I am doing a Safari extension and would like it to copy something to the user clipboard. Unfortunately, all the sources I find speak of cross-platform solutions with Flash or contain vague references to execCommand.
Is there a way to do this in Safari with JavaScript?
No, sorry. There's nothing here. You can submit a feature request to Apple's error reporter if that means anything to you. Maybe if we are enough people who ask for it, they will finally do it.