}

        @Override
        public boolean onStartElement(String elementName, Map<String, String> attributes) {
            listener.warning(String.format("Unsupported HTML element <%s>", elementName));
            Element element = document.createElement("UNHANDLED-ELEMENT");
            element.appendChild(document.createTextNode(String.format("<%s>", elementName)));
            nodes.push(element);
            return true;
        }

        scanner.skip(WHITESPACE_WITH_EOL);
        scanner.mark();
        scanner.find(END_ELEMENT_NAME);
        String elementName = scanner.region().toLowerCase(Locale.ROOT);
        if (isEnd) {
            visitor.onEndHtmlElement(elementName);
        } else {
            visitor.onStartHtmlElement(elementName);
        }

        // attributes
        scanner.skip(WHITESPACE_WITH_EOL);

[].concat(...createdDocument.body.querySelectorAll('*'))\n\n  for (const element of elements) {\n    const elementName = element.nodeName.toLowerCase()\n\n    if (!Object.keys(allowList).includes(elementName)) {\n      element.remove()\n      continue\n    }\n\n    const attributeList = [].concat(...element.attributes)\n    const allowedAttributes = [].concat(allowList['*'] || [], allowList[elementName] || [])\n\n    for (const attribute of attributeList) {\n      if (!allowedAttribute(attribute, allowedAttributes))...