Summary

We've learned some key aspects of Vaadin client side development. Take a look at the cool things we did:

• We learned how to implement custom components using object-oriented composition.

• We saw that Java is compiled into JavaScript by the Vaadin client side compiler.

• We learned that a Widget is a client side component and the Vaadin client side compiler generates it as JavaScript.

• We learned that a Widget can be paired with a server side UI component by implementing a Connector interface annotated with @Connect.

• We learned how to make remote procedure calls from a client-side widget to a server-side component.

• We learned how to implement Vaadin extensions by extending AbstractExtension.

• We learned how to call JavaScript from the server and how to call the server from JavaScript.

• We learned how to implement JavaScript extensions by extending AbstractJavaScriptExtension and annotating the class with @JavaScript.

It was an awesome trip! We didn't see every aspect of Vaadin; but we now are able...