<!DOCTYPE html>
<html>
<head id="head">
<script>
if (window.internals) {
    internals.invalidateFontCache();
    internals.clearMemoryCache();
}
</script>
<style id="style">
@font-face {
    font-family: "WebFont";
    src: url("../../resources/Ahem.ttf") format("truetype");
}
</style>
<script src="../../resources/js-test.js"></script>
</head>
<body>
<script>
description("This function makes sure document.fonts.check() is affected by style changes.");
let fonts = document.fonts;
shouldBeTrue("fonts.check('12px ThisIsNotARealFont')");
shouldBeFalse("fonts.check('12px WebFont')");
fonts.values().next().value.load();
shouldBeFalse("fonts.check('12px WebFont')");
document.getElementById("head").removeChild(document.getElementById("style"));
// https://drafts.csswg.org/css-font-loading-3/#font-face-set-check
// "if none of the specified fonts exist (for example, names are mis-spelled), the method also returns true"
shouldBeTrue("fonts.check('12px WebFont')");
</script>
</body>
</html>