JSFiddle - React, Tailwind, and code Playground

HTML

<p>
    Select this text and then paste into the textarea below.
</p>
<textarea class="lame">SUNDAY SUNDAY SUNDAY AT THE MOTORCROSS ARENA!!!!</textarea>

<textarea></textarea>

CSS

.lame {
    z-index: -1;
    opacity: 0;
}

JavaScript

document.querySelector('p').addEventListener('mouseup', function(ev) {
  var test = document.querySelector('.lame');
  var bkp = test.value;
    
  test.select();
  document.execCommand('cut');
  test.value = bkp;
});