JSFiddle - React, Tailwind, and code Playground

by Denis Ineshin

HTML

<button id="btn">
    Кнопка
</button>

CSS

#btn {
    border: 2px solid #fff;
    outline: none;
    font-size: 20px;
}
#btn.active {
    border-color: #f00;
}

JavaScript

$("#btn").on("click", function () {
	$(this).toggleClass("active");
});