JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <div class="click">
        <div class="nadpis">...nadpis...</div>Normální text.</div>
</div>

CSS

.active {
    color: red;
}

JavaScript

var test = function () {
    "use strict";
    $(".click").hover(function () {
            $(this).children(".nadpis").addClass("active");
        }, function () {
            $(this).children(".nadpis").removeClass("active");
        }
    );
};

$(document).ready(test);