JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://www.google.com/logos/2011/gregormendel11-hp.jpg"/>
<br/>
<img src="http://www.google.com/logos/2011/gregormendel11-hp.jpg" id="fluidimage"/>

JavaScript

$(document).ready(function() {
    var imageresize = 0.8;
    var $image = $("#fluidimage");
    $image.css({
        "width": Math.round($image.width() * imageresize),
        "height": Math.round($image.height() * imageresize)
    });
});