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Test Info: Warnings

<html class="reftest-wait">
<script>
let pp;
window.addEventListener("MozReftestInvalidate", finish);
document.addEventListener('DOMContentLoaded', () => {
let a = document.documentElement
pp = SpecialPowers.wrap(self).printPreview();
pp.document.adoptNode(a)
let b = document.createElementNS('http://www.w3.org/1999/xhtml', 'optgroup')
a.appendChild(b)
b.focus({ })
});
function finish() {
setTimeout(function () {
try { pp.close(); } catch (e) { }
document.documentElement.className = "";
}, 0);
}
// we don't get a MozReftestInvalidate event because the reftest-wait class
// on the document element can't be seen by the reftest harness because the
// documentElement gets removed from the document, so we use onbeforeunload to
// close the window.
onbeforeunload = finish;
</script>
</html>