Arbitrary click-to-copy links

[rachaelsalisbury]

Is your feature request related to a problem? Please describe.
I've just implemented the new copy code button on a private project documentation site and am loving the copy functionality. I wonder if it would be possible to extend the logic to copying other things to the clipboard? ie copying an email address to a clipboard, or even if someone didn't need to see the "code" copied. For example, my use case is sharing a Google App Scripts library ID—it's totally fine to have that ID in a code block with a copy code button, but no one really needs to see that ID before copying it.

Describe the solution you'd like
I am not a coder at all, so apologies for any "language barriers" here. Instead of a link button that would be formatted like:

[Click to open google](https://www.google.com/){: .btn}

something as easily customizable where clicking copies a stable string/code. I know this code wouldn't actually work since it's link formatting, but something as easy as:

[Click to copy](text to copy to clipboard){: .btn}

[mattxwang]

Hi @rachaelsalisbury,

Thank you for submitting an issue! Hm, this is certainly an interesting idea. From my perspective, the biggest difference would be the styling - I'd imagine that you'd want this to look more like an inline link, rather than the actual copy code button? With that in mind, I think we'd want to add a new CSS class that just makes a link "copyable", and allow users to combine it with other CSS classes to style the button itself. What do you think?

(happy to further explore this and push it upstream)