Frovo play button converter to link

frovo-link.user.js

// ==UserScript==
// @name           Frovo mp3 link extractor
// @description    It convers the play button to link, to be able to copy directly playable link of the mp3
// @include        https://forvo.com/*
// @version        1.0
// @run_at: "document-end"
// ==/UserScript==

const PlayRegEx = /Play\(\d+,'([a-zA-Z0-9=]+)'/;
const PlayPhraseRegEx = /PlayPhrase\(\d+,'([a-zA-Z0-9=]+)'/;

function getMP3UrlFromNode(node, regex, prefix) {
  const match = regex.exec(node.onclick);
  if (match === null) return null;

  const urlBase64 = match[1];
  return prefix + atob(urlBase64);
}

function createLinkElementFromNode(node, url) {
  const a = document.createElement('a');

  a.href = window.location.origin + url;
  a.onclick = node.onclick;
  a.innerHTML = node.innerHTML;
  a.classList = "play icon-size-xl";

  return a;
}

(function () {
  'use strict';
  document.querySelectorAll('span.play').forEach(node => {
    const url = getMP3UrlFromNode(node, PlayRegEx, '/mp3/') || getMP3UrlFromNode(node, PlayPhraseRegEx, '/phrases/mp3/');
    if (url === null) return;

    const aElement = createLinkElementFromNode(node, url);
    node.parentElement.replaceChild(aElement, node);
  });
})();