Thanks for answer quincy,
I'm in Europe. Yes i'm talking about websites, but not a specific website.
I'm sorry for my English, i'm still learning.
I know Open Sources licenses about software ask to be compilant (including changes, copyright notice ecc...) when the software is "distributed".
I read that simply run on your website software like Javascript and Css it's considered "distribution".
Is it real? There is official documentation about it?
Thanks