JavaScript copy to clipboard not working

Question

I have a function in my script that gives me an error. The function purpose is to copy text from static panel(not textbox or input) with onClick event.

Uncaught

Answer 1

Great answer by Intervalia.

Small improvement to it, sometimes the clicked element is not the one you want to copy.
So I suggest you pass the id of the element you want to copy.

 Copy 
 Text Sample 

And then, in the first line of your function do

element = document.getElementById(element); 

Not much of a difference but I think it's more useful this way.