jQuery - Serialize Form with File inputs

gistfile1.js

(function($) {
  $.fn.serializeFiles = function() {
    var form = $(this),
        formData = new FormData()
        formParams = form.serializeArray();

    $.each(form.find('input[type="file"]'), function(i, tag) {
      $.each($(tag)[0].files, function(i, file) {
        formData.append(tag.name, file);
      });
    });

    $.each(formParams, function(i, val) {
      formData.append(val.name, val.value);
    });

    return formData;
  };
})(jQuery);