root-scroll-marker-activation-iframe.html (520B)
1 <!DOCTYPE html> 2 <meta charset="utf-8"> 3 <title>CSS Overflow: ::scroll-marker with ::scroll-marker-group doesn't propagate scroll from frame</title> 4 <style> 5 :root { 6 scroll-marker-group: before; 7 } 8 9 .item { 10 height: 100vh; 11 } 12 13 .item::scroll-marker { 14 content: ''; 15 background-color: blue; 16 width: 20px; 17 height: 20px; 18 display: inline-block; 19 margin-left: 10px; 20 } 21 </style> 22 <div class=item></div> 23 <div class=item></div> 24 <div class=item></div> 25 <div class=item></div> 26 <div class=item></div>