Código HTML:
<!DOCTYPE html> <html lang="es-ES"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>Grid</title> <style type="text/css"> .grid {display:-ms-grid; -ms-grid-columns: 1fr 1fr 1fr;} .grid>*{height:1em; outline:1px solid red;} .grid>*:nth-child(1){-ms-grid-column: 1;} .grid>*:nth-child(2){-ms-grid-column: 2;} .grid>*:nth-child(3){-ms-grid-column: 3;} </style> </head> <body> <div class="grid"> <div></div> <div></div> <div></div> </div> </body> </html>