How to dispatch action client side only?

I need to call some specific actions on my client side only. Specifically I need to make some ajax calls only on client side page load. I also need to call a deserialize function to convert the loaded server data into some class based data objects.

It seems like when using the decorator `@connectData( fetchData, fetchDataDeferred )` neither function is called on the server side on first page load.

The Widgets page mentions "This uses the static method `fetchDataDeferred`" but that method isn't real.