I want to use declarative UI in a HTML file. But obviously my IDE (Netbeans 8.2) does not know about the Vaadin custom tags (like
vaadin-vertical-layout
). How can I use autocomplete for tags, attributes, etc in the NB HTML Editor ? Thanks.
Unfortunately there’s no easy way for that. You’d need a schema file at the very least, but implementing a proper schema is not easy, as the declarative syntax allows for add-ons. I’d recommend switching editors to Eclipse or Idea and using Vaadin Designer instead 
-Olli
Hi Olli,
thank you for answer. Yes, I was looking for a XML scheme. If there is no one, I will stay with pure Java.