Hello:
vaadin am new to this, when one extends a component
which class should be used or AbstractComponent customComponent?
You question is a little unclear. When you want to make a class that is for example a view, then you can extend CustomComponent. CustomComponent is basically meant for grouping a set of components into one component. If you want to add features to an existing components, for example a ComboBox, then you extend ComboBox directly.
Thanks for your answer:lol: