How to apply retina.js only to .png files?

[bisonbrah]

I'm only using retina.js for png image types. How would I only trigger retina.js to check for @2x for only png? I have a ton of jpeg and the console error codes are driving me nuts >.<.

Thanks in advance for the assistance!

[christoshrousis]

Add an attribute to your html markup data-no-retina or if there's too many

Replace the following lines:
https://github.com/imulus/retinajs/blob/master/src/retina.js#L38-L46

with SOMETHING like this:

for (i = 0; i < images.length; i += 1) {
  image = images[i];
  if (image.src) {
    var imageSource = image.src,
    imageExt    = imageSource.substr(imageSource.lastIndexOf('.') + 1);

    if (!!!image.getAttributeNode('data-no-retina') && imageExt == 'png ') { 
        retinaImages.push(new RetinaImage(image));
    }
  }
}

Stolen from here:
https://github.com/jeremymouton/retinajs/blob/master/src/retina.js#L52-L63