<!DOCTYPE HTML> <!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <html><head> <meta charset="utf-8"> <title>Test simple track sizing and grid item layout</title> <style> html,body { color:black; background-color:white; font-size:16px; padding:0; margin:0; } span { border: 3px dashed; margin:3px 5px 7px 11px; } .grid { display: grid; grid-auto-flow: column; grid-template-columns: 37px 57px 73px; grid-auto-rows: 47px; grid-auto-columns: 53px; } span.bg { background: lime; border: 0 none; } </style> </head> <body> <div class="grid"> <span style="grid-column: 1; grid-row: 2;" class="bg"></span> <span style="grid-column: 1; grid-row: 2;">1</span> <span style="grid-column: 2; grid-row: 1;" class="bg"></span> <span style="grid-column: 2; grid-row: 1;">2</span> <span style="grid-column: 3; grid-row: 1;" class="bg"></span> <span style="grid-column: 3; grid-row: 1; margin:0">3</span> <span style="grid-column: 1 / span 2; margin-top:0; width:500px" class="bg">4</span> <span style="grid-column: 1 / span 2; margin:0; height:10px;" class="bg">5</span> </div> </body> </html>