JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/mobile/1.0/jquery.mobile-1.0.min.js"></script>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.0/jquery.mobile-1.0.min.css">
<div data-role="page" id="testPage">
    <div data-role="content">    
        <nav id="mainNavigation">
            Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />
            Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />
            Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />
            Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />
            Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />Menu Option<br />
        </nav>                
                
        <p>Page content goes here.</p>        
    </div>
</div>

CSS

body { position: relative; }

#mainNavigation {
    top: 102px;
    z-index: 1;
    width: 150px;
    bottom: 230px;
    overflow-y: auto;
    position: absolute;
}

#testPage { height: 200%; }