docs: function ($placeholder, files, that) {
  			var acceptedTypes = {
  				'image/png': true,
  				'image/jpeg': true,
  				'image/gif': true
  			};
  
  			for (var i = 0; i < files.length; i++) {
  				var file = files[i];
  
  				if (acceptedTypes[file.type] === true) {
  					$placeholder.append('<progress class="progress" min="0" max="100" value="0">0</progress>');
  
  					that.uploadFile($placeholder, file, that);
  				}
  			}
  		}