File: chrome-443261872.html

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<!DOCTYPE html>
<title>Chrome bug 443261872: style attribute invalidation for tree-scoped anchor-name</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position/#name">
<link rel="help" href="https://crbug.com/443261872">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
</style>
<div id="host">
  <template shadowrootmode="open">
    <style>
      #anchor {
        width: 100px;
        height: 100px;
      }
      #anchored {
        position-anchor: --panel-anchor;
        position: absolute;
        inset: anchor(top) anchor(right) anchor(bottom) anchor(left);
      }
    </style>
    <div id="anchor" style="anchor-name:--panel-anchor; color:yellow"></div>
    <div id="anchored"></div>
  </template>
</div>
<script>
  test(() => {
    const anchor = host.shadowRoot.querySelector("#anchor");
    const anchored = host.shadowRoot.querySelector("#anchored");
    anchored.offsetTop;
    anchor.style.color = "pink";
    assert_equals(anchored.offsetWidth, 100);
  }, "Changing inline style color does not change tree-scope for anchor-name");
</script>