.innerHTML =
                          `<pre style="white-space: pre-wrap;">${JSON.stringify({
                            validXml: !xmlDoc.querySelector('parsererror'),
                            rootElement: xmlDoc.documentElement.nodeName,
                            childElements: Array.from(xmlDoc.documentElement.childNodes)
                              .filter(node => node.nodeType === 1)
                              .map(el => el.nodeName)
                          }, null, 2)}</pre>`;
          