Using ScrollMagic as an AMD module or shim

[gabriel-amram]

Hello,
Is there a way to use the ScrollMagic plugin as an AMD module?
I see it defines two variables in the window level :
window.ScrollScene = ScrollScene;
window.ScrollMagic = ScrollMagic;

but using it with requirejs requires these to be defined otherwise.

Using requirejs shim syntax doesn't work because ScrollMagic exports 2 variables as far as I know. Is there a way to use ScrollMagic as an AMD module?

[janpaepke]

Without knowing too much about AMD it should go something like this:

define('ScrollMagic', ['ScrollScene'], function (ScrollScene) {
    return window.ScrollMagic;
});
define('ScrollScene', ['ScrollMagic'], function (ScrollMagic) {
    return window.ScrollScene;
});

I dunno - that's just a guess.
Feel free to figure it out and let me know.

[gabriel-amram]

Hey, Thanks for the reply!
The problem with that approach as far as I know is that it makes me load jQuery, TweenMax and ScrollMagic outside of the requirejs loop.

Instead, I asked that question on StackOverflow and answered myself:
http://stackoverflow.com/questions/25867893/using-scrollmagic-js-as-amd-module

I forked the repo and hope to send you a pull request with full support for AMD modules soon (including module.exports for node hopefully).

Thanks again for the reply and that wonderful plugin!

[janpaepke]

All right, I'll leave this open for now. :)
Thanks for investigating this!

[krnlde]

Here is my scrollmagic require config:

;(function (window) {
  "use strict";
  require.config({
    waitSeconds: 360,
    baseUrl: '/tour/js/',
    paths: {
      when: 'lib/vendor/cujojs/when',
      TweenMax: 'lib/vendor/TweenMax.min'
    },
    shim: {
      IScroll: {
        exports: 'IScroll'
      },
      ScrollMagic: {
        deps: ['lib/vendor/jquery.scrollmagic.min', 'lib/vendor/animationFrame'],
        exports: 'ScrollMagic',
        init: function() {
          var instance;
          return {
            ScrollMagic: ScrollMagic,
            ScrollScene: ScrollScene,
            controller: function () {
              return instance || (instance = new ScrollMagic());
            }
          };
        }
      }
    }
  });
  require(['app']);
}(window));

Require ScrollMagic in your module like so:

require(['ScrollMagic', 'TweenMax', 'IScroll'], function (S, TweenMax, IScroll) {
  var controller = new ScrollMagic();
  // you can call "new ScrollMagic();" because it's a global variable.
});

There might be some improvement involved with this, since ScrollMagic is a global variable. Preferably extend it with the UMD pattern: https://github.com/umdjs/umd . Any thoughts Jan?

[janpaepke]

I will have to look into this some more.
So far I haven't really used require.js or the like.
Although I do understand the advantages...
I'll look into it...

[janpaepke]

ScrollMagic now uses the UMD pattern. It can be used as a browser global or defined with the AMD pattern.
Here's the code I used to get requirejs to load it:

require.config({
    baseUrl: '../ScrollMagic/js',
    paths: {
        TweenMax: '_dependent/greensock/TweenMax.min',
        TimelineMax: '_dependent/greensock/TweenMax.min',
        ScrollMagic: 'jquery.scrollmagic',
        ScrollScene: 'jquery.scrollmagic',
        "ScrollMagic.debug": 'jquery.scrollmagic.debug',
        jquery: '_dependent/jquery.min'
    }
});

require(['jquery', 'ScrollMagic', 'ScrollScene', 'ScrollMagic.debug'], function( $, ScrollMagic, ScrollScene, debug) {
    // do stuff
});

Have fun! :)

[krnlde]

Dear good Sir. You. Are. Awesome.

[janpaepke]

Haha - you're the one that made me learn about it.
I didn't have a clue about UMD and AMD, now I do and I understand them and see their value.

So thank you for that. :)

If you have tested it out I'd love some feedback that it works for you as well.
Just to make sure...

[krnlde]

Seems to work great at a first glance. I only find it a bit annoying that ScrollMagic is now begging for jQuery as a require-module, which is (together with require.js itself) the only module I load synchronously.
But I know there is already a TODO which will remove these kinda dependencies so no offense!

In the meantime my solution will be the following, suggested by this saviour:

define('jquery', function() {
    return jQuery;
});

[janpaepke]

Actually there's also an even bigger TODO on my list which is to remove the jQuery dependency all together.
It's actually only in there for convenience reasons but not out of necessity.
So stay tuned for a module version of ScrollMagic, where both jQuery and possibly TweenMax are optional additional AddOns to the core functionality.

[krnlde]

As of ScrollMagic v1.3.0 the behavior for require.js has changed a bit. You only need to load ScrollMagic as a single module which'll itself provide the ScrollMagic Controller and Scene Constructors.

Here's an example

require.config({
    baseUrl: '../ScrollMagic/js',
    paths: {
        TweenMax: '_dependent/greensock/TweenMax.min',
        TimelineMax: '_dependent/greensock/TweenMax.min',
        ScrollMagic: 'jquery.scrollmagic',
        jquery: '_dependent/jquery.min'
    }
});

require(['ScrollMagic'], function (ScrollMagic) {
    var controller = new ScrollMagic.Controller(/*...*/);
    var scene = new ScrollMagic.Scene(/*...*/);
});

Further information are described here: https://github.com/janpaepke/ScrollMagic/wiki/Getting-Started-:-Using-AMD