JSFiddle - React, Tailwind, and code Playground

HTML

<aside class="span4">

	<textarea cols="40" rows="20"></textarea>
	
</aside>

CSS

textarea {
			width: 100%;
			margin:0;
			padding:0;
            border: none;

		}

		.span4 {
			width: 300px;
			
		}

		aside {
			overflow: auto;
		}