JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    The first row
</div>
<div>
    The <span class="boxed">second</span> row
</div>

CSS

* { box-sizing: border-box; }
div { border: 1px solid black; }
.boxed {
    background: light yellow;
    padding: 0.5em;
}