<!DOCTYPE HTML> <html><head> <meta charset="utf-8"> <title>Testcase for bug 1229999</title> <style type="text/css"> html,body { color:black; background-color:white; font-size:16px; padding:0; margin:0; } .grid { position: fixed; bottom: 0; display: grid; grid-auto-rows: 1px; grid-auto-columns: 10px; border: 1px solid; } x { position: absolute; grid-row-start: span 2; top:0; bottom:0; left:10px; width:20px; background: grey; } y { background:blue; } y:nth-of-type(2n+1) { background:lime; } </style> </head> <body> <div class="grid"> <span style="grid-row-start: A -4;"></span> <span style="grid-row-end: span 134217729; background:yellow"></span> <y></y><y></y><y></y><y></y><y></y><y></y> <y></y><y></y><y></y><y></y><y></y><y></y> <x></x> </div> <div class="grid" style="left:50px;"> <span style="grid-row-start: A -3;"></span> <span style="grid-row-end: span 134217729; background:yellow"></span> <y></y><y></y><y></y><y></y><y></y><y></y> <y></y><y></y><y></y><y></y><y></y><y></y> <x></x> </div> <div class="grid" style="left:100px;"> <span style="grid-row-start: A -2;"></span> <span style="grid-row-end: span 134217729; background:yellow"></span> <y></y><y></y><y></y><y></y><y></y><y></y> <y></y><y></y><y></y><y></y><y></y><y></y> <x></x> </div> <div class="grid" style="left:150px;"> <span style="grid-row-start: A -1;"></span> <span style="grid-row-end: span 134217729; background:yellow"></span> <y></y><y></y><y></y><y></y><y></y><y></y> <y></y><y></y><y></y><y></y><y></y><y></y> <x></x> </div> <div class="grid" style="left:150px;"> <span style="grid-row-start: 1;"></span> <span style="grid-row-end: span 134217729; background:yellow"></span> <y></y><y></y><y></y><y></y><y></y><y></y> <y></y><y></y><y></y><y></y><y></y><y></y> <x></x> </div> <div class="grid" style="left:200px;"> <span style="grid-row-end: span 134217729; background:yellow"></span> <y></y><y></y><y></y><y></y><y></y><y></y> <y></y><y></y><y></y><y></y><y></y><y></y> <x></x> </div> </body> </html>