JSFiddle - React, Tailwind, and code Playground

HTML

<div>1</div>
<div>2</div>
<div>3</div>
<div>4</div>

JavaScript

$('div').hover(function () {
    var self = $(this);
    var index = self.index();
    var html = this.innerHTML;
    self.html('eu sou a div ' + html + ' com index ' + index + ' e a div anterior tem html:' + self.prev().html());
}, function () {
    this.innerHTML = $(this).index() + 1;
});