JSFiddle - React, Tailwind, and code Playground

HTML

<div class="ativo3 and many other classes"></div>
<div class="another classes here with ativo1"></div>
<div class="here ativo9 and more two or three"></div>

CSS

div {
    background-color: #ddd;
    height: 50px;
    width: 50px;
    display: inline-block;
    margin: 10px;
    cursor: pointer;
}

JavaScript

$("div[class^='ativo']").on("click", function(){
    $(this).removeClass("^='ativo'");
});