<!DOCTYPE html>
<html>
    <head>
        <title>Remove spanner between column rows</title>
        <script>
            function test() {
                var elm = document.getElementById('elm');
                elm.offsetTop; // trigger layout
                elm.style.display = 'none';
            }
        </script>
    </head>
    <body onload="test()">
        <p>There should be three columns with a total line count of 8. The three first lines should
        read "before". The fourth should read "before after". The last four should read "after":</p>
        <div style="-webkit-columns:3; columns:3; orphans:1; widows:1;">
            before<br>before<br>before<br>before
            <div id="elm" style="-webkit-column-span:all; column-span:all;"></div>
            after<br>after<br>after<br>after<br>after<br>
        </div>
    </body>
</html>