JSFiddle - React, Tailwind, and code Playground

HTML

<div class="left"><h3>Lorem</h3></div>
    <div class="right"><div class="line"></div></div>

CSS

.right {
    width:auto;
    overflow:hidden;
}
.left {
    height:200px;
    float:left;
}
h3{
  display:inline-block;
}
.line {
  display:inline-block;
  height:2px;
  width:100%;
  background:red;
}