Copy text from Αce editor to clipboard

Question

I am trying to copy the text from inside an Ace Editor box into my local clipboard, using the pure JS method described here. However, when I click my copy button, it will throw me an error:

"TypeError: copyTextarea.select is not a function"

and the text will not copy to my clipboard. Is there a way to do this somehow (either pure JS or jQuery)? My code is as follows (simplified but should be enough):

$('#clipboard').on('click', function() {
  var copyTextarea = document.querySelector('#result-box');
  copyTextarea.select();
  document.execCommand('copy');
});

<button id="clipboard">Copy</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="result-box" style="height: 100px; width: 100%; border-radius: 4px; border: 1px solid #DDD;">&lt;!DOCTYPE html&gt; 
  &lt;html&gt; 
  &lt;/html&gt;</div>
<script src="https://cdn.rawgit.com/ajaxorg/ace-builds/master/src-noconflict/ace.js" type="text/javascript" charset="utf-8"></script>
<script>
  var editor = ace.edit("result-box");
  editor.getSession().setMode("ace/mode/html");
  editor.setReadOnly(true);
  editor.setShowPrintMargin(false);
  editor.getSession().setUseWrapMode(true);
</script>

P.S.: There is another error thrown about some worker and whatnot concerning Ace, if anyone knows how to fix that, too, comment below. Thanks in advance!

Answer 1

call focus and selectAll on the editor, it works on most of modern browsers

$('#clipboard').on('click', function() {
  var sel = editor.selection.toJSON(); // save selection
  editor.selectAll();
  editor.focus();
  document.execCommand('copy');
  editor.selection.fromJSON(sel); // restore selection
});

<button id="clipboard">Copy</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="result-box" style="height: 100px; width: 100%; border-radius: 4px; border: 1px solid #DDD;">&lt;!DOCTYPE html&gt; 
  &lt;html&gt; 
  &lt;/html&gt;</div>
<script src="https://cdn.rawgit.com/ajaxorg/ace-builds/master/src-noconflict/ace.js" type="text/javascript" charset="utf-8"></script>
<script>
  var editor = ace.edit("result-box");
  editor.getSession().setMode("ace/mode/html");
  editor.setReadOnly(true);
  editor.setShowPrintMargin(false);
  editor.getSession().setUseWrapMode(true);
</script>