JSFiddle - React, Tailwind, and code Playground

HTML

<div id="content">
    <div class="sidebar">1</div><!--
    --><div class="sidebar">2</div>
</div>

CSS

#content {
    padding:0;
    margin:0;
}


.sidebar {
    width: 50%;
    display: inline-block;
    margin: 0;
    padding: 0;
}