<!DOCTYPE html>
<html>
<head>
<title>Reference test for bug 86418</title>
</head>
<frameset rows="300px,*">
<frame src="data:text/html,
    <style>
    div {
        width: 50vh;
        height: 50vh;
        background: #36C;
    }</style>
    <div></div>
<p>Bug 86418: This tests that on resizing initial containing block vertically,
 element with 'vh' length gets resized.</p>
<p>Blue square should be half the height of frame height.</p>
"></frame>
<frame src=""></frame>
</frameset>
</html>