JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div><img src="http://placehold.it/100x100/fcc"/></div>
    <div><img src="http://placehold.it/100x100/ccf"/></div>
</div>

CSS

body {width:501px; background:black;}
.wrapper{width:100%; display:table; position:relative;}
.wrapper:after {content:""; position:absolute; bottom:0; left:0; height:1px; width:100%; background:black;}
.wrapper div {display:table-cell; vertical-align:top;}
img {display: block; width:100%;}