| <!DOCTYPE HTML> | |
| <html class="focus-within"> | |
| <head> | |
| <style> | |
| * { | |
| border: none; | |
| } | |
| .focus-within { | |
| border: 2px solid green; | |
| } | |
| </style> | |
| </head> | |
| <body class="focus-within"> | |
| <form id="form"> | |
| </form> | |
| <div class="focus-within"> | |
| <input form="form" id="input" autofocus class="focus-within"> | |
| </div> | |
| <script> | |
| document.getElementById("input").focus(); | |
| </script> | |
| </body> | |
| </html> |