<!DOCTYPE html>
<html>
    <head>
        <title>Remove all content from row between spanners, then insert some content there</title>
        <style>
            .spanner { -webkit-column-span:all; column-span:all; }
        </style>
    </head>
    <body>
        <p>You should see three lines with the word "PASS" on a lime background below.</p>
        <div style="float:left;">
            <div style="-webkit-columns:4; columns:4; column-gap:0; -webkit-column-gap:0; orphans:1; widows:1; background:lime;">
                <div class="spanner">PASS</div>
                <div>P<br>A<br>S<br>S</div>
                <div class="spanner">PASS</div>
            </div>
        </div>
    </body>
</html>