title: Cannot use `document.execCommand('copy');` from developer console
body: <p>Calling <a href="https://developer.mozilla.org/en-US/docs/Web/API/Document/execCommand" rel="noreferrer">document.execCommand('copy');</a> from the Chrome developer console returns <code>false</code> every time.</p>
  
  <p>Give it a try yourself. Open the console and run it, it never succeeds.</p>
  
  <p>Any idea as to why?</p>
  
  <p><a href="https://i.stack.imgur.com/OqgeY.png" rel="noreferrer"><img src="https://i.stack.imgur.com/OqgeY.png" alt="enter image description here"></a></p>