Ghost 4 - Remove “Publish with Ghost” button on portal

gistfile1.txt

/**
 * Add this to site footer codeinjection
 */

// <script>
window.onload = () => {
  let observer;
  const targetNode = document.getElementById('ghost-portal-root');

  observer = new MutationObserver((mutations) => {
    mutations.forEach(({ addedNodes }) => {
      Array.from(addedNodes)
        .map(({ firstChild }) => firstChild)
        .filter((node) => {
          const found =
            node &&
            node.nodeName === 'IFRAME' &&
            node.title == 'portal-popup';
          return found;
        })
        .forEach((node) => {
          node.onload = () => {
            const { contentDocument } = node;
            const styleElm = document.createElement('style');
            styleElm.type = 'text/css';
            contentDocument.head.appendChild(styleElm);
            styleElm.sheet.insertRule(
              '.gh-portal-powered { display: none}',
              0
            );
            observer.takeRecords();
          };
        });
    });
  });

  observer.observe(targetNode, { childList: true, subtree: false });
};
// </script>