fontface-loadingevent.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-font-loading/fontface-loadingevent.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Tests FontFaceSet loading event</title>

<link rel="help" href="https://drafts.csswg.org/css-font-loading/#events">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script>

promise_test(async t => {

  const fontSet = document.fonts;

  let loadingFired = false;

  fontSet.addEventListener("loading", () => {

    loadingFired = true;

});

  const TestFont = new FontFace("GoodFont", "url(/fonts/Ahem.ttf)");

  fontSet.add(TestFont);

  await TestFont.load();

  await fontSet.ready;

  assert_true(loadingFired, "The 'loading' event should have fired");

}, "FontFaceSet fires correct loading event");

</script>