File: image-001.html

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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Scroll Anchoring: Anchor node can be an image</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring/#anchor-node-selection">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/4247">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1540203">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
body { height: 4000px }
#spacer { height: 100px }
img {
  width: 500px;
  height: 500px;
  background: green;
}
</style>
<div id=spacer></div>
<br><br>
<img>
<script>
test(() => {
  document.scrollingElement.scrollTop = 150;
  document.querySelector("#spacer").style.height = "150px";
  assert_equals(document.scrollingElement.scrollTop, 200);
}, "Anchor selection can select images");
</script>