scroller-with-child-ref.html

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<!DOCTYPE html>

<html>

<head>

<style>

body { margin: 20px; font: 18pt monospace; line-height: 30px; }

#scope { overflow: auto; contain: layout; padding: 20px;

  width: 200px; height: 100px; border: 20px solid #acf; }

#part-hide { padding: 10px; visibility: hidden;

  border: 4px solid orange; width: 150px; height: 180px;

  margin: 20px 0 0 90px; }

#part { position: absolute; top: 66px; will-change: transform;

  background: #fac; padding: 10px; border: 4px solid orange;

  width: 150px; height: 180px; margin: 20px 0 0 90px; }

</style>

</head>

<body>

<div id=scope>World

  <div id=part-hide></div>

</div>

<!-- TODO(crbug.com/468277656): The child currently pops out of the

     scope's clip; this will be addressed by the nesting proposal in:

     https://github.com/w3c/csswg-drafts/issues/12324 -->

<div id=part>child</div>

<script>

scope.scrollBy(40, 24);

</script>

</body>

</html>