JSFiddle - React, Tailwind, and code Playground

HTML

<div class="window">
    <div class="rect"></div>
</div>

CSS

.window
{
    width: 640px;
    height: 480px;
    background: gray;
    position: absolute;
    -webkit-transform: translate(-25%, -25%) scale(0.5);
}

.rect
{
    width: 60px;
    height: 40px;
    background: red;
}

JavaScript

$(function() {
    $('.rect').draggable({
        containment: 'parent'
    });
});