JSFiddle - React, Tailwind, and code Playground

HTML

<h2>Title</h2>

<h2>A long long Title</h2>

CSS

h2 {
  background-color: yellow;
  position: relative;
  overflow: hidden;
  padding-left: 2.5em;
}

h2:before {
  content: "";
  position: absolute;
  width: 2em;
  top: 51%;
  left: 0;
  display: inline-block;
  border-bottom: 1px solid;
}

h2:after {
  content: "";
  position: absolute;
  width: 100%;
  top: 51%;
  margin-left: 0.5em;
  display: inline-block;
  border-bottom: 1px solid;
}