getComputedStyle-sticky-pos-percent.html

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This WPT test may be referenced by the following Test IDs:
- /css/cssom/getComputedStyle-sticky-pos-percent.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>CSS Test: resolve top percentage value against proper box</title>

<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/3115" />

<link rel="help" href="https://drafts.csswg.org/css-position/#sticky-pos" />

<link rel="help" href="https://drafts.csswg.org/cssom/#resolved-values" />

<meta name="assert" content="Test that the sticky percentage insets are

resolved against the right ancestor, i.e. the nearest scrollport." />

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div style="height: 500px; background: purple; overflow: hidden;">

  <div style="height: 400px; background: yellow;">

    <div id="target" style="height: 100px; position: sticky; left: 0; top: 50%; background: blue;">

    </div>

  </div>

</div>

<script>

test(() => {

  assert_equals(getComputedStyle(target).top, '250px');

}, "Sticky element's top property percentage value should be resolved against the div with overflow: hidden");

</script>