javascript: (function() {
  mapDiv = document.createElement("div");
  mapDiv.setAttribute("class", 'map');
  document.body.append(mapDiv);
  script = document.createElement("script");
  script.src = 'https://unpkg.com/mapclay@0.1.3/js/mapclay.js';
  script.type = 'module';
  document.body.append(script);
})();