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              <!-- NOTES: Ever since the realse of Chrome38, the img & srcset solution for picturefill.js has been busted for that browser.  This demo will work if being viewed in Firefox tho -->

<!-- Put the smallest img first in srcset because it is going to load that image regardless.  Or you could put a super small image. -->
<img id="bearIMG"
 srcset="https://i.imgur.com/u9PaEmr.jpg 320w,
   https://i.imgur.com/ABXCODX.png 600w,  
         https://i.imgur.com/uzvVYQL.jpg 900w"
     sizes="(min-resolution: 2dppx) 50%, 100%"
     alt="How about dem bears?"
   src="https://i.imgur.com/V4ruZ1O.jpg" >

<!-- sizes="(min-width: 500px) 50%, 100%" -->
              * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;

body {
  padding-top: 20px;

article {
  margin: 0 auto;
  max-width: 1000px;
  text-align: center;

article img {
  max-width: 70%;

.vw-line {
  text-align: center;
    margin-bottom: 1em;

body{ background-color: #14191C;}
p {
  color: #E5D2B6;
  text-shadow: 2px 2px 1px #000;
  font-size: 20px;
  font-family: sans-serif;
  padding:3px 0;

(min-resolution: 2dppx){
              $("<div />", {
  class: 'vw-line',
  html: "<p>IMG Width: <span id='imgw'></span>px</p>"

$("<div />", {
  class: 'vw-line',
  html: "<p>Viewport Width: <span id='vw'></span>px</p>"

var vwDisplay = $("#vw");
var imgwDisplay = $("#imgw");
$(window).on("resize", function() {

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