Button to Copy submitted text?

Say you have a form that asks customers for their feedback/review. They submit, then on the confirmation page, you include the review they just wrote. You ask them to copy+paste and share on Google or Facebook reviews.

BUT… is there a way to make that submitted text copiable with a button? I am dealing with customers who tend to be a little older and actually might not be familiar with Ctrl+C.

I found some tips here – https://www.w3schools.com/howto/howto_js_copy_clipboard.asp – but this is for pre-set text, rather than variable text. So is there a way to make a customer’s submitted text very easily copiable?

This would be icing on the cake, but now I’m very curious. Thanks in advance!