Starter code for a utility file

utils.js

// Encode: converts '<tags> & "quotes"' to "&lt;tags&gt; &amp; &quot;quotes&quot;"
function encodeHtmlEntitiesDOM(str) {
  const div = document.createElement('div');
  div.appendChild(document.createTextNode(str));
  return div.innerHTML;
}

// Decode: converts "&lt;tags&gt; &amp; &quot;quotes&quot;" back to '<tags> & "quotes"'
function decodeHtmlEntitiesDOM(str) {
  const textarea = document.createElement('textarea');
  textarea.innerHTML = String(str ?? '');
  return textarea.value;
}