JSFiddle - React, Tailwind, and code Playground

HTML

<div class="list-item list-item-active">
    <div class="close">x</div>
</div>

CSS

.list-item {width:100px;height:100px;background:#fff}
.list-item-active {background:#ccc}

JavaScript

$(document).ready(function(){
    $('.list-item').live('click', function() {
        if (!$(this).hasClass('list-item-active'))
            $(this).addClass('list-item-active');
    });
    $('.list-item .close').live('click', function() {
        $(this).parent().removeClass('list-item-active');
    });
});