JSFiddle - React, Tailwind, and code Playground

HTML

<div class="x">I am X</div>
<div class="y">I am Y</div>
<div class="x y">I am Both</div>

CSS

div {
    display: inline-block;
    padding: 5px 8px;
    background-color: #ddd;    
}

JavaScript

$('.x').each(function() {
    this.onclick = function() {
        alert('X');   
    };
});$('.y').each(function() {
    this.onclick = function() {
        alert('Y');   
    };
});