<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Content Inserted in Pagination after ::before</title> <style type="text/css"> body { font-size: 16px; } #colset { height: 200px; width: 450px; column-width: 150px; column-gap: 0; column-fill: auto; border: 3px solid silver; } #x { height: 500px; } #x:before { display: block; height: 201px; content: ""; border-bottom: 4px solid blue; } #shift { height: 220px; border-top: 4px solid blue; } </style> </head> <body onload="document.getElementById('x').insertBefore(document.createTextNode('This must be in the second column between two 4px blue lines.'), document.getElementById('shift'))"> <div id="colset"> <div id="x"><div id="shift"></div></div> </div> </body> </html>