autoSubmitterHandler.ender.js

(function ($) {


  function autoSubmitHandler ($input, $button) {
    var self = this;
    this.$input = this;
    this.$button = $button;

    this.$input.on('keydown', function (e) { self.handleInputKeydown(e); });
    this.$input.on('blur', function (e) { self.handleInputBlur(e); });
    return this;
  }

  autoSubmitHandler.prototype = {

    isEmpty: function () {
      return this.$input.val() == '' || this.$input.val() === this.$input.attr('placeholder');
    },

    handleInputKeydown: function(e) {
      this.$button.removeAttr('disabled');
      if (e.keyCode === 13 && this.isEmpty()) {
        e.stop();
        return false;
      }
    },

    handleInputBlur: function () {
      if (!this.isEmpty()) return false;

      this.$button.attr('disabled', 'disabled');
    }
  };


  $.ender({
    autoSubmitHandler: function (options) {
      return this.forEach(function (el) {
        // something like this
        $(el).data('autoSubmitHandler', new autoSubmitHandler(this, options.button));
      });
    }
  }, true);

})(window.ender);

And then it would be called with $.autoSubmitHandler('#inputName', '#buttonName')?

$('input.handleThatSubmitButtonLikeAChamp').autoSubmitHandler({ button: '#theButton' });