JSFiddle - React, Tailwind, and code Playground

HTML

<div><span>Do you have an idea to add a background-color property on a multi-line text, with two difficulties:</span></div>

CSS

span {
color: white;
background-color: #343132;
box-shadow: 0.5em 0 0 #343132,-0.5em 0 0 #343132;
}
div {width: 100px;}