code: function keyboardOrientationChange() {
    //console.log("orientationchange fired at: " + Date.now());
    //console.log("orientation was: " + (ionic.keyboard.isLandscape ? "landscape" : "portrait"));
  
    // toggle orientation
    ionic.keyboard.isLandscape = !ionic.keyboard.isLandscape;
    // //console.log("now orientation is: " + (ionic.keyboard.isLandscape ? "landscape" : "portrait"));
  
    // no need to wait for resizing on iOS, and orientationchange always fires
    // after the keyboard has opened, so it doesn't matter if it's open or not
    if (ionic.Platform.isIOS()) {
      keyboardUpdateViewportHeight();
    }
  
    // On Android, if the keyboard isn't open or we aren't using the keyboard
    // plugin, update the viewport height once everything has resized. If the
    // keyboard is open and we are using the keyboard plugin do nothing and let
    // nativeShow handle it using an accurate keyboard height.
    if ( ionic.Platform.isAndroid()) {
      if (!ionic.keyboard.isOpen || !keyboardHasPlugin()) {
        keyboardWaitForResize(keyboardUpdateViewportHeight, false);
      } else {
        wasOrientationChange = true;
      }
    }
  }
docs: Event handler for 'orientationchange' events. If using the keyboard plugin
  and the keyboard is open on Android, sets wasOrientationChange to true so
  nativeShow can update the viewport height with an accurate keyboard height.
  If the keyboard isn't open or keyboard plugin isn't being used,
  waits for the window to resize before updating the viewport height.
  
  On iOS, where orientationchange fires after the keyboard has already shown,
  updates the viewport immediately, regardless of if the keyboard is already
  open.