JSFiddle - React, Tailwind, and code Playground

HTML

<div class=test></div>

CSS

.test {
  border: 1px solid;
  width: 150px;
  height: 50px;
  background-color: orange;
}

JavaScript

$('.test').hover(
function(){
  $(this).html('<strong>Какой-то текст</strong>');
},
function(){
  $(this).html('');
});