JSFiddle - React, Tailwind, and code Playground

HTML

<div class="block"></div>
<div id="block"></div>

CSS

#block, .block
{
    position: absolute;
    height: 128px;
    width: 128px;
    background: #ccc;
}

.block
{
 
    background: #666;
}

JavaScript

$('#block, .block').each(function(){
    $(this).click(function(n){
        if(n = 1){
            $('#block').animate({'width':'0'}, 1000);
        } else {
            alert();
        }
    });
});