Use Vaadin widgets

I am learning how to create an hybrid application with Vaadin and I noticed that the Vaadin page, about the Vaadin widgets, is empty :

Is there another page or a tutorial about it ?


I don’t know why the site is empty but if you need an overlook of the Vaadin components with simple examples on how to use them you could look at the sampler:

What are the benefits and the disadvantages of create our own Vaadin widget ?