JSFiddle - React, Tailwind, and code Playground

HTML

<img src='someimage.jpg'>
    <div id='output'></div>

CSS

img {
    border: 1px solid #333;
    height: 100px;
    width: 100px;
}

JavaScript

var imgBorderColor = $('img').css('border-color');
$('#output').html(imgBorderColor);