Copy Text To Clipboard When A Chrome Extension’s Browser Action Is Clicked

I want clicking my Chrome extension’s browser action button to copy some text, but the methods used on websites don’t work. (I realize there are some similar questions, however

Solution 1:

The textarea element should be added to the live DOM first e.g. to document.body and focused because execCommand operates on document.activeElement. You can hide the textarea so it doesn't flicker.

functioncopy(text) {
  const ta = document.createElement('textarea');
  ta.style.cssText = 'opacity:0; position:fixed; width:1px; height:1px; top:0; left:0;';
  ta.value = text;
  document.body.appendChild(ta);
  ta.focus();
  ta.select();
  document.execCommand('copy');
  ta.remove();
}

Might wanna set a few more CSS props to none or 0 like border/padding/margin just in case.