| <!DOCTYPE html> |
| <script> |
| onload = function() { |
| document.body.offsetTop; // trigger layout |
| document.getElementById('elm').className = "x"; |
| } |
| </script> |
| <style> |
| .x::before { display:block; -webkit-column-span:all; background:yellow; content:".........."; } |
| </style> |
| <p>Test adding a ::before pseudo element.</p> |
| <p>There should be two rectangles with identical sizes below. The first one should be yellow |
| with some dots inside. The second one should be blue with nothing inside.</p> |
| <div style="-webkit-columns:4; line-height:100px; background:blue;"> |
| <span id="elm"> </span> |
| </div> |
