File: overflow-inline-transform-relative.html

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<!DOCTYPE html>
<title>CSS Overflow and Transforms: css-overflow-3</title>
<link rel="author" title="mailto:atotic@google.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="help" href="https://www.w3.org/TR/css-overflow-3/#scrollable">
<meta name="assert" content="css transform is used to compute scroll overflow of inline-block children">
<style>
  #container {
    border: 1px solid black;
    width: 200px;
    overflow: auto;
  }
  #target {
    display: inline-block;
    width: 20px;
    height: 20px;
    background: green;
    position: relative;
    top: 100px;
    transform: translateY(80px);
  }
</style>
<!--
  #container should have vertical scrollbar because target is offset
  by position:relative and transform.
-->
<div id="container">
  <span>
    scroll
    <div id="target"></div>
    down
  </span>
</div>
<script>
  test(() => {
    assert_equals(document.querySelector("#container").scrollHeight, 200);
  }, '#target used transform when computing scroll overflow');
</script>