JSFiddle - React, Tailwind, and code Playground

HTML

<div class="x">
    Passe o mouse aqui :)
</div>

CSS

.x{
    background-color:lightgreen;
}

JavaScript

$(function(){
    
    $('.x').on('mouseenter', function (){
       $(this).html('mouse entrou');
    }).on('mouseleave', function (){
          $(this).html('mouse saiu');
    });
    
});