File: link-stylesheet-with-non-match-media-does-not-block-render.tentative.html

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<!DOCTYPE html>
<title>
  Delayed Stylesheet imported using link tag should not block rendering
  or JS execution when media doesn't match.
</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/utils.js"></script>
<link rel="stylesheet" href="support/link-style.css?pipe=trickle(d1)"
  media="print" onload="this.media='all'">
<h1>
  This text is black in color till stylesheet is fetched.
</h1>
<script>
test(() => {
  assert_false(styleExists("h1 { color: purple; }"),
               'Stylesheet should still be pending due to delay');
  const h1 = document.querySelector('h1');
  assert_equals(getComputedStyle(h1).color, 'rgb(0, 0, 0)');
});
</script>