3👍
✅
Pseudo elements require a content
property to be visible, add content: ""
to solve this issue
.subline::before {
content: "";
width: 30px;
height: 20px;
z-index: 99999;
border-bottom: dashed 2px green;
position: fixed;
bottom: 0;
left: 0;
}
Source:stackexchange.com