HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <title>overscroll-behavior-block drawer</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      margin: 0;
      min-height: 160vh;
      background: #e2e8f0;
      color: #0f172a;
    }

    .page {
      padding: 16px;
      max-width: 36rem;
      line-height: 1.5;
    }

    .drawer {
      position: fixed;
      top: 0;
      right: 0;
      width: 260px;
      height: 100vh;
      display: flex;
      flex-direction: column;
      background: #fff;
      border-left: 1px solid #ccc;
    }

    .drawer h2 {
      margin: 0;
      padding: 12px;
      border-bottom: 1px solid #e2e8f0;
      font-size: 1rem;
    }

    .drawer-body {
      flex: 1;
      overflow: auto;
      overscroll-behavior-block: contain;
      padding: 12px;
    }

    .drawer-body p {
      margin: 0 0 12px;
      line-height: 1.5;
    }
  </style>
</head>
<body>
  <div class="page">
    <p>This page is tall on purpose. Scroll the drawer body to its top or bottom — <strong>overscroll-behavior-block: contain</strong> keeps the page behind still.</p>
  </div>
  <aside class="drawer" aria-label="Settings drawer">
    <h2>Settings</h2>
    <div class="drawer-body">
      <p><strong>Profile</strong> — Update your display name.</p>
      <p><strong>Notifications</strong> — Choose email alerts.</p>
      <p><strong>Privacy</strong> — Manage visibility settings.</p>
      <p><strong>Security</strong> — Enable two-factor auth.</p>
      <p><strong>Billing</strong> — View invoices and payments.</p>
      <p><strong>Help</strong> — Browse docs and contact support.</p>
    </div>
  </aside>
</body>
</html>

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CSS overscroll-behavior-block Property — drawer body