JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <h3>Lorem ipsum dolor sit amet who made up this fake Latin text</h3>
</div>

CSS

div {
    width: 20em;
    border: 1px solid #000;
}
h3:first-line {
    background-color: yellow;
    width: 10em;
}