<!DOCTYPE html>
<html>
    <head>
        <title>Inline-block as spanner (not allowed)</title>
    </head>
    <body>
        <p>The inline block should be contained in a single column below.</p>
        <div style="-webkit-columns:2; columns:2; -webkit-column-gap:0; column-gap:0; width:400px; ">
            <div style="display:inline-block; width:100%; height:100px;-webkit-column-span:all; column-span:all; margin-left:1em;border:5px solid green">
                
            </div>
            <br><br>
        </div>
    </body>
</html>