how to use the access element?

Hi: I don't known how to use widget access request policy, is any examples for it, thanks. best my regards!

can we extend some html file as resource in a widget?

hello: can we extend some html file as resource in a widget? if can, how to load the extention html file from the start.html. btw,what languages we used for ui markup? html+css? if use the html, how deal with the a tag of html. thanks. best regards!