JSFiddle - React, Tailwind, and code Playground

by lollero

HTML

<div class="A"></div>
<div class="B"></div>

CSS

div { 
    float: left;
    width: 10px;
    height: 10px;
    background: #333;
}

.B { height: 40px; }

JavaScript

var height = jQuery('div.B').height();

alert( 'height: ' + height + 'px' );
// console.log( 'height: ' + height + 'px' );

jQuery('div.A').animate({
    'marginTop': height
}, 500 );