JSFiddle - React, Tailwind, and code Playground

by brbcoding

HTML

<div class="foo" contenteditable></div>

CSS

.foo {
    position: relative;
    width: 150px;    
}

.foo:after {
    position: absolute;
    top: 1em;
    left: 0;
    content: "";
    width: 150px;
    height: 0;
    border-bottom: 1px solid #bada55;
}
.foo:before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.5em;
    height: 0.5em;
    width: 1px;
    background: #bada55;
}

.foo:focus {
    outline: solid transparent;
}