JSFiddle - React, Tailwind, and code Playground

HTML

<div id="sidebar">
 <img src="http://farm9.staticflickr.com/8075/8449869813_1e62a60f01_b.jpg" />
</div>
<p>hello world</p>

CSS

#sidebar { 
    width: 40%;
}
img { 
    width: 100%;
}