User JS read out by webpage JS

Currently I add some functionality to webpages via UserJS in Opera. I w开发者_如何学Cas wondering if the webpage designer could see what javascript actions I'm doing in my UserJS on his webpage (e.g. via javascript)?

Is this possible? I think it doesn't because the UserJS gets executed first and isn't really 'added' to the page. I'd like to be sure, hence the question.

No, it's not possible. user.js scripts are local and only executed on the system.

If you want your web designer to have the same function, you'd need to send them your script files and have them use Opera.