It doesn't select the right loader if the file has dots

[iranreyes]

If the asset to preload has the format [filename](.[A-Z]*)*.[extension] then the loader pick up the generic one.

After some debug I found that the get extension method needs some improvements:

module.exports = function getExtension (url) {
  var ext;

  if (isBase64(url)) {
    var mime = base64Mime(url);
    ext = (mime.split('/'))[1];
  } else {
    ext = url.split('.').pop();
  }

  return ext || null;
};

[njam3]

Fixed as of preloader@4.0.2