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

        // attributes
        scanner.skip(WHITESPACE_WITH_EOL);
        while (!scanner.isEmpty() && scanner.lookingAt(ELEMENT_ATTRIBUTE)) {
            // attribute name

            elementHandlers.add(handler);
        }

        public void add(JavadocTagHandler handler) {
            tagHandlers.add(handler);
        }

        @Override
        void onStartHtmlElement(String name) {
            attributes.clear();
        }

        @Override
        void onHtmlElementAttribute(String name, String value) {
            attributes.put(name, value);
        }