JSFiddle - React, Tailwind, and code Playground

HTML

<div id="box">
    <ol>
        <li><img src="http://www.testigratis.com/wp-content/uploads/2010/10/stevevai.jpg" /></li>
        <li><img src="http://www.testigratis.com/wp-content/uploads/2010/10/stevevai.jpg" /></li>
    </ol>
</div>

CSS

#box {
    width: 500px;
    height: 500px;
    position: fixed;
    top: 0;
    left: 0;
    background-color: yellow;
    overflow-y: scroll;
}

li { float:left }