Quick function to copy an element's text to the clipboard.

copyToClipboard.js

function copyToClipboard(element) {
  if (element.select) {
    element.select();
    document.execCommand('copy');
  } else {
    let range = document.createRange();
    range.selectNodeContents(outputText);
    let selection = window.getSelection();
    selection.removeAllRanges();
    selection.addRange(range);
    document.execCommand('copy');
    selection.removeAllRanges();
  }
}