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<!doctype html>
<html class="reftest-wait">
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<style>
div {
overflow: hidden;
border: 1px solid;
width: 20em;
}
</style>
<div id="host" contenteditable></div>
<script>
onload = () => {
host.focus();
requestAnimationFrame(() => {
requestAnimationFrame(() => {
synthesizeMouseAtCenter(host, {});
document.documentElement.className = "";
});
})
}
</script>