JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery-1.8.3.js"></script>
<link href="http://code.jquery.com/ui/1.9.1/themes/base/jquery-ui.css" rel="stylesheet" />
<script src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>

<div id="content">
    <div id="parent">
        <div id="child"></div>
    </div>
</div>

CSS

#content {
    position:relative;
    width:400px;
    height:400px;
    margin-left:30px;
    
    border:1px solid grey;
}
#parent {
    position:relative;
    border: 1px solid blue;
    width: 300px;
    height: 300px;
}
#child {
    position:relative;
    border: 1px solid green;
    width: 100px;
    height: 100px;
}

JavaScript

$('#child').resizable({ containment:"#content" });