JSFiddle - React, Tailwind, and code Playground

HTML

<div class="left">Colum1</div>
<div class="right">Colum2</div>

CSS

body {
    margin:0;     
    height:100vh; 
    width:100vw;  
}

div {
    height:100vh;
    width:50vw;
}

.left {
    background:#673;
    float:left;
}

.right {
    background:#897;
    float:right;
}