css/css-overflow/overflow-clip-margin-005.html

<!doctype html>
<meta charset="utf-8">
<title>Verifies overflow-clip-margin impacts layout</title>
<link rel="help" href="https://www.w3.org/TR/css-overflow-3/#propdef-overflow-clip-margin">
<link rel="author" title="Scott Violet" href="mailto:sky@chromium.org">
<link rel="match" href="overflow-clip-margin-005-ref.html">
<style>
  .scroller {
      overflow: auto;
      width: 100px;
      height: 100px;
  }
  .parent {
      width: 100px;
      height: 100px;
      contain: paint;
      overflow-clip-margin: 10px;
  }
  .child {
      width: 200px;
      height: 200px;
      position: relative;
      top: -50px;
      left: -50px;
      background-color: green;
  }
</style>
<p>You should see a green box with scrollbars.</p>
<div class="scroller">
  <div class="parent">
    <div class="child"></div>
  </div>
</div>

<p>You should see a green box with scrollbars.</p>
<div class="scroller">
  <div class="parent" style="overflow-clip-margin: 100px">
    <div class="child"></div>
  </div>
</div>

<p>You should see a green box with no scrollbars.</p>
<div class="scroller">
  <div class="parent" style="background-color: green">
  </div>
</div>