564968.xhtml (756B)
1 <html xmlns="http://www.w3.org/1999/xhtml"> 2 <head> 3 <style> 4 .container { 5 height: 1em; 6 } 7 .overflow { 8 height: 8em; 9 } 10 body { 11 font-family: monospace; 12 height: 8em; 13 line-height: 1em; 14 column-count: 2; 15 column-gap: 0; 16 } 17 </style> 18 <script> 19 function boom() 20 { 21 document.documentElement.offsetHeight; 22 document.getElementById('x').style.display = 'none'; 23 document.documentElement.offsetHeight; 24 document.getElementById('y').style.display = 'none'; 25 } 26 </script> 27 </head> 28 29 <body style="width: 17ch;" onload="boom();"><div id="x" class="container"></div>This paragraph must be in the first column.<div class="container" id="y"><div class="overflow"></div></div></body> 30 </html>