JSFiddle - React, Tailwind, and code Playground

HTML

<div id="clicker">Clicker</div>
<br><br>
<div class="numbers">123456789</div>

JavaScript

$('.numbers').not('.less').on('click',function(){
    alert('should not alert if has class less after clicker');
});

$('#clicker').on('click',function(){
    $('.numbers').addClass('less');
});