JSFiddle - React, Tailwind, and code Playground
HTML
<h2><span>THIS IS A TEST</span></h2>
<p>this is some content</p>CSS
h2 { width:100%; text-align:center; border-bottom: 1px solid #000; line-height:0.1em; margin:10px 0 20px; }
h2 span { background:#fff; padding:0 10px; }