File: fontface-load-in-modal-dialog.html

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<!doctype html>
<link rel="author" title="Xiaocheng Hu" href="xiaochengh@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-font-loading/#font-face-load">
<link rel="help" href="https://crbug.com/1092411">
<meta name="assert" content="Ensure that content of a modal dialog is re-rendered with loaded web font." />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#target {
  font: 25px/1 custom-font, monospace;
}
</style>
<dialog><span id=target>0123456789</span></dialog>
<script>
document.querySelector('dialog').showModal();

function raf() {
  return new Promise(resolve => requestAnimationFrame(resolve));
}

promise_test(async () => {
  await raf();

  const face = new FontFace('custom-font', 'url(/fonts/Ahem.ttf)');
  document.fonts.add(face);
  await face.load();

  assert_equals(target.offsetWidth, 250);
}, 'Modal dialog content should be re-rendered with loaded web font');
</script>