JSFiddle - React, Tailwind, and code Playground

by Jordan Dayton

HTML

<div class="bordertest"></div>
<div class="bordertest"></div>

CSS

.bordertest {
    height:3px;
    width:300px;
    border-top:3px solid #c4268c;
    background:#000;
    position:relative;
    margin:1px;
}
.bordertest:first-child:before {
    content:'';
    position:absolute;
    width:100%;
    height:30px;
    background:linear-gradient(to left, red, green);
    top:-30px;
    left:0;
}