radio.shim.js

(function(root, factory) {
  if (typeof define === 'function' && define.amd) {
    define(['backbone.marionette', 'backbone.radio', 'underscore'], factory);
  } else if (typeof exports !== 'undefined') {
    module.exports = factory(require('backbone.marionette'), require('backbone.radio'), require('underscore'));
  } else {
    factory(root.Backbone.Marionette, root.Backbone.Radio, root._);
  }
}(this, function(Marionette, Radio, _) {
  'use strict';

  Marionette.Application.prototype._initChannel = function () {
    this.channelName = _.result(this, 'channelName') || 'global';
    this.channel = _.result(this, 'channel') || Radio.channel(this.channelName);
  }
}));

@thejameskyle is there any downside to using marionette instead of backbone.marionette in the define (since I like to use marionette in my RequireJS config)?

define(['marionette', 'backbone.radio', 'underscore'], factory);

@matiux (With Webpack) just import it. import 'lib/radio.shim.js';