<!doctype html>
<meta charset="utf-8">
<title>CSSOM: getComputedStyle gets invalidated for display: none elements (inheritance)</title>
<link rel="help" href="https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle">
<link rel="help" href="https://bugs.webkit.org/show_bug.cgi?id=186882">
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<style>
#undisplayed, #host {
  display: none;
  color: red;
}
</style>
<div id="undisplayed"><div id="child"></div></div>
<div id="host"></div>
<script>
  test(function() {
    let undisplayed_style = getComputedStyle(undisplayed);
    let undisplayed_child_style = getComputedStyle(child);
    assert_equals(undisplayed_style.color, "rgb(255, 0, 0)");
    assert_equals(undisplayed_child_style.color, "rgb(255, 0, 0)");
    undisplayed.style.color = "green";
    assert_equals(undisplayed_style.color, "rgb(0, 128, 0)");
    assert_equals(undisplayed_child_style.color, "rgb(0, 128, 0)");
  }, "getComputedStyle gets invalidated in display: none subtrees due to inherited changes to an ancestor");
  test(function() {
    host.attachShadow({ mode: 'open' }).innerHTML = `
      <div></div>
    `;
    let host_style = getComputedStyle(host);
    let shadow_style = getComputedStyle(host.shadowRoot.firstElementChild);
    assert_equals(host_style.color, "rgb(255, 0, 0)");
    assert_equals(shadow_style.color, "rgb(255, 0, 0)");
    host.style.color = "green";
    assert_equals(host_style.color, "rgb(0, 128, 0)");
    assert_equals(shadow_style.color, "rgb(0, 128, 0)");
  }, "getComputedStyle gets invalidated in display: none subtrees due to inherited changes to an ancestor shadow host");
</script>