JSFiddle - React, Tailwind, and code Playground

HTML

<aside>sidebar</aside>
<div class="content">
    <div class="one">One</div>
    <div class="two">Two</div>    
</div>

CSS

aside{
    float: left;
    background: orange;
    height: 300px;
    width: 100px;
}
.content{
    background: yellow;
    margin-left: 100px;
}
.one{
    height: 100px;
    background: purple;
}
.two{
    clear: both;
    background: green;
    height: 50px;
}