JSFiddle - React, Tailwind, and code Playground

HTML

<div id="main" class="underline" >Hello</div>

CSS

#main{
    margin: 10px;
}

.underline{
    text-decoration: underline;
}

JavaScript

$('div').live('click', function(){
    $(this).toggleClass("underline")
    if ($(this).is(".underline")) {
        alert("added");
    } else {
        alert("removed");
    }
});