Copy content of element to clipboard.

copyToClipboard.js

function copyToClipboard(elWitchText) {
  if(navigator.clipboard) {
    // For newer web browser
    var value = elWitchText.value ? elWitchText.value : elWitchText.innerText;
    return navigator.clipboard.writeText(value)
  }
  else {
    // For older web browser (<2020)
    var tmp = document.createElement('textarea')
    tmp.value = elWitchText.value ? elWitchText.value : elWitchText.innerText;
    document.body.append(tmp);
    tmp.select();
    document.execCommand("copy");
    document.body.removeChild(tmp);
  }
}