Detect backendlayout in Neos and reload page

backend.js

(function () {
  /**
   * Backend specific scripts
   */
  "use strict";

  var lastPageLayout,
      layouts = {
        newsletter: 'typo3:Vendor.Package:Newsletter'
      };

  // Reload page on layout change
  function verifyPageLayout () {
    var pageMeta = document.getElementById('neos-document-metadata'),
        currentLayout = pageMeta.getAttribute('typeof'),
        currentLayoutIsNewsletter = currentLayout == layouts.newsletter;

    // Reload page if layout has changed
    if ((lastPageLayout == layouts.newsletter && !currentLayoutIsNewsletter) || (lastPageLayout != layouts.newsletter && lastPageLayout !== undefined && currentLayoutIsNewsletter)) {
      location.reload();
    }
    lastPageLayout = currentLayout;
  }

  verifyPageLayout();

  // Load scripts for certain events
  if (typeof document.addEventListener === 'function') {
    document.addEventListener('Neos.PageLoaded', function(event) {
      // Reload google maps after a page has loaded
      verifyPageLayout();
    }, false);
  }
})();