JSFiddle - React, Tailwind, and code Playground

HTML

<aside>
      Aside
    </aside>
    <article>
      Article
    </article>

CSS

aside {
     float: right;
     width: 100px;
     background: blue;
     height: 200px;
    }

    article {
     margin-right: 100px;
     background: gray;
     height: 300px;
    }