My Orientation Change polyfill module

Orientation.js

var OrientationManager = (function () {
    "use strict";

    var supportsOrientationChange = window.hasOwnProperty("onorientationchange")
      , orientationEvent = supportsOrientationChange ? "orientationchange" : "resize"
      , currentOrientation = window.orientation || 0
      , currentWidth = window.outerWidth;

    function orientationChanged(callBack) {
      var newWidth = window.outerWidth
        , newOrientation = window.orientation || (newWidth !== currentWidth) ? 1 : 0;

      // only change orientation and call provided callback if necessary
      if (newOrientation !== currentOrientation) {
          currentOrientation = newOrientation;
          currentWidth = newWidth;
          if (callBack) { callBack(); }
      }
    }

    // exports
    return {
        supportsOrientationChange: supportsOrientationChange
        , orientation: currentOrientation
        , orientationEvent: orientationEvent
        , orientationChanged: orientationChanged
    };
} ());

// jQuery binding usecase
$(function($){	
    $(window).on(orientationEvent, function (){OrientationManager.orientationChanged(myCallback);});
});

I created a repo under orientation-change-polyfill.
🍺 Feel free to contribute.