JSFiddle - React, Tailwind, and code Playground

by dystroy

HTML

<div id=a>AAA</div>
<div id=b>BBB</div>

CSS

#a{
    position: fixed;
    width:40%;
    top:0;
    left:0;
    height:400px;
    background-color:red;
}
#b{
    position: fixed;
    width:40%;
    top:0;
    right:0;
    height:400px;
    background-color:blue;
}

JavaScript

$('#a').click(function(){
    $('#b').animate({
    height: '50px'
  }, 5000);
});