HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <title>overscroll-behavior-block: inherit</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      margin: 16px;
      min-height: 160vh;
      color: #0f172a;
    }

    p {
      margin: 0 0 12px;
      max-width: 40rem;
      line-height: 1.5;
    }

    .outer {
      height: 220px;
      overflow: auto;
      overscroll-behavior-block: contain;
      box-sizing: border-box;
      padding: 12px;
      border: 2px dashed #334155;
      background: #f1f5f9;
    }

    .inner {
      height: 120px;
      overflow: auto;
      overscroll-behavior-block: inherit;
      box-sizing: border-box;
      padding: 10px;
      border: 1px solid #ccc;
      background: #fff;
    }

    .inner p,
    .outer > p {
      margin: 0 0 10px;
    }
  </style>
</head>
<body>
  <p>The outer box sets <code>contain</code>. The inner box uses <strong>overscroll-behavior-block: inherit</strong>, so it receives that same value.</p>
  <div class="outer">
    <p>Outer scroll area</p>
    <div class="inner">
      <p>Inner line 1</p>
      <p>Inner line 2</p>
      <p>Inner line 3</p>
      <p>Inner line 4</p>
    </div>
    <p>More outer content below the inner panel.</p>
    <p>Extra outer lines to allow outer scrolling.</p>
  </div>
</body>
</html>

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CSS overscroll-behavior-block Property — inherit