preview">
      <div class="chip"></div>
      <p class="number">•••• •••• •••• ••••</p>
      <div class="details">
        <div>
          <small>VALID THRU</small>
          <span class="expiry">MM / YY</span>
        </div>
        <div>
          <small>CVC</small>
          <span class="cvc">•••</span>
        </div>
      </div>
    </div>
    <div class="field">
      <label>Card number</label>
      <input type="text" placeholder="1234 5678 9012 3456" maxlength="19" data-format="card"/>
    </div>
    <div class="row">
      <div class="field">
        <label>Expiry</label>
        <input type="text" placeholder="MM / YY" maxlength="7" data-format="expiry"/>
      </div>
      <div class="field">
        <label>CVC</label>
        <input type="text" placeholder="123" maxlength="3" data-format="digits"/>
      </div>
    </div>
    <button class="submit">Pay $49.99</button>
  </main>
  <script src="script.js" type="text/javascript" ></script>
</body>
</html>
styles.css
* {
  margin: 0;
  box-sizing: border-box;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: radial-gradient(ellipse at 60% 20%, #1a1025, #09090b 70%);
  font-family: system-ui, sans-serif;
}

.card {
  width: 380px;
  padding: 36px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(40px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.preview {
  height: 190px;
  padding: 24px;
  border-radius: 16px;
  background: linear-gradient(135deg, #1c1c2e, #2d1f3d, #3b2050);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.chip {
  width: 40px;
  height: 30px;
  border-radius: 6px;
  background: linear-gradient(135deg, #e2b865, #c9a24d);
}

.number {
  font-size: 20px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 3px;
}

.details {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}

.details small {
  display: block;
  font-size: 9px;
  color: rgba(255, 255, 255, 0.25);
  letter-spacing: 1px;
  margin-bottom: 2px;
}

label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 6px;
}

input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(255, 255, 255, 0.03);
  color: #e0e7ff;
  font-size: 14px;
  outline: none;
}

input:focus {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.1);
}

.row {
  display: flex;
  gap: 12px;
}

.row > * {
  flex: 1;
}

.submit {
  padding: 14px;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #312e81, #4338ca, #6366f1);
  box-shadow: 0 4px 20px rgba(67, 56, 202, 0.3);
}
script.js
const formatters = {
  card(value) {
    const digits = value.replace(/\D/g, "").slice(0, 16);
    return digits.replace(/(.{4})/g, "$1 ").trim();
  },

  expiry(value) {
    const digits = value.replace(/\D/g, "").slice(0, 4);
    if (digits.length < 2) return digits;
    return digits.slice(0, 2) + " / " + digits.slice(2);
  },

  digits(value) {
    return value.replace(/\D/g, "");
  },
};

const displayFormatters = {
  card(value) {
    const digits = value.replace(/\D/g, "");
    const padded = (digits + "•".repeat(16)).slice(0, 16);
    return padded.replace(/(.{4})/g, "$1 ").trim();
  },

  expiry(value) {
    const digits = value.replace(/\D/g, "");
    const padded = (digits + "•".repeat(4)).slice(0, 4);
    return padded.slice(0, 2) + " / " + padded.slice(2);
  },

  digits(value) {
    const digits = value.replace(/\D/g, "");
    return (digits + "•".repeat(3)).slice(0, 3);
  },
};

const cardDisplay = {
  card: document.querySelector(".number"),
  expiry: document.querySelector(".expiry"),
  digits: document.querySelector(".cvc"),

  update(field, value) {
    const formatter = displayFormatters[field];
    const element = this[field];
    if (formatter && element) {
      element.textContent = formatter(value);
    }
  },
};

document.addEventListener("DOMContentLoaded", () => {
  document.querySelectorAll("[data-format]").forEach((input) => {
    const field = input.dataset.format;
    const format = formatters[field];
    if (!format) return;

    input.addEventListener("input", () => {
      const cursor = input.selectionStart;
      const before = input.value.length;
      input.value = format(input.value);
      const after = input.value.length;
      input.setSelectionRange(cursor + after - before, cursor + after - before);

      cardDisplay.update(field, input.value);
    });
  });
});