/*
    * Copyright (c) 2002-2025 Gargoyle Software Inc.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    * https://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.htmlunit.javascript.host.dom;
  
  import static org.htmlunit.BrowserVersionFeatures.EVENT_ONANIMATION_DOCUMENT_CREATE_NOT_SUPPORTED;
  import static org.htmlunit.BrowserVersionFeatures.EVENT_ONCLOSE_DOCUMENT_CREATE_NOT_SUPPORTED;
  import static org.htmlunit.BrowserVersionFeatures.EVENT_ONPOPSTATE_DOCUMENT_CREATE_NOT_SUPPORTED;
  import static org.htmlunit.BrowserVersionFeatures.EVENT_TYPE_MUTATIONEVENT;
  import static org.htmlunit.BrowserVersionFeatures.EVENT_TYPE_TEXTEVENT;
  import static org.htmlunit.BrowserVersionFeatures.EVENT_TYPE_WHEELEVENT;
  import static org.htmlunit.BrowserVersionFeatures.HTMLDOCUMENT_COOKIES_IGNORE_BLANK;
  import static org.htmlunit.BrowserVersionFeatures.JS_DOCUMENT_EVALUATE_RECREATES_RESULT;
  import static org.htmlunit.BrowserVersionFeatures.JS_DOCUMENT_SELECTION_RANGE_COUNT;
  import static org.htmlunit.javascript.configuration.SupportedBrowser.CHROME;
  import static org.htmlunit.javascript.configuration.SupportedBrowser.EDGE;
  import static org.htmlunit.javascript.configuration.SupportedBrowser.FF;
  import static org.htmlunit.javascript.configuration.SupportedBrowser.FF_ESR;
  
  import java.io.IOException;
  import java.io.Serializable;
  import java.lang.reflect.InvocationTargetException;
  import java.net.URL;
  import java.time.ZoneId;
  import java.time.format.DateTimeFormatter;
  import java.util.Collections;
  import java.util.Date;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Locale;
  import java.util.Map;
  import java.util.Set;
  import java.util.UUID;
  import java.util.function.Predicate;
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.htmlunit.HttpHeader;
  import org.htmlunit.Page;
  import org.htmlunit.SgmlPage;
  import org.htmlunit.WebClient;
  import org.htmlunit.WebResponse;
  import org.htmlunit.WebWindow;
  import org.htmlunit.corejs.javascript.Callable;
  import org.htmlunit.corejs.javascript.Context;
  import org.htmlunit.corejs.javascript.Function;
  import org.htmlunit.corejs.javascript.NativeFunction;
  import org.htmlunit.corejs.javascript.Scriptable;
  import org.htmlunit.corejs.javascript.ScriptableObject;
  import org.htmlunit.cssparser.parser.CSSException;
  import org.htmlunit.html.DomComment;
  import org.htmlunit.html.DomDocumentFragment;
  import org.htmlunit.html.DomElement;
  import org.htmlunit.html.DomNode;
  import org.htmlunit.html.DomText;
  import org.htmlunit.html.FrameWindow;
  import org.htmlunit.html.Html;
  import org.htmlunit.html.HtmlAnchor;
  import org.htmlunit.html.HtmlArea;
  import org.htmlunit.html.HtmlAttributeChangeEvent;
  import org.htmlunit.html.HtmlElement;
  import org.htmlunit.html.HtmlEmbed;
  import org.htmlunit.html.HtmlForm;
  import org.htmlunit.html.HtmlFrameSet;
  import org.htmlunit.html.HtmlImage;
  import org.htmlunit.html.HtmlPage;
  import org.htmlunit.html.HtmlRb;
  import org.htmlunit.html.HtmlRp;
  import org.htmlunit.html.HtmlRt;
  import org.htmlunit.html.HtmlRtc;
  import org.htmlunit.html.HtmlScript;
  import org.htmlunit.html.HtmlSvg;
  import org.htmlunit.html.HtmlUnknownElement;
  import org.htmlunit.html.UnknownElementFactory;
  import org.htmlunit.html.impl.SimpleRange;
  import org.htmlunit.http.HttpUtils;
  import org.htmlunit.httpclient.HtmlUnitBrowserCompatCookieSpec;
  import org.htmlunit.javascript.HtmlUnitScriptable;
  import org.htmlunit.javascript.JavaScriptEngine;
  import org.htmlunit.javascript.configuration.JsxClass;
  import org.htmlunit.javascript.configuration.JsxConstructor;
  import org.htmlunit.javascript.configuration.JsxFunction;
  import org.htmlunit.javascript.configuration.JsxGetter;
  import org.htmlunit.javascript.configuration.JsxSetter;
  import org.htmlunit.javascript.host.Element;
  import org.htmlunit.javascript.host.FontFaceSet;
  import org.htmlunit.javascript.host.Location;
 import org.htmlunit.javascript.host.NativeFunctionPrefixResolver;
 import org.htmlunit.javascript.host.Window;
 import org.htmlunit.javascript.host.animations.AnimationEvent;
 import org.htmlunit.javascript.host.css.StyleSheetList;
 import org.htmlunit.javascript.host.dom.AbstractList.EffectOnCache;
 import org.htmlunit.javascript.host.event.BeforeUnloadEvent;
 import org.htmlunit.javascript.host.event.CloseEvent;
 import org.htmlunit.javascript.host.event.CompositionEvent;
 import org.htmlunit.javascript.host.event.CustomEvent;
 import org.htmlunit.javascript.host.event.DragEvent;
 import org.htmlunit.javascript.host.event.Event;
 import org.htmlunit.javascript.host.event.FocusEvent;
 import org.htmlunit.javascript.host.event.HashChangeEvent;
 import org.htmlunit.javascript.host.event.KeyboardEvent;
 import org.htmlunit.javascript.host.event.MessageEvent;
 import org.htmlunit.javascript.host.event.MouseEvent;
 import org.htmlunit.javascript.host.event.MutationEvent;
 import org.htmlunit.javascript.host.event.PointerEvent;
 import org.htmlunit.javascript.host.event.PopStateEvent;
 import org.htmlunit.javascript.host.event.ProgressEvent;
 import org.htmlunit.javascript.host.event.TextEvent;
 import org.htmlunit.javascript.host.event.UIEvent;
 import org.htmlunit.javascript.host.event.WheelEvent;
 import org.htmlunit.javascript.host.file.Blob;
 import org.htmlunit.javascript.host.html.HTMLAllCollection;
 import org.htmlunit.javascript.host.html.HTMLBodyElement;
 import org.htmlunit.javascript.host.html.HTMLCollection;
 import org.htmlunit.javascript.host.html.HTMLElement;
 import org.htmlunit.javascript.host.html.HTMLFrameSetElement;
 import org.htmlunit.util.Cookie;
 import org.htmlunit.util.UrlUtils;
 import org.htmlunit.xpath.xml.utils.PrefixResolver;
 import org.w3c.dom.CDATASection;
 import org.w3c.dom.DOMException;
 import org.w3c.dom.DocumentType;
 import org.w3c.dom.ProcessingInstruction;
 
 /**
  * A JavaScript object for {@code Document}.
  *
  * @author <a href="mailto:mbowler@GargoyleSoftware.com">Mike Bowler</a>
  * @author David K. Taylor
  * @author <a href="mailto:chen_jun@users.sourceforge.net">Chen Jun</a>
  * @author <a href="mailto:cse@dynabean.de">Christian Sell</a>
  * @author Chris Erskine
  * @author Marc Guillemot
  * @author Daniel Gredler
  * @author Michael Ottati
  * @author <a href="mailto:george@murnock.com">George Murnock</a>
  * @author Ahmed Ashour
  * @author Rob Di Marco
  * @author Ronald Brill
  * @author Chuck Dumont
  * @author Frank Danek
  * @author Madis Pärn
  * @author Lai Quang Duong
  * @author Sven Strickroth
  *
  * @see <a href="http://msdn.microsoft.com/en-us/library/ms531073.aspx">MSDN documentation</a>
  * @see <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-html.html#ID-7068919">W3C Dom Level 1</a>
  */
 @JsxClass
 public class Document extends Node {
 
     private static final Log LOG = LogFactory.getLog(Document.class);
 
     /** https://developer.mozilla.org/en/Rich-Text_Editing_in_Mozilla#Executing_Commands */
     private static final Set<String> EXECUTE_CMDS_FF = new HashSet<>();
     private static final Set<String> EXECUTE_CMDS_CHROME = new HashSet<>();
     /** The formatter to use for the <code>lastModified</code> attribute. */
     private static final DateTimeFormatter LAST_MODIFIED_DATE_FORMATTER
                                             = DateTimeFormatter.ofPattern("MM/dd/yyyy HH:mm:ss");
 
     /** Contains all supported DOM level 2 events. */
     private static final Map<String, Class<? extends Event>> SUPPORTED_DOM2_EVENT_TYPE_MAP;
     /** Contains all supported DOM level 3 events. DOM level 2 events are not included. */
     private static final Map<String, Class<? extends Event>> SUPPORTED_DOM3_EVENT_TYPE_MAP;
     /** Contains all supported vendor specific events. */
     private static final Map<String, Class<? extends Event>> SUPPORTED_VENDOR_EVENT_TYPE_MAP;
 
     /*
       Initializes the supported event type map.
       Map<String, Class> which maps strings a caller may use when calling into
       {@link #createEvent(String)} to the associated event class. To support a new
       event creation type, the event type and associated class need to be added into this map in
       the static initializer. The map is unmodifiable. Any class that is a value in this map MUST
       have a no-arg constructor.
      */
     static {
         final Map<String, Class<? extends Event>> dom2EventMap = new HashMap<>();
         dom2EventMap.put("HTMLEvents", Event.class);
         dom2EventMap.put("MouseEvents", MouseEvent.class);
         dom2EventMap.put("MutationEvents", MutationEvent.class);
         dom2EventMap.put("UIEvents", UIEvent.class);
         SUPPORTED_DOM2_EVENT_TYPE_MAP = Collections.unmodifiableMap(dom2EventMap);
 
         final Map<String, Class<? extends Event>> dom3EventMap = new HashMap<>();
         dom3EventMap.put("Event", Event.class);
         dom3EventMap.put("KeyboardEvent", KeyboardEvent.class);
         dom3EventMap.put("MouseEvent", MouseEvent.class);
         dom3EventMap.put("MessageEvent", MessageEvent.class);
         dom3EventMap.put("MutationEvent", MutationEvent.class);
         dom3EventMap.put("UIEvent", UIEvent.class);
         dom3EventMap.put("CustomEvent", CustomEvent.class);
         dom3EventMap.put("CloseEvent", CloseEvent.class);
         dom3EventMap.put("CompositionEvent", CompositionEvent.class);
         dom3EventMap.put("DragEvent", DragEvent.class);
         dom3EventMap.put("TextEvent", TextEvent.class);
         SUPPORTED_DOM3_EVENT_TYPE_MAP = Collections.unmodifiableMap(dom3EventMap);
 
         final Map<String, Class<? extends Event>> additionalEventMap = new HashMap<>();
         additionalEventMap.put("BeforeUnloadEvent", BeforeUnloadEvent.class);
         additionalEventMap.put("Events", Event.class);
         additionalEventMap.put("HashChangeEvent", HashChangeEvent.class);
         additionalEventMap.put("KeyEvents", KeyboardEvent.class);
         additionalEventMap.put("PointerEvent", PointerEvent.class);
         additionalEventMap.put("PopStateEvent", PopStateEvent.class);
         additionalEventMap.put("ProgressEvent", ProgressEvent.class);
         additionalEventMap.put("FocusEvent", FocusEvent.class);
         additionalEventMap.put("WheelEvent", WheelEvent.class);
         additionalEventMap.put("AnimationEvent", AnimationEvent.class);
         SUPPORTED_VENDOR_EVENT_TYPE_MAP = Collections.unmodifiableMap(additionalEventMap);
     }
 
     private Window window_;
     private DOMImplementation implementation_;
     private String designMode_;
     private String compatMode_;
     private int documentMode_ = -1;
     private String domain_;
     private String lastModified_;
     private ScriptableObject currentScript_;
     private transient FontFaceSet fonts_;
     private transient StyleSheetList styleSheetList_;
 
     private final Map<String, Blob> blobUrl2Blobs_ = new HashMap<>();
 
     static {
         // commands
         String[] cmds = {
             "BackColor", "BackgroundImageCache" /* Undocumented */,
             "Bold",
             "CreateLink", "Delete",
             "FontName", "FontSize", "ForeColor", "FormatBlock",
             "Indent", "InsertHorizontalRule", "InsertImage",
             "InsertOrderedList", "InsertParagraph", "InsertUnorderedList",
             "Italic", "JustifyCenter", "JustifyFull", "JustifyLeft", "JustifyNone",
             "JustifyRight",
             "Outdent",
             "Print",
             "Redo", "RemoveFormat",
             "SelectAll", "StrikeThrough", "Subscript", "Superscript",
             "Underline", "Undo", "Unlink", "Unselect"
         };
         for (final String cmd : cmds) {
             if (!"Bold".equals(cmd)) {
                 EXECUTE_CMDS_CHROME.add(cmd.toLowerCase(Locale.ROOT));
             }
         }
 
         cmds = new String[] {
             "backColor", "bold", "contentReadOnly", "copy", "createLink", "cut", "decreaseFontSize", "delete",
             "fontName", "fontSize", "foreColor", "formatBlock", "heading", "hiliteColor", "increaseFontSize",
             "indent", "insertHorizontalRule", "insertHTML", "insertImage", "insertOrderedList", "insertUnorderedList",
             "insertParagraph", "italic",
             "justifyCenter", "JustifyFull", "justifyLeft", "justifyRight", "outdent", "paste", "redo",
             "removeFormat", "selectAll", "strikeThrough", "subscript", "superscript", "underline", "undo", "unlink",
             "useCSS", "styleWithCSS"
         };
         for (final String cmd : cmds) {
             EXECUTE_CMDS_FF.add(cmd.toLowerCase(Locale.ROOT));
             if (!"bold".equals(cmd)) {
                 EXECUTE_CMDS_CHROME.add(cmd.toLowerCase(Locale.ROOT));
             }
         }
     }
 
     /**
      * JavaScript constructor.
      */
     @Override
     @JsxConstructor
     public void jsConstructor() {
         throw JavaScriptEngine.typeErrorIllegalConstructor();
     }
 
     /**
      * Sets the Window JavaScript object that encloses this document.
      * @param window the Window JavaScript object that encloses this document
      */
     public void setWindow(final Window window) {
         window_ = window;
     }
 
     /**
      * Returns the value of the {@code location} property.
      * @return the value of the {@code location} property
      */
     @JsxGetter
     public Location getLocation() {
         if (window_ == null) {
             return null;
         }
         return window_.getLocation();
     }
 
     /**
      * Sets the value of the {@code location} property. The location's default property is "href",
      * so setting "document.location='http://www.sf.net'" is equivalent to setting
      * "document.location.href='http://www.sf.net'".
      * @see <a href="http://msdn.microsoft.com/en-us/library/ms535866.aspx">MSDN documentation</a>
      * @param location the location to navigate to
      * @throws IOException when location loading fails
      */
     @JsxSetter
     public void setLocation(final String location) throws IOException {
         window_.setLocation(location);
     }
 
     /**
      * Returns the value of the {@code referrer} property.
      * @return the value of the {@code referrer} property
      */
     @JsxGetter
     public String getReferrer() {
         String referrer = "";
         final WebResponse webResponse = getPage().getWebResponse();
         if (webResponse != null) {
             referrer = webResponse.getWebRequest().getAdditionalHeaders().get(HttpHeader.REFERER);
             if (referrer == null) {
                 referrer = "";
             }
         }
         return referrer;
     }
 
     /**
      * Gets the JavaScript property {@code documentElement} for the document.
      * @return the root node for the document
      */
     @JsxGetter
     public Element getDocumentElement() {
         final Object documentElement = getPage().getDocumentElement();
         if (documentElement == null) {
             // for instance with an XML document with parsing error
             return null;
         }
         return (Element) getScriptableFor(documentElement);
     }
 
     /**
      * Gets the JavaScript property {@code rootElement}.
      * @return the root node for the document
      */
     @JsxGetter
     public Element getRootElement() {
         return null;
     }
 
     /**
      * Gets the JavaScript property {@code doctype} for the document.
      * @return the DocumentType of the document
      */
     @JsxGetter
     public HtmlUnitScriptable getDoctype() {
         final Object documentType = getPage().getDoctype();
         if (documentType == null) {
             return null;
         }
         return getScriptableFor(documentType);
     }
 
     /**
      * Returns a value which indicates whether or not the document can be edited.
      * @return a value which indicates whether or not the document can be edited
      */
     @JsxGetter
     public String getDesignMode() {
         if (designMode_ == null) {
             designMode_ = "off";
         }
         return designMode_;
     }
 
     /**
      * Sets a value which indicates whether or not the document can be edited.
      * @param mode a value which indicates whether or not the document can be edited
      */
     @JsxSetter
     public void setDesignMode(final String mode) {
         if ("on".equalsIgnoreCase(mode)) {
             designMode_ = "on";
             final SgmlPage page = getPage();
             if (page != null && page.isHtmlPage()
                     && getBrowserVersion().hasFeature(JS_DOCUMENT_SELECTION_RANGE_COUNT)) {
                 final HtmlPage htmlPage = (HtmlPage) page;
                 final DomNode child = htmlPage.getBody().getFirstChild();
                 final DomNode rangeNode = child == null ? htmlPage.getBody() : child;
                 htmlPage.setSelectionRange(new SimpleRange(rangeNode, 0));
             }
         }
         else if ("off".equalsIgnoreCase(mode)) {
             designMode_ = "off";
         }
     }
 
     /**
      * Returns the page that this document is modeling.
      * @return the page that this document is modeling
      */
     public SgmlPage getPage() {
         return (SgmlPage) getDomNodeOrDie();
     }
 
     /**
      * Gets the window in which this document is contained.
      * @return the window
      */
     @JsxGetter
     public Object getDefaultView() {
         return getWindow();
     }
 
     /**
      * Creates a new document fragment.
      * @return a newly created document fragment
      */
     @JsxFunction
     public HtmlUnitScriptable createDocumentFragment() {
         final DomDocumentFragment fragment = getDomNodeOrDie().getPage().createDocumentFragment();
         final DocumentFragment node = new DocumentFragment();
         node.setParentScope(getParentScope());
         node.setPrototype(getPrototype(node.getClass()));
         node.setDomNode(fragment);
         return getScriptableFor(fragment);
     }
 
     /**
      * Creates a new HTML attribute with the specified name.
      *
      * @param attributeName the name of the attribute to create
      * @return an attribute with the specified name
      */
     @JsxFunction
     public Attr createAttribute(final String attributeName) {
         return getPage().createAttribute(attributeName).getScriptableObject();
     }
 
     /**
      * Imports a node from another document to this document.
      * The source node is not altered or removed from the original document;
      * this method creates a new copy of the source node.
      *
      * @param importedNode the node to import
      * @param deep Whether to recursively import the subtree under the specified node; or not
      * @return the imported node that belongs to this Document
      */
     @JsxFunction
     public HtmlUnitScriptable importNode(final Node importedNode, final boolean deep) {
         DomNode domNode = importedNode.getDomNodeOrDie();
         domNode = domNode.cloneNode(deep);
         domNode.processImportNode(this);
         for (final DomNode childNode : domNode.getDescendants()) {
             childNode.processImportNode(this);
         }
         return domNode.getScriptableObject();
     }
 
     /**
      * Adopts a node from an external document.
      * The node and its subtree is removed from the document it's in (if any),
      * and its ownerDocument is changed to the current document.
      * The node can then be inserted into the current document.
      *
      * @param externalNode the node from another document to be adopted
      * @return the adopted node that can be used in the current document
      */
     @JsxFunction
     public HtmlUnitScriptable adoptNode(final Node externalNode) {
         externalNode.remove();
         return importNode(externalNode, true);
     }
 
     /**
      * Returns the implementation object of the current document.
      * @return implementation-specific object
      */
     @JsxGetter
     public DOMImplementation getImplementation() {
         if (implementation_ == null) {
             implementation_ = new DOMImplementation();
             implementation_.setParentScope(getWindow());
             implementation_.setPrototype(getPrototype(implementation_.getClass()));
         }
         return implementation_;
     }
 
     /**
      * Adapts any DOM node to resolve namespaces so that an XPath expression can be easily
      * evaluated relative to the context of the node where it appeared within the document.
      * @param nodeResolver the node to be used as a context for namespace resolution
      * @return an XPathNSResolver which resolves namespaces with respect to the definitions
      *         in scope for a specified node
      */
     @JsxFunction
     public XPathNSResolver createNSResolver(final Node nodeResolver) {
         final XPathNSResolver resolver = new XPathNSResolver();
         resolver.setElement(nodeResolver);
         resolver.setParentScope(getWindow());
         resolver.setPrototype(getPrototype(resolver.getClass()));
         return resolver;
     }
 
     /**
      * Create a new DOM text node with the given data.
      *
      * @param newData the string value for the text node
      * @return the new text node or NOT_FOUND if there is an error
      */
     @JsxFunction
     public HtmlUnitScriptable createTextNode(final String newData) {
         final DomNode domNode = new DomText(getDomNodeOrDie().getPage(), newData);
         return makeScriptableFor(domNode);
     }
 
     /**
      * Creates a new Comment.
      * @param comment the comment text
      * @return the new Comment
      */
     @JsxFunction
     public HtmlUnitScriptable createComment(final String comment) {
         final DomNode domNode = new DomComment(getDomNodeOrDie().getPage(), comment);
         return getScriptableFor(domNode);
     }
 
     /**
      * Evaluates an XPath expression string and returns a result of the specified type if possible.
      * @param expression the XPath expression string to be parsed and evaluated
      * @param contextNode the context node for the evaluation of this XPath expression
      * @param resolver the resolver permits translation of all prefixes, including the XML namespace prefix,
      *        within the XPath expression into appropriate namespace URIs.
      * @param type If a specific type is specified, then the result will be returned as the corresponding type
      * @param result the result object which may be reused and returned by this method
      * @return the result of the evaluation of the XPath expression
      */
     @JsxFunction
     public XPathResult evaluate(final String expression, final Node contextNode,
             final Object resolver, final int type, final Object result) {
         XPathResult xPathResult = null;
         if (result instanceof XPathResult) {
             xPathResult = (XPathResult) result;
 
             if (getBrowserVersion().hasFeature(JS_DOCUMENT_EVALUATE_RECREATES_RESULT)) {
                 xPathResult = new XPathResult();
                 xPathResult.setParentScope(getParentScope());
                 xPathResult.setPrototype(getPrototype(xPathResult.getClass()));
             }
         }
         else if (result == null
                 || JavaScriptEngine.isUndefined(result)
                 || result instanceof ScriptableObject) {
             xPathResult = new XPathResult();
             xPathResult.setParentScope(getParentScope());
             xPathResult.setPrototype(getPrototype(xPathResult.getClass()));
         }
         else {
             throw JavaScriptEngine.typeError("Argument 5 of Document.evaluate has to be an XPathResult or null.");
         }
 
         try {
             PrefixResolver prefixResolver = null;
             if (resolver instanceof NativeFunction) {
                 prefixResolver = new NativeFunctionPrefixResolver(
                                             (NativeFunction) resolver, contextNode.getParentScope());
             }
             else if (resolver instanceof PrefixResolver) {
                 prefixResolver = (PrefixResolver) resolver;
             }
             xPathResult.init(contextNode.getDomNodeOrDie().getByXPath(expression, prefixResolver), type);
             return xPathResult;
         }
         catch (final Exception e) {
             throw JavaScriptEngine.asJavaScriptException(
                     getWindow(),
                     "Failed to execute 'evaluate': " + e.getMessage(),
                     org.htmlunit.javascript.host.dom.DOMException.SYNTAX_ERR);
         }
     }
 
     /**
      * Creates a new element with the given tag name.
      *
      * @param tagName the tag name
      * @return the new HTML element, or NOT_FOUND if the tag is not supported
      */
     @JsxFunction
     public HtmlUnitScriptable createElement(final Object tagName) {
         if (tagName == null || JavaScriptEngine.isUndefined(tagName)) {
             final org.w3c.dom.Node element = getPage().createElement("unknown");
             ((HtmlUnknownElement) element).markAsCreatedByJavascript();
             return getScriptableFor(element);
         }
 
         // https://dom.spec.whatwg.org/#dom-document-createelement
         // NameStartChar ::= ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D]
         //                       | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF]
         //                       | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
         // NameChar      ::= NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
         // Name          ::= NameStartChar (NameChar)*
 
         // but i have no idea what the browsers are doing
         // the following code is a wild guess that might be good enough for the moment
         final String tagNameString = JavaScriptEngine.toString(tagName);
         if (tagNameString.length() > 0) {
             final int firstChar = tagNameString.charAt(0);
             if (!(isLetter(firstChar)
                     || ':' == firstChar
                     || '_' == firstChar)) {
                 if (LOG.isInfoEnabled()) {
                     LOG.info("createElement: Provided string '" + tagNameString + "' contains an invalid character");
                 }
                 throw JavaScriptEngine.asJavaScriptException(
                         getWindow(),
                         "createElement: Provided string '" + tagNameString + "' contains an invalid character",
                         org.htmlunit.javascript.host.dom.DOMException.INVALID_CHARACTER_ERR);
             }
             for (int i = 1; i < tagNameString.length(); i++) {
                 final int c = tagNameString.charAt(i);
                 if (!(Character.isLetterOrDigit(c)
                         || ':' == c
                         || '_' == c
                         || '-' == c
                         || '.' == c)) {
                     if (LOG.isInfoEnabled()) {
                         LOG.info("createElement: Provided string '"
                                     + tagNameString + "' contains an invalid character");
                     }
                     throw JavaScriptEngine.asJavaScriptException(
                             getWindow(),
                             "createElement: Provided string '" + tagNameString
                                 + "' contains an invalid character",
                             org.htmlunit.javascript.host.dom.DOMException.INVALID_CHARACTER_ERR);
                 }
             }
         }
 
         org.w3c.dom.Node element = getPage().createElement(tagNameString);
 
         if (element instanceof HtmlImage) {
             ((HtmlImage) element).markAsCreatedByJavascript();
         }
         else if (element instanceof HtmlRb) {
             ((HtmlRb) element).markAsCreatedByJavascript();
         }
         else if (element instanceof HtmlRp) {
             ((HtmlRp) element).markAsCreatedByJavascript();
         }
         else if (element instanceof HtmlRt) {
             ((HtmlRt) element).markAsCreatedByJavascript();
         }
         else if (element instanceof HtmlRtc) {
             ((HtmlRtc) element).markAsCreatedByJavascript();
         }
         else if (element instanceof HtmlUnknownElement) {
             ((HtmlUnknownElement) element).markAsCreatedByJavascript();
         }
         else if (element instanceof HtmlSvg) {
             element = UnknownElementFactory.INSTANCE.createElementNS(getPage(), "", "svg", null);
             ((HtmlUnknownElement) element).markAsCreatedByJavascript();
         }
         final HtmlUnitScriptable jsElement = getScriptableFor(element);
 
         if (jsElement == NOT_FOUND) {
             if (LOG.isDebugEnabled()) {
                 LOG.debug("createElement(" + tagName
                     + ") cannot return a result as there isn't a JavaScript object for the element "
                     + element.getClass().getName());
             }
         }
         return jsElement;
     }
 
     // our version of the Character.isLetter() without MODIFIER_LETTER
     private static boolean isLetter(final int codePoint) {
         return ((((1 << Character.UPPERCASE_LETTER)
                     | (1 << Character.LOWERCASE_LETTER)
                     | (1 << Character.TITLECASE_LETTER)
                     | (1 << Character.OTHER_LETTER)
                 ) >> Character.getType(codePoint)) & 1) != 0;
     }
 
     /**
      * Creates a new HTML element with the given tag name, and name.
      *
      * @param namespaceURI the URI that identifies an XML namespace
      * @param qualifiedName the qualified name of the element type to instantiate
      * @return the new HTML element, or NOT_FOUND if the tag is not supported
      */
     @JsxFunction
     public HtmlUnitScriptable createElementNS(final String namespaceURI, final String qualifiedName) {
         if ("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul".equals(namespaceURI)) {
             throw JavaScriptEngine.typeError("XUL not available");
         }
 
         final org.w3c.dom.Element element;
         if (Html.XHTML_NAMESPACE.equals(namespaceURI)
                 || Html.SVG_NAMESPACE.equals(namespaceURI)) {
             element = getPage().createElementNS(namespaceURI, qualifiedName);
         }
         else {
             element = new DomElement(namespaceURI, qualifiedName, getPage(), null);
         }
         return getScriptableFor(element);
     }
 
     /**
      * Returns all the descendant elements with the specified tag name.
      * @param tagName the name to search for
      * @return all the descendant elements with the specified tag name
      */
     @JsxFunction
     public HTMLCollection getElementsByTagName(final String tagName) {
         final HTMLCollection collection = new HTMLCollection(getDomNodeOrDie(), false);
 
         if (org.htmlunit.util.StringUtils.equalsChar('*', tagName)) {
             collection.setIsMatchingPredicate((Predicate<DomNode> & Serializable) node -> true);
         }
         else {
             collection.setIsMatchingPredicate(
                     (Predicate<DomNode> & Serializable)
                     node -> tagName.equalsIgnoreCase(node.getNodeName()));
         }
 
         return collection;
     }
 
     /**
      * Returns a list of elements with the given tag name belonging to the given namespace.
      * @param namespaceURI the namespace URI of elements to look for
      * @param localName is either the local name of elements to look for or the special value "*",
      *                  which matches all elements.
      * @return a live NodeList of found elements in the order they appear in the tree
      */
     @JsxFunction
     public HTMLCollection getElementsByTagNameNS(final Object namespaceURI, final String localName) {
         final HTMLCollection elements = new HTMLCollection(getDomNodeOrDie(), false);
         elements.setIsMatchingPredicate(
                 (Predicate<DomNode> & Serializable)
                 node -> localName.equals(node.getLocalName()));
         return elements;
     }
 
     /**
      * Returns the value of the {@code activeElement} property.
      * @see <a href="http://msdn.microsoft.com/en-us/library/ms533065.aspx">MSDN documentation</a>
      * @return the value of the {@code activeElement} property
      */
     @JsxGetter
     public Object getActiveElement() {
         return null;
     }
 
     /**
      * Returns the character encoding of the current document.
      * @return the character encoding of the current document
      */
     @JsxGetter
     public String getCharacterSet() {
         if (!(getPage() instanceof HtmlPage)) {
             // TODO: implement XmlPage.getCharset
             return "";
         }
         return getPage().getCharset().name();
     }
 
     /**
      * Retrieves the character set used to encode the document.
      * @return the character set used to encode the document
      */
     @JsxGetter
     public String getCharset() {
         if (!(getPage() instanceof HtmlPage)) {
             // TODO: implement XmlPage.getCharset
             return "";
         }
         return getPage().getCharset().name();
     }
 
     /**
      * Returns the value of the JavaScript property {@code anchors}.
      * @see <a href="http://msdn.microsoft.com/en-us/library/ms537435.aspx">MSDN documentation</a>
      * @see <a href="http://www.mozilla.org/docs/dom/domref/dom_doc_ref4.html#1024543">
      * Gecko DOM reference</a>
      * @return the value of this property
      */
     @JsxGetter
     public HTMLCollection getAnchors() {
         final HTMLCollection anchors = new HTMLCollection(getDomNodeOrDie(), true);
 
         anchors.setIsMatchingPredicate(
                 (Predicate<DomNode> & Serializable)
                 node -> {
                     if (!(node instanceof HtmlAnchor)) {
                         return false;
                     }
                     final HtmlAnchor anchor = (HtmlAnchor) node;
                     return anchor.hasAttribute(DomElement.NAME_ATTRIBUTE);
                 });
 
         anchors.setEffectOnCacheFunction(
                 (java.util.function.Function<HtmlAttributeChangeEvent, EffectOnCache> & Serializable)
                     event -> {
                         if (DomElement.NAME_ATTRIBUTE.equals(event.getName())
                                 || DomElement.ID_ATTRIBUTE.equals(event.getName())) {
                             return EffectOnCache.RESET;
                         }
                         return EffectOnCache.NONE;
                     });
 
         return anchors;
     }
 
     /**
      * Returns the value of the JavaScript property {@code applets}.
      * @see <a href="http://msdn.microsoft.com/en-us/library/ms537436.aspx">
      * MSDN documentation</a>
      * @see <a href="https://developer.mozilla.org/En/DOM:document.applets">
      * Gecko DOM reference</a>
      * @return the value of this property
      */
     @JsxGetter
     public HTMLCollection getApplets() {
         return new HTMLCollection(getDomNodeOrDie(), false);
     }
 
     /**
      * Returns this document's {@code body} element.
      * @return this document's {@code body} element
      */
     @JsxGetter
     public HTMLElement getBody() {
         final Page page = getPage();
         if (page instanceof HtmlPage) {
             final HtmlPage htmlPage = (HtmlPage) page;
             final HtmlElement body = htmlPage.getBody();
             if (body != null) {
                 return body.getScriptableObject();
             }
 
             // strange but this returns the frameset element
             final DomElement doc = htmlPage.getDocumentElement();
             if (doc != null) {
                 for (final DomNode node : doc.getChildren()) {
                     if (node instanceof HtmlFrameSet) {
                         return (HTMLElement) node.getScriptableObject();
                     }
                 }
             }
         }
         return null;
     }
 
     /**
      * Sets the {@code body} element of the document.
      * @param htmlElement the new html element
      */
     @JsxSetter
     public void setBody(final HTMLElement htmlElement) {
         if (htmlElement instanceof HTMLBodyElement || htmlElement instanceof HTMLFrameSetElement) {
             final Page page = getPage();
             if (page instanceof HtmlPage) {
                 final HtmlElement body = ((HtmlPage) page).getBody();
                 if (body != null) {
                     body.replace(htmlElement.getDomNodeOrDie());
                 }
             }
             return;
         }
         throw JavaScriptEngine.asJavaScriptException(
                 getWindow(),
                 "Failed to set the 'body' property on 'Document': "
                         + "The new body element is of type '" +  htmlElement.getTagName() + "'. "
                         + "It must be either a 'BODY' or 'FRAMESET' element.",
                 org.htmlunit.javascript.host.dom.DOMException.HIERARCHY_REQUEST_ERR);
     }
 
     /**
      * JavaScript function {@code close}.
      * <p>See <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/section-dynamic.html">
      * http://www.whatwg.org/specs/web-apps/current-work/multipage/section-dynamic.html</a> for
      * a good description of the semantics of open(), write(), writeln() and close().</p>
      *
      * @throws IOException if an IO problem occurs
      */
     @JsxFunction({CHROME, EDGE})
     public void close() throws IOException {
         // nothing to do
     }
 
     /**
      * Returns the {@code compatMode} property.
      * @return the {@code compatMode} property
      */
     @JsxGetter
     public String getCompatMode() {
         // initialize the modes
         getDocumentMode();
         return compatMode_;
     }
 
     /**
      * Returns the {@code documentMode} property.
      * @return the {@code documentMode} property
      */
     public int getDocumentMode() {
         if (documentMode_ != -1) {
             return documentMode_;
         }
 
         compatMode_ = "CSS1Compat";
 
         if (isQuirksDocType()) {
             compatMode_ = "BackCompat";
         }
 
         final float version = getBrowserVersion().getBrowserVersionNumeric();
         documentMode_ = (int) Math.floor(version);
         return documentMode_;
     }
 
     private boolean isQuirksDocType() {
         final DocumentType docType = getPage().getDoctype();
         if (docType != null) {
             final String systemId = docType.getSystemId();
             if (systemId != null) {
                 if ("http://www.w3.org/TR/html4/strict.dtd".equals(systemId)) {
                     return false;
                 }
 
                 if ("http://www.w3.org/TR/html4/loose.dtd".equals(systemId)) {
                     final String publicId = docType.getPublicId();
                     if ("-//W3C//DTD HTML 4.01 Transitional//EN".equals(publicId)) {
                         return false;
                     }
                 }
 
                 if ("http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd".equals(systemId)
                     || "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd".equals(systemId)) {
                     return false;
                 }
             }
             else if (docType.getPublicId() == null) {
                 return docType.getName() == null;
             }
         }
         return true;
     }
 
     /**
      * <span style="color:red">INTERNAL API - SUBJECT TO CHANGE AT ANY TIME - USE AT YOUR OWN RISK.</span><br>
      *
      * Called from the HTMLParser if a 'X-UA-Compatible' meta tag found.
      * @param documentMode the mode forced by the meta tag
      */
     public void forceDocumentMode(final int documentMode) {
         documentMode_ = documentMode;
         compatMode_ = documentMode == 5 ? "BackCompat" : "CSS1Compat";
     }
 
     /**
      * Returns the first element within the document that matches the specified group of selectors.
      * @param selectors the selectors
      * @return null if no matches are found; otherwise, it returns the first matching element
      */
     @JsxFunction
     public Node querySelector(final String selectors) {
         try {
             final DomNode node = getDomNodeOrDie().querySelector(selectors);
             if (node != null) {
                 return node.getScriptableObject();
             }
             return null;
         }
         catch (final CSSException e) {
             throw JavaScriptEngine.asJavaScriptException(
                     getWindow(),
                     "An invalid or illegal selector was specified (selector: '"
                             + selectors + "' error: " + e.getMessage() + ").",
                     org.htmlunit.javascript.host.dom.DOMException.SYNTAX_ERR);
         }
     }
 
     /**
      * Retrieves all element nodes from descendants of the starting element node that match any selector
      * within the supplied selector strings.
      * The NodeList object returned by the querySelectorAll() method must be static, not live.
      * @param selectors the selectors
      * @return the static node list
      */
     @JsxFunction
     public NodeList querySelectorAll(final String selectors) {
         try {
             return NodeList.staticNodeList(this, getDomNodeOrDie().querySelectorAll(selectors));
         }
         catch (final CSSException e) {
             throw JavaScriptEngine.asJavaScriptException(
                     getWindow(),
                     "An invalid or illegal selector was specified (selector: '"
                             + selectors + "' error: " + e.getMessage() + ").",
                     org.htmlunit.javascript.host.dom.DOMException.SYNTAX_ERR);
         }
     }
 
     /**
      * Indicates if the command is supported.
      * @see <a href="http://msdn2.microsoft.com/en-us/library/ms536681.aspx">MSDN documentation</a>
      * @param cmd the command identifier
      * @return {@code true} if the command is supported
      */
     @JsxFunction
     public boolean queryCommandSupported(final String cmd) {
         return hasCommand(cmd, true);
     }
 
     private boolean hasCommand(final String cmd, final boolean includeBold) {
         if (null == cmd) {
             return false;
         }
 
         final String cmdLC = cmd.toLowerCase(Locale.ROOT);
         if (getBrowserVersion().isChrome() || getBrowserVersion().isEdge()) {
             return EXECUTE_CMDS_CHROME.contains(cmdLC) || (includeBold && "bold".equalsIgnoreCase(cmd));
         }
         return EXECUTE_CMDS_FF.contains(cmdLC);
     }
 
     /**
      * Indicates if the command can be successfully executed using <code>execCommand</code>, given
      * the current state of the document.
      * @param cmd the command identifier
      * @return {@code true} if the command can be successfully executed
      */
     @JsxFunction
     public boolean queryCommandEnabled(final String cmd) {
         return hasCommand(cmd, true);
     }
 
     /**
      * Executes a command.
      * @see <a href="http://msdn2.microsoft.com/en-us/library/ms536419.aspx">MSDN documentation</a>
      * @param cmd the command identifier
      * @param userInterface display a user interface if the command supports one
      * @param value the string, number, or other value to assign (possible values depend on the command)
      * @return {@code true} if the command was successful, {@code false} otherwise
      */
     @JsxFunction
     public boolean execCommand(final String cmd, final boolean userInterface, final Object value) {
         if (!hasCommand(cmd, false)) {
             return false;
         }
         if (LOG.isWarnEnabled()) {
             LOG.warn("Nothing done for execCommand(" + cmd + ", ...) (feature not implemented)");
         }
         return true;
     }
 
     /**
      * Returns the value of the {@code URL} property.
      * @return the value of the {@code URL} property
      */
     @JsxGetter(propertyName = "URL")
     public String getURL_js() {
         return getPage().getUrl().toExternalForm();
     }
 
     /**
      * Returns the value of the {@code documentURI} property.
      * @return the value of the {@code documentURI} property
      */
     @JsxGetter
     public String getDocumentURI() {
         return getURL_js();
     }
 
     /**
      * Returns the {@code cookie} property.
      * @return the {@code cookie} property
      */
     @JsxGetter
     public String getCookie() {
         final SgmlPage sgmlPage = getPage();
 
         final StringBuilder builder = new StringBuilder();
         final Set<Cookie> cookies = sgmlPage.getWebClient().getCookies(sgmlPage.getUrl());
         for (final Cookie cookie : cookies) {
             if (cookie.isHttpOnly()) {
                 continue;
             }
             if (builder.length() != 0) {
                 builder.append("; ");
             }
             if (!HtmlUnitBrowserCompatCookieSpec.EMPTY_COOKIE_NAME.equals(cookie.getName())) {
                 builder.append(cookie.getName()).append('=');
             }
             builder.append(cookie.getValue());
         }
 
         return builder.toString();
     }
 
     /**
      * Adds a cookie, as long as cookies are enabled.
      * @see <a href="http://msdn.microsoft.com/en-us/library/ms533693.aspx">MSDN documentation</a>
      * @param newCookie in the format "name=value[;expires=date][;domain=domainname][;path=path][;secure]
      */
     @JsxSetter
     public void setCookie(final String newCookie) {
         final SgmlPage sgmlPage = getPage();
         final WebClient client = sgmlPage.getWebClient();
 
         if (StringUtils.isBlank(newCookie)
                 && client.getBrowserVersion().hasFeature(HTMLDOCUMENT_COOKIES_IGNORE_BLANK)) {
             return;
         }
         client.addCookie(newCookie, sgmlPage.getUrl(), this);
     }
 
     /**
      * Implementation of the {@link org.w3c.dom.events.DocumentEvent} interface's
      * {@link org.w3c.dom.events.DocumentEvent#createEvent(String)} method. The method creates an
      * uninitialized event of the specified type.
      *
      * @see <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-DocumentEvent">DocumentEvent</a>
      * @param eventType the event type to create
      * @return an event object for the specified type
      * @throws DOMException if the event type is not supported (will have a type of
      *         DOMException.NOT_SUPPORTED_ERR)
      */
     @JsxFunction
     public Event createEvent(final String eventType) throws DOMException {
         Class<? extends Event> clazz = SUPPORTED_DOM2_EVENT_TYPE_MAP.get(eventType);
         if (clazz == null) {
             clazz = SUPPORTED_DOM3_EVENT_TYPE_MAP.get(eventType);
             if (CloseEvent.class == clazz
                     && getBrowserVersion().hasFeature(EVENT_ONCLOSE_DOCUMENT_CREATE_NOT_SUPPORTED)) {
                 clazz = null;
             }
             else if (TextEvent.class == clazz
                     && !getBrowserVersion().hasFeature(EVENT_TYPE_TEXTEVENT)) {
                 clazz = CompositionEvent.class;
             }
         }
 
         if (MutationEvent.class == clazz
                 && !getBrowserVersion().hasFeature(EVENT_TYPE_MUTATIONEVENT)) {
             clazz = null;
         }
         else if (clazz == null
                 && ("Events".equals(eventType)
                     || "HashChangeEvent".equals(eventType)
                     || "BeforeUnloadEvent".equals(eventType)
                     || "PopStateEvent".equals(eventType)
                     || "FocusEvent".equals(eventType)
                     || "WheelEvent".equals(eventType)
                             && getBrowserVersion().hasFeature(EVENT_TYPE_WHEELEVENT)
                     || "AnimationEvent".equals(eventType))) {
             clazz = SUPPORTED_VENDOR_EVENT_TYPE_MAP.get(eventType);
 
             if (PopStateEvent.class == clazz
                     && getBrowserVersion().hasFeature(EVENT_ONPOPSTATE_DOCUMENT_CREATE_NOT_SUPPORTED)) {
                 clazz = null;
             }
             if (AnimationEvent.class == clazz
                     && getBrowserVersion().hasFeature(EVENT_ONANIMATION_DOCUMENT_CREATE_NOT_SUPPORTED)) {
                 clazz = null;
             }
         }
 
         if (clazz == null) {
             throw JavaScriptEngine.asJavaScriptException(
                     this,
                     "Event Type '" + eventType + "' is not supported.",
                     org.htmlunit.javascript.host.dom.DOMException.NOT_SUPPORTED_ERR);
         }
 
         try {
             final Event event = clazz.getDeclaredConstructor().newInstance();
             event.setParentScope(getWindow());
             event.setPrototype(getPrototype(clazz));
             event.eventCreated();
             return event;
         }
         catch (final InstantiationException | IllegalAccessException
                 | IllegalArgumentException | InvocationTargetException | NoSuchMethodException | SecurityException e) {
             throw JavaScriptEngine.reportRuntimeError("Failed to instantiate event: class ='" + clazz.getName()
                             + "' for event type of '" + eventType + "': " + e.getMessage());
         }
     }
 
     /**
      * Returns a new NodeIterator object.
      *
      * @param root The root node at which to begin the NodeIterator's traversal.
      * @param whatToShow an optional long representing a bitmask created by combining
      *        the constant properties of {@link NodeFilter}
      * @param filter an object implementing the {@link NodeFilter} interface
      * @return a new NodeIterator object
      */
     @JsxFunction
     public NodeIterator createNodeIterator(final Node root, final int whatToShow, final Scriptable filter) {
         final org.w3c.dom.traversal.NodeFilter filterWrapper = createFilterWrapper(filter, false);
         final NodeIterator iterator = new NodeIterator(root, whatToShow, filterWrapper);
         iterator.setParentScope(getParentScope());
         iterator.setPrototype(getPrototype(iterator.getClass()));
         return iterator;
     }
 
     private static org.w3c.dom.traversal.NodeFilter createFilterWrapper(final Scriptable filter,
             final boolean filterFunctionOnly) {
         org.w3c.dom.traversal.NodeFilter filterWrapper = null;
         if (filter != null) {
             filterWrapper = n -> {
                 final Object[] args = {((DomNode) n).getScriptableObject()};
                 final Object response;
                 if (filter instanceof Callable) {
                     response = ((Callable) filter).call(Context.getCurrentContext(), filter, filter, args);
                 }
                 else {
                     if (filterFunctionOnly) {
                         throw JavaScriptEngine.reportRuntimeError("only a function is allowed as filter");
                     }
                     response = ScriptableObject.callMethod(filter, "acceptNode", args);
                 }
                 return (short) JavaScriptEngine.toNumber(response);
             };
         }
         return filterWrapper;
     }
 
     /**
      * Creates and returns a new TreeWalker. The following JavaScript parameters are passed into this method:
      * <ul>
      *   <li>JavaScript param 1: The root node of the TreeWalker. Must not be {@code null}.</li>
      *   <li>JavaScript param 2: Flag specifying which types of nodes appear in the logical view of the TreeWalker.
      *       See {@link NodeFilter} for the set of possible Show_ values.</li>
      *   <li>JavaScript param 3: The {@link NodeFilter} to be used with this TreeWalker, or {@code null}
      *       to indicate no filter.</li>
      *   <li>JavaScript param 4: If {@code false}, the contents of EntityReference nodes are not present
      *       in the logical view.</li>
      * </ul>
      *
      * @see <a href="http://www.w3.org/TR/DOM-Level-2-Traversal-Range/traversal.html">DOM-Level-2-Traversal-Range</a>
      * @param root the node which will serve as the root for the TreeWalker
      * @param whatToShow specifies which node types may appear in the logical view of the tree presented
      * @param filter the NodeFilter to be used with this TreeWalker, or null to indicate no filter
      * @param expandEntityReferences If false,
      *        the contents of EntityReference nodes are not presented in the logical view
      * @throws DOMException on attempt to create a TreeWalker with a root that is {@code null}
      * @return a new TreeWalker
      */
     @JsxFunction
     public TreeWalker createTreeWalker(final Node root, final double whatToShow, final Scriptable filter,
             boolean expandEntityReferences) throws DOMException {
 
         // seems that Rhino doesn't like long as parameter type
         // this strange conversation preserves NodeFilter.SHOW_ALL
         final int whatToShowI = (int) Double.valueOf(whatToShow).longValue();
 
         expandEntityReferences = false;
 
         final org.w3c.dom.traversal.NodeFilter filterWrapper = createFilterWrapper(filter, false);
         final TreeWalker t = new TreeWalker(root, whatToShowI, filterWrapper, expandEntityReferences);
         t.setParentScope(getWindow(this));
         t.setPrototype(staticGetPrototype(getWindow(this), TreeWalker.class));
         return t;
     }
 
     @SuppressWarnings("unchecked")
     private static Scriptable staticGetPrototype(final Window window,
             final Class<? extends HtmlUnitScriptable> javaScriptClass) {
         final Scriptable prototype = window.getPrototype(javaScriptClass);
         if (prototype == null && javaScriptClass != HtmlUnitScriptable.class) {
             return staticGetPrototype(window, (Class<? extends HtmlUnitScriptable>) javaScriptClass.getSuperclass());
         }
         return prototype;
     }
 
     /**
      * Creates and returns a new range.
      * @return a new range
      * @see <a href="http://www.xulplanet.com/references/objref/HTMLDocument.html#method_createRange">XUL Planet</a>
      */
     @JsxFunction
     public Range createRange() {
         final Range range = new Range(this);
         range.setParentScope(getWindow());
         range.setPrototype(getPrototype(Range.class));
         return range;
     }
 
     /**
      * Returns the domain name of the server that served the document, or {@code null} if the server
      * cannot be identified by a domain name.
      * @return the domain name of the server that served the document
      * @see <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-html.html#ID-2250147">
      * W3C documentation</a>
      */
     @JsxGetter
     public String getDomain() {
         if (domain_ == null && getPage().getWebResponse() != null) {
             URL url = getPage().getUrl();
             if (url == UrlUtils.URL_ABOUT_BLANK) {
                 final WebWindow w = getWindow().getWebWindow();
                 if (w instanceof FrameWindow) {
                     url = ((FrameWindow) w).getEnclosingPage().getUrl();
                 }
                 else {
                     return null;
                 }
             }
             domain_ = url.getHost().toLowerCase(Locale.ROOT);
         }
 
         return domain_;
     }
 
     /**
      * Sets the domain of this document.
      *
      * <p>Domains can only be set to suffixes of the existing domain
      * with the exception of setting the domain to itself.</p>
      * <p>
      * The domain will be set according to the following rules:
      * <ol>
      * <li>If the newDomain.equalsIgnoreCase(currentDomain) the method returns with no error.</li>
      * <li>If the browser version is netscape, the newDomain is downshifted.</li>
      * <li>The change will take place if and only if the suffixes of the
      *       current domain and the new domain match AND there are at least
      *       two domain qualifiers e.g. the following transformations are legal
      *       d1.d2.d3.gargoylesoftware.com may be transformed to itself or:
      *          d2.d3.gargoylesoftware.com
      *             d3.gargoylesoftware.com
      *                gargoylesoftware.com
      * <p>
      *        transformation to:        com
      *        will fail
      * </li>
      * </ol>
      * <p>
      * TODO This code could be modified to understand country domain suffixes.
      * The domain www.bbc.co.uk should be trimmable only down to bbc.co.uk
      * trimming to co.uk should not be possible.
      * @param newDomain the new domain to set
      */
     @JsxSetter
     public void setDomain(String newDomain) {
         newDomain = newDomain.toLowerCase(Locale.ROOT);
 
         final String currentDomain = getDomain();
         if (currentDomain.equalsIgnoreCase(newDomain)) {
             return;
         }
 
         if (newDomain.indexOf('.') == -1) {
             throw JavaScriptEngine.reportRuntimeError("Illegal domain value, cannot set domain from: \""
                     + currentDomain + "\" to: \"" + newDomain + "\" (new domain has to contain a dot).");
         }
 
         if (currentDomain.indexOf('.') > -1
                 && !currentDomain.toLowerCase(Locale.ROOT).endsWith("." + newDomain.toLowerCase(Locale.ROOT))) {
             throw JavaScriptEngine.reportRuntimeError("Illegal domain value, cannot set domain from: \""
                     + currentDomain + "\" to: \"" + newDomain + "\"");
         }
 
         domain_ = newDomain;
     }
 
     /**
      * Sets the {@code onclick} event handler for this element.
      * @param handler the {@code onclick} event handler for this element
      */
     @JsxSetter
     public void setOnclick(final Object handler) {
         setEventHandler(MouseEvent.TYPE_CLICK, handler);
     }
 
     /**
      * Returns the {@code onclick} event handler for this element.
      * @return the {@code onclick} event handler for this element
      */
     @JsxGetter
     public Function getOnclick() {
         return getEventHandler(MouseEvent.TYPE_CLICK);
     }
 
     /**
      * Sets the {@code ondblclick} event handler for this element.
      * @param handler the {@code ondblclick} event handler for this element
      */
     @JsxSetter
     public void setOndblclick(final Object handler) {
         setEventHandler(MouseEvent.TYPE_DBL_CLICK, handler);
     }
 
     /**
      * Returns the {@code ondblclick} event handler for this element.
      * @return the {@code ondblclick} event handler for this element
      */
     @JsxGetter
     public Function getOndblclick() {
         return getEventHandler(MouseEvent.TYPE_DBL_CLICK);
     }
 
     /**
      * Sets the {@code onblur} event handler for this element.
      * @param handler the {@code onblur} event handler for this element
      */
     @JsxSetter
     public void setOnblur(final Object handler) {
         setEventHandler(Event.TYPE_BLUR, handler);
     }
 
     /**
      * Returns the {@code onblur} event handler for this element.
      * @return the {@code onblur} event handler for this element
      */
     @JsxGetter
     public Function getOnblur() {
         return getEventHandler(Event.TYPE_BLUR);
     }
 
     /**
      * Sets the {@code onfocus} event handler for this element.
      * @param handler the {@code onfocus} event handler for this element
      */
     @JsxSetter
     public void setOnfocus(final Object handler) {
         setEventHandler(Event.TYPE_FOCUS, handler);
     }
 
     /**
      * Returns the {@code onfocus} event handler for this element.
      * @return the {@code onfocus} event handler for this element
      */
     @JsxGetter
     public Function getOnfocus() {
         return getEventHandler(Event.TYPE_FOCUS);
     }
 
     /**
      * Sets the {@code onkeydown} event handler for this element.
      * @param handler the {@code onkeydown} event handler for this element
      */
     @JsxSetter
     public void setOnkeydown(final Object handler) {
         setEventHandler(Event.TYPE_KEY_DOWN, handler);
     }
 
     /**
      * Returns the {@code onkeydown} event handler for this element.
      * @return the {@code onkeydown} event handler for this element
      */
     @JsxGetter
     public Function getOnkeydown() {
         return getEventHandler(Event.TYPE_KEY_DOWN);
     }
 
     /**
      * Sets the {@code onkeypress} event handler for this element.
      * @param handler the {@code onkeypress} event handler for this element
      */
     @JsxSetter
     public void setOnkeypress(final Object handler) {
         setEventHandler(Event.TYPE_KEY_PRESS, handler);
     }
 
     /**
      * Returns the {@code onkeypress} event handler for this element.
      * @return the {@code onkeypress} event handler for this element
      */
     @JsxGetter
     public Function getOnkeypress() {
         return getEventHandler(Event.TYPE_KEY_PRESS);
     }
 
     /**
      * Sets the {@code onkeyup} event handler for this element.
      * @param handler the {@code onkeyup} event handler for this element
      */
     @JsxSetter
     public void setOnkeyup(final Object handler) {
         setEventHandler(Event.TYPE_KEY_UP, handler);
     }
 
     /**
      * Returns the {@code onkeyup} event handler for this element.
      * @return the {@code onkeyup} event handler for this element
      */
     @JsxGetter
     public Function getOnkeyup() {
         return getEventHandler(Event.TYPE_KEY_UP);
     }
 
     /**
      * Sets the {@code onmousedown} event handler for this element.
      * @param handler the {@code onmousedown} event handler for this element
      */
     @JsxSetter
     public void setOnmousedown(final Object handler) {
         setEventHandler(MouseEvent.TYPE_MOUSE_DOWN, handler);
     }
 
     /**
      * Returns the {@code onmousedown} event handler for this element.
      * @return the {@code onmousedown} event handler for this element
      */
     @JsxGetter
     public Function getOnmousedown() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_DOWN);
     }
 
     /**
      * Sets the {@code onmousemove} event handler for this element.
      * @param handler the {@code onmousemove} event handler for this element
      */
     @JsxSetter
     public void setOnmousemove(final Object handler) {
         setEventHandler(MouseEvent.TYPE_MOUSE_MOVE, handler);
     }
 
     /**
      * Returns the {@code onmousemove} event handler for this element.
      * @return the {@code onmousemove} event handler for this element
      */
     @JsxGetter
     public Function getOnmousemove() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_MOVE);
     }
 
     /**
      * Sets the {@code onmouseout} event handler for this element.
      * @param handler the {@code onmouseout} event handler for this element
      */
     @JsxSetter
     public void setOnmouseout(final Object handler) {
         setEventHandler(MouseEvent.TYPE_MOUSE_OUT, handler);
     }
 
     /**
      * Returns the {@code onmouseout} event handler for this element.
      * @return the {@code onmouseout} event handler for this element
      */
     @JsxGetter
     public Function getOnmouseout() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_OUT);
     }
 
     /**
      * Sets the {@code onmouseover} event handler for this element.
      * @param handler the {@code onmouseover} event handler for this element
      */
     @JsxSetter
     public void setOnmouseover(final Object handler) {
         setEventHandler(MouseEvent.TYPE_MOUSE_OVER, handler);
     }
 
     /**
      * Returns the {@code onmouseover} event handler for this element.
      * @return the {@code onmouseover} event handler for this element
      */
     @JsxGetter
     public Function getOnmouseover() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_OVER);
     }
 
     /**
      * Sets the {@code onmouseup} event handler for this element.
      * @param handler the {@code onmouseup} event handler for this element
      */
     @JsxSetter
     public void setOnmouseup(final Object handler) {
         setEventHandler(MouseEvent.TYPE_MOUSE_UP, handler);
     }
 
     /**
      * Returns the {@code onmouseup} event handler for this element.
      * @return the {@code onmouseup} event handler for this element
      */
     @JsxGetter
     public Function getOnmouseup() {
         return getEventHandler(MouseEvent.TYPE_MOUSE_UP);
     }
 
     /**
      * Sets the {@code oncontextmenu} event handler for this element.
      * @param handler the {@code oncontextmenu} event handler for this element
      */
     @JsxSetter
     public void setOncontextmenu(final Object handler) {
         setEventHandler(MouseEvent.TYPE_CONTEXT_MENU, handler);
     }
 
     /**
      * Returns the {@code oncontextmenu} event handler for this element.
      * @return the {@code oncontextmenu} event handler for this element
      */
     @JsxGetter
     public Function getOncontextmenu() {
         return getEventHandler(MouseEvent.TYPE_CONTEXT_MENU);
     }
 
     /**
      * Sets the {@code onresize} event handler for this element.
      * @param handler the {@code onresize} event handler for this element
      */
     @JsxSetter
     public void setOnresize(final Object handler) {
         setEventHandler(Event.TYPE_RESIZE, handler);
     }
 
     /**
      * Returns the {@code onresize} event handler for this element.
      * @return the {@code onresize} event handler for this element
      */
     @JsxGetter
     public Function getOnresize() {
         return getEventHandler(Event.TYPE_RESIZE);
     }
 
     /**
      * Sets the {@code onerror} event handler for this element.
      * @param handler the {@code onerror} event handler for this element
      */
     @JsxSetter
     public void setOnerror(final Object handler) {
         setEventHandler(Event.TYPE_ERROR, handler);
     }
 
     /**
      * Returns the {@code onerror} event handler for this element.
      * @return the {@code onerror} event handler for this element
      */
     @JsxGetter
     public Function getOnerror() {
         return getEventHandler(Event.TYPE_ERROR);
     }
 
     /**
      * Returns the {@code oninput} event handler for this element.
      * @return the {@code oninput} event handler for this element
      */
     @JsxGetter
     public Function getOninput() {
         return getEventHandler(Event.TYPE_INPUT);
     }
 
     /**
      * Sets the {@code oninput} event handler for this element.
      * @param oninput the {@code oninput} event handler for this element
      */
     @JsxSetter
     public void setOninput(final Object oninput) {
         setEventHandler(Event.TYPE_INPUT, oninput);
     }
 
     /**
      * Returns the {@code hidden} property.
      * @return the {@code hidden} property
      */
     @JsxGetter
     public boolean getHidden() {
         return false;
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     @JsxGetter
     public int getChildElementCount() {
         int counter = 0;
         if (getPage().getDocumentElement() != null) {
             counter++;
         }
         return counter;
     }
 
     /**
      * Returns the element for the specified x coordinate and the specified y coordinate.
      * The current implementation always returns null element.
      *
      * @param x the x offset, in pixels
      * @param y the y offset, in pixels
      * @return the element for the specified x coordinate and the specified y coordinate
      */
     @JsxFunction
     public HtmlUnitScriptable elementFromPoint(final int x, final int y) {
         return null;
     }
 
     /**
      * Returns the value of the {@code forms} property.
      * @return the value of the {@code forms} property
      */
     @JsxGetter
     public HTMLCollection getForms() {
         final HTMLCollection forms = new HTMLCollection(getDomNodeOrDie(), false) {
             @Override
             public Object call(final Context cx, final Scriptable scope,
                     final Scriptable thisObj, final Object[] args) {
                 throw JavaScriptEngine.typeError("document.forms is not a function");
             }
         };
 
         forms.setIsMatchingPredicate(
                 (Predicate<DomNode> & Serializable)
                 node -> node instanceof HtmlForm && node.getPrefix() == null);
         return forms;
     }
 
     /**
      * Returns the value of the {@code embeds} property.
      * @return the value of the {@code embeds} property
      */
     @JsxGetter
     public HTMLCollection getEmbeds() {
         final HTMLCollection embeds = new HTMLCollection(getDomNodeOrDie(), false) {
             @Override
             public Object call(final Context cx, final Scriptable scope,
                     final Scriptable thisObj, final Object[] args) {
                 throw JavaScriptEngine.typeError("document.embeds is not a function");
             }
         };
 
         embeds.setIsMatchingPredicate((Predicate<DomNode> & Serializable) node -> node instanceof HtmlEmbed);
         return embeds;
     }
 
     /**
      * Returns the value of the {@code embeds} property.
      * @return the value of the {@code embeds} property
      */
     @JsxGetter
     public HTMLCollection getImages() {
         final HTMLCollection images = new HTMLCollection(getDomNodeOrDie(), false) {
             @Override
             public Object call(final Context cx, final Scriptable scope,
                     final Scriptable thisObj, final Object[] args) {
                 throw JavaScriptEngine.typeError("document.images is not a function");
             }
         };
 
         images.setIsMatchingPredicate((Predicate<DomNode> & Serializable) node -> node instanceof HtmlImage);
         return images;
     }
 
     /**
      * Returns the value of the {@code scripts} property.
      * @return the value of the {@code scripts} property
      */
     @JsxGetter
     public HTMLCollection getScripts() {
         final HTMLCollection scripts = new HTMLCollection(getDomNodeOrDie(), false) {
             @Override
             public Object call(final Context cx, final Scriptable scope,
                     final Scriptable thisObj, final Object[] args) {
                 throw JavaScriptEngine.typeError("document.scripts is not a function");
             }
         };
 
         scripts.setIsMatchingPredicate((Predicate<DomNode> & Serializable) node -> node instanceof HtmlScript);
         return scripts;
     }
 
     /**
      * Retrieves a collection of stylesheet objects representing the style sheets that correspond
      * to each instance of a Link or
      * {@link org.htmlunit.javascript.host.css.CSSStyleDeclaration} object in the document.
      *
      * @return styleSheet collection
      */
     @JsxGetter
     public StyleSheetList getStyleSheets() {
         if (styleSheetList_ == null) {
             styleSheetList_ = new StyleSheetList(this);
         }
         return styleSheetList_;
     }
 
     /**
      * Returns the value of the {@code plugins} property.
      * @return the value of the {@code plugins} property
      */
     @JsxGetter
     public HTMLCollection getPlugins() {
         return getEmbeds();
     }
 
     /**
      * Returns the value of the JavaScript property {@code links}. Refer also to the
      * <a href="http://msdn.microsoft.com/en-us/library/ms537465.aspx">MSDN documentation</a>.
      * @return the value of this property
      */
     @JsxGetter
     public HTMLCollection getLinks() {
         final HTMLCollection links = new HTMLCollection(getDomNodeOrDie(), true);
 
         links.setEffectOnCacheFunction(
                 (java.util.function.Function<HtmlAttributeChangeEvent, EffectOnCache> & Serializable)
                 event -> {
                     final HtmlElement node = event.getHtmlElement();
                     if ((node instanceof HtmlAnchor || node instanceof HtmlArea) && "href".equals(event.getName())) {
                         return EffectOnCache.RESET;
                     }
                     return EffectOnCache.NONE;
                 });
 
         links.setIsMatchingPredicate(
                 (Predicate<DomNode> & Serializable)
                 node ->
                     (node instanceof HtmlAnchor || node instanceof HtmlArea)
                     && ((HtmlElement) node).hasAttribute("href"));
 
         return links;
     }
 
     /**
      * Returns all the descendant elements with the specified class name.
      * @param className the name to search for
      * @return all the descendant elements with the specified class name
      * @see <a href="https://developer.mozilla.org/en/DOM/document.getElementsByClassName">Mozilla doc</a>
      */
     @JsxFunction
     public HTMLCollection getElementsByClassName(final String className) {
         return null;
     }
 
     /**
      * Returns all HTML elements that have a {@code name} attribute with the specified value.
      * <p>
      * Refer to <a href="http://www.w3.org/TR/DOM-Level-2-HTML/html.html#ID-71555259">
      * The DOM spec</a> for details.
      *
      * @param elementName - value of the {@code name} attribute to look for
      * @return all HTML elements that have a {@code name} attribute with the specified value
      */
     @JsxFunction
     public NodeList getElementsByName(final String elementName) {
         return null;
     }
 
     /**
      * Returns {@code false} if the active element in the document has no focus;
      * {@code true} if the active element in the document has focus.
      * @return whether the active element in the document has focus or not
      */
     @JsxFunction
     public boolean hasFocus() {
         return false;
     }
 
     /**
      * Returns this document's title.
      * @return this document's title
      */
     @JsxGetter
     public String getTitle() {
         return "";
     }
 
     /**
      * Sets this document's title.
      * @param title the new title
      */
     @JsxSetter
     public void setTitle(final String title) {
         // nothing to do
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     @JsxGetter
     public HTMLCollection getChildren() {
         return super.getChildren();
     }
 
     /**
      * Returns the {@code contentType} property.
      * @return the {@code contentType} property
      */
     @JsxGetter
     public String getContentType() {
         return getPage().getContentType();
     }
 
     /**
      * Returns the current selection.
      * @return the current selection
      */
     @JsxFunction
     public Selection getSelection() {
         return null;
     }
 
     /**
      * Returns this document's {@code head} element.
      * @return this document's {@code head} element
      */
     @JsxGetter
     public Object getHead() {
         return null;
     }
 
     /**
      * Returns a string representing the encoding under which the document was parsed.
      * @return a string representing the encoding under which the document was parsed
      */
     @JsxGetter
     public String getInputEncoding() {
         return getPage().getCharset().name();
     }
 
     /**
      * Returns the last modification date of the document.
      * @see <a href="https://developer.mozilla.org/en/DOM/document.lastModified">Mozilla documentation</a>
      * @return the date as string
      */
     @JsxGetter
     public String getLastModified() {
         if (lastModified_ == null) {
             final WebResponse webResponse = getPage().getWebResponse();
             final Date lastModified;
             if (webResponse != null) {
                 String stringDate = webResponse.getResponseHeaderValue("Last-Modified");
                 if (stringDate == null) {
                     stringDate = webResponse.getResponseHeaderValue("Date");
                 }
                 lastModified = parseDateOrNow(stringDate);
             }
             else {
                 lastModified = new Date();
             }
 
             final ZoneId zoneid = Context.getCurrentContext().getTimeZone().toZoneId();
             lastModified_ = LAST_MODIFIED_DATE_FORMATTER.format(lastModified.toInstant().atZone(zoneid));
         }
         return lastModified_;
     }
 
     private static Date parseDateOrNow(final String stringDate) {
         final Date date = HttpUtils.parseDate(stringDate);
         if (date == null) {
             return new Date();
         }
         return date;
     }
 
     /**
      * Mock for the moment.
      */
     @JsxFunction({FF, FF_ESR})
     public void releaseCapture() {
         // nothing to do
     }
 
     /**
      * Returns the ready state of the document.
      * @return the ready state of the document
      *
      * @see DomNode#READY_STATE_UNINITIALIZED
      * @see DomNode#READY_STATE_LOADING
      * @see DomNode#READY_STATE_LOADED
      * @see DomNode#READY_STATE_INTERACTIVE
      * @see DomNode#READY_STATE_COMPLETE
      */
     @JsxGetter
     public String getReadyState() {
         return getDomNodeOrDie().getReadyState();
     }
 
     /**
      * Does nothing special anymore.
      *
      * @param type the type of events to capture
      * @see Window#captureEvents(String)
      */
     @JsxFunction
     public void captureEvents(final String type) {
         // Empty.
     }
 
     /**
      * Does nothing special anymore.
      *
      * @param type the type of events to capture
      * @see Window#releaseEvents(String)
      */
     @JsxFunction
     public void releaseEvents(final String type) {
         // Empty.
     }
 
     /**
      * Returns the value of the {@code alinkColor} property.
      * @return the value of the {@code alinkColor} property
      */
     @JsxGetter
     public String getAlinkColor() {
         final HTMLElement body = getBody();
         if (body instanceof HTMLBodyElement) {
             return ((HTMLBodyElement) body).getALink();
         }
         return null;
     }
 
     /**
      * Sets the value of the {@code alinkColor} property.
      * @param color the value of the {@code alinkColor} property
      */
     @JsxSetter
     public void setAlinkColor(final String color) {
         final HTMLElement body = getBody();
         if (body instanceof HTMLBodyElement) {
             ((HTMLBodyElement) body).setALink(color);
         }
     }
 
     /**
      * Returns the value of the {@code bgColor} property.
      * @return the value of the {@code bgColor} property
      * @see <a href="http://msdn.microsoft.com/en-us/library/ms533505.aspx">MSDN Documentation</a>
      */
     @JsxGetter
     public String getBgColor() {
         final HTMLElement body = getBody();
         if (body instanceof HTMLBodyElement) {
             return ((HTMLBodyElement) body).getBgColor();
         }
         return null;
     }
 
     /**
      * Sets the value of the {@code bgColor} property.
      * @param color the value of the {@code bgColor} property
      * @see <a href="http://msdn.microsoft.com/en-us/library/ms533505.aspx">MSDN Documentation</a>
      */
     @JsxSetter
     public void setBgColor(final String color) {
         final HTMLElement body = getBody();
         if (body instanceof HTMLBodyElement) {
             ((HTMLBodyElement) body).setBgColor(color);
         }
     }
 
     /**
      * Returns the value of the {@code fgColor} property.
      * @return the value of the {@code fgColor} property
      */
     @JsxGetter
     public String getFgColor() {
         final HTMLElement body = getBody();
         if (body instanceof HTMLBodyElement) {
             return ((HTMLBodyElement) body).getText();
         }
         return null;
     }
 
     /**
      * Sets the value of the {@code fgColor} property.
      * @param color the value of the {@code fgColor} property
      */
     @JsxSetter
     public void setFgColor(final String color) {
         final HTMLElement body = getBody();
         if (body instanceof HTMLBodyElement) {
             ((HTMLBodyElement) body).setText(color);
         }
     }
 
     /**
      * Returns the value of the {@code linkColor} property.
      * @return the value of the {@code linkColor} property
      */
     @JsxGetter
     public String getLinkColor() {
         final HTMLElement body = getBody();
         if (body instanceof HTMLBodyElement) {
             return ((HTMLBodyElement) body).getLink();
         }
         return null;
     }
 
     /**
      * Sets the value of the {@code linkColor} property.
      * @param color the value of the {@code linkColor} property
      */
     @JsxSetter
     public void setLinkColor(final String color) {
         final HTMLElement body = getBody();
         if (body instanceof HTMLBodyElement) {
             ((HTMLBodyElement) body).setLink(color);
         }
     }
 
     /**
      * Returns the value of the {@code vlinkColor} property.
      * @return the value of the {@code vlinkColor} property
      */
     @JsxGetter
     public String getVlinkColor() {
         final HTMLElement body = getBody();
         if (body instanceof HTMLBodyElement) {
             return ((HTMLBodyElement) body).getVLink();
         }
         return null;
     }
 
     /**
      * Sets the value of the {@code vlinkColor} property.
      * @param color the value of the {@code vlinkColor} property
      */
     @JsxSetter
     public void setVlinkColor(final String color) {
         final HTMLElement body = getBody();
         if (body instanceof HTMLBodyElement) {
             ((HTMLBodyElement) body).setVLink(color);
         }
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     @JsxGetter
     public Element getLastElementChild() {
         return super.getLastElementChild();
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     @JsxGetter
     public Element getFirstElementChild() {
         return super.getFirstElementChild();
     }
 
     /**
      * Returns the {@code xmlEncoding} property.
      * @return the {@code xmlEncoding} property
      */
     @JsxGetter({CHROME, EDGE})
     public String getXmlEncoding() {
         return getPage().getXmlEncoding();
     }
 
     /**
      * Returns the {@code xmlStandalone} property.
      * @return the {@code xmlStandalone} property
      */
     @JsxGetter({CHROME, EDGE})
     public boolean isXmlStandalone() {
         return getPage().getXmlStandalone();
     }
 
     /**
      * Returns the {@code xmlVersion} property.
      * @return the {@code xmlVersion} property
      */
     @JsxGetter({CHROME, EDGE})
     public String getXmlVersion() {
         return getPage().getXmlVersion();
     }
 
     /**
      * Returns the {@code onabort} event handler for this element.
      * @return the {@code onabort} event handler for this element
      */
     @JsxGetter
     public Function getOnabort() {
         return getEventHandler(Event.TYPE_ABORT);
     }
 
     /**
      * Sets the {@code onabort} event handler for this element.
      * @param onabort the {@code onabort} event handler for this element
      */
     @JsxSetter
     public void setOnabort(final Object onabort) {
         setEventHandler(Event.TYPE_ABORT, onabort);
     }
 
     /**
      * Returns the {@code onauxclick} event handler for this element.
      * @return the {@code onauxclick} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnauxclick() {
         return getEventHandler(Event.TYPE_AUXCLICK);
     }
 
     /**
      * Sets the {@code onauxclick} event handler for this element.
      * @param onauxclick the {@code onauxclick} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnauxclick(final Object onauxclick) {
         setEventHandler(Event.TYPE_AUXCLICK, onauxclick);
     }
 
     /**
      * Returns the {@code onbeforecopy} event handler for this element.
      * @return the {@code onbeforecopy} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnbeforecopy() {
         return getEventHandler(Event.TYPE_BEFORECOPY);
     }
 
     /**
      * Sets the {@code onbeforecopy} event handler for this element.
      * @param onbeforecopy the {@code onbeforecopy} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnbeforecopy(final Object onbeforecopy) {
         setEventHandler(Event.TYPE_BEFORECOPY, onbeforecopy);
     }
 
     /**
      * Returns the {@code onbeforecut} event handler for this element.
      * @return the {@code onbeforecut} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnbeforecut() {
         return getEventHandler(Event.TYPE_BEFORECUT);
     }
 
     /**
      * Sets the {@code onbeforecut} event handler for this element.
      * @param onbeforecut the {@code onbeforecut} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnbeforecut(final Object onbeforecut) {
         setEventHandler(Event.TYPE_BEFORECUT, onbeforecut);
     }
 
     /**
      * Returns the {@code onbeforepaste} event handler for this element.
      * @return the {@code onbeforepaste} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnbeforepaste() {
         return getEventHandler(Event.TYPE_BEFOREPASTE);
     }
 
     /**
      * Sets the {@code onbeforepaste} event handler for this element.
      * @param onbeforepaste the {@code onbeforepaste} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnbeforepaste(final Object onbeforepaste) {
         setEventHandler(Event.TYPE_BEFOREPASTE, onbeforepaste);
     }
 
     /**
      * Returns the {@code oncancel} event handler for this element.
      * @return the {@code oncancel} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOncancel() {
         return getEventHandler(Event.TYPE_CANCEL);
     }
 
     /**
      * Sets the {@code oncancel} event handler for this element.
      * @param oncancel the {@code oncancel} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOncancel(final Object oncancel) {
         setEventHandler(Event.TYPE_CANCEL, oncancel);
     }
 
     /**
      * Returns the {@code oncanplay} event handler for this element.
      * @return the {@code oncanplay} event handler for this element
      */
     @JsxGetter
     public Function getOncanplay() {
         return getEventHandler(Event.TYPE_CANPLAY);
     }
 
     /**
      * Sets the {@code oncanplay} event handler for this element.
      * @param oncanplay the {@code oncanplay} event handler for this element
      */
     @JsxSetter
     public void setOncanplay(final Object oncanplay) {
         setEventHandler(Event.TYPE_CANPLAY, oncanplay);
     }
 
     /**
      * Returns the {@code oncanplaythrough} event handler for this element.
      * @return the {@code oncanplaythrough} event handler for this element
      */
     @JsxGetter
     public Function getOncanplaythrough() {
         return getEventHandler(Event.TYPE_CANPLAYTHROUGH);
     }
 
     /**
      * Sets the {@code oncanplaythrough} event handler for this element.
      * @param oncanplaythrough the {@code oncanplaythrough} event handler for this element
      */
     @JsxSetter
     public void setOncanplaythrough(final Object oncanplaythrough) {
         setEventHandler(Event.TYPE_CANPLAYTHROUGH, oncanplaythrough);
     }
 
     /**
      * Returns the {@code onchange} event handler for this element.
      * @return the {@code onchange} event handler for this element
      */
     @JsxGetter
     public Function getOnchange() {
         return getEventHandler(Event.TYPE_CHANGE);
     }
 
     /**
      * Sets the {@code onchange} event handler for this element.
      * @param onchange the {@code onchange} event handler for this element
      */
     @JsxSetter
     public void setOnchange(final Object onchange) {
         setEventHandler(Event.TYPE_CHANGE, onchange);
     }
 
     /**
      * Returns the {@code onclose} event handler for this element.
      * @return the {@code onclose} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnclose() {
         return getEventHandler(Event.TYPE_CLOSE);
     }
 
     /**
      * Sets the {@code onclose} event handler for this element.
      * @param onclose the {@code onclose} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnclose(final Object onclose) {
         setEventHandler(Event.TYPE_CLOSE, onclose);
     }
 
     /**
      * Returns the {@code oncopy} event handler for this element.
      * @return the {@code oncopy} event handler for this element
      */
     @JsxGetter
     public Function getOncopy() {
         return getEventHandler(Event.TYPE_COPY);
     }
 
     /**
      * Sets the {@code oncopy} event handler for this element.
      * @param oncopy the {@code oncopy} event handler for this element
      */
     @JsxSetter
     public void setOncopy(final Object oncopy) {
         setEventHandler(Event.TYPE_COPY, oncopy);
     }
 
     /**
      * Returns the {@code oncuechange} event handler for this element.
      * @return the {@code oncuechange} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOncuechange() {
         return getEventHandler(Event.TYPE_CUECHANGE);
     }
 
     /**
      * Sets the {@code oncuechange} event handler for this element.
      * @param oncuechange the {@code oncuechange} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOncuechange(final Object oncuechange) {
         setEventHandler(Event.TYPE_CUECHANGE, oncuechange);
     }
 
     /**
      * Returns the {@code oncut} event handler for this element.
      * @return the {@code oncut} event handler for this element
      */
     @JsxGetter
     public Function getOncut() {
         return getEventHandler(Event.TYPE_CUT);
     }
 
     /**
      * Sets the {@code oncut} event handler for this element.
      * @param oncut the {@code oncut} event handler for this element
      */
     @JsxSetter
     public void setOncut(final Object oncut) {
         setEventHandler(Event.TYPE_CUT, oncut);
     }
 
     /**
      * Returns the {@code ondrag} event handler for this element.
      * @return the {@code ondrag} event handler for this element
      */
     @JsxGetter
     public Function getOndrag() {
         return getEventHandler(Event.TYPE_DRAG);
     }
 
     /**
      * Sets the {@code ondrag} event handler for this element.
      * @param ondrag the {@code ondrag} event handler for this element
      */
     @JsxSetter
     public void setOndrag(final Object ondrag) {
         setEventHandler(Event.TYPE_DRAG, ondrag);
     }
 
     /**
      * Returns the {@code ondragend} event handler for this element.
      * @return the {@code ondragend} event handler for this element
      */
     @JsxGetter
     public Function getOndragend() {
         return getEventHandler(Event.TYPE_DRAGEND);
     }
 
     /**
      * Sets the {@code ondragend} event handler for this element.
      * @param ondragend the {@code ondragend} event handler for this element
      */
     @JsxSetter
     public void setOndragend(final Object ondragend) {
         setEventHandler(Event.TYPE_DRAGEND, ondragend);
     }
 
     /**
      * Returns the {@code ondragenter} event handler for this element.
      * @return the {@code ondragenter} event handler for this element
      */
     @JsxGetter
     public Function getOndragenter() {
         return getEventHandler(Event.TYPE_DRAGENTER);
     }
 
     /**
      * Sets the {@code ondragenter} event handler for this element.
      * @param ondragenter the {@code ondragenter} event handler for this element
      */
     @JsxSetter
     public void setOndragenter(final Object ondragenter) {
         setEventHandler(Event.TYPE_DRAGENTER, ondragenter);
     }
 
     /**
      * Returns the {@code ondragleave} event handler for this element.
      * @return the {@code ondragleave} event handler for this element
      */
     @JsxGetter
     public Function getOndragleave() {
         return getEventHandler(Event.TYPE_DRAGLEAVE);
     }
 
     /**
      * Sets the {@code ondragleave} event handler for this element.
      * @param ondragleave the {@code ondragleave} event handler for this element
      */
     @JsxSetter
     public void setOndragleave(final Object ondragleave) {
         setEventHandler(Event.TYPE_DRAGLEAVE, ondragleave);
     }
 
     /**
      * Returns the {@code ondragover} event handler for this element.
      * @return the {@code ondragover} event handler for this element
      */
     @JsxGetter
     public Function getOndragover() {
         return getEventHandler(Event.TYPE_DRAGOVER);
     }
 
     /**
      * Sets the {@code ondragover} event handler for this element.
      * @param ondragover the {@code ondragover} event handler for this element
      */
     @JsxSetter
     public void setOndragover(final Object ondragover) {
         setEventHandler(Event.TYPE_DRAGOVER, ondragover);
     }
 
     /**
      * Returns the {@code ondragstart} event handler for this element.
      * @return the {@code ondragstart} event handler for this element
      */
     @JsxGetter
     public Function getOndragstart() {
         return getEventHandler(Event.TYPE_DRAGSTART);
     }
 
     /**
      * Sets the {@code ondragstart} event handler for this element.
      * @param ondragstart the {@code ondragstart} event handler for this element
      */
     @JsxSetter
     public void setOndragstart(final Object ondragstart) {
         setEventHandler(Event.TYPE_DRAGSTART, ondragstart);
     }
 
     /**
      * Returns the {@code ondrop} event handler for this element.
      * @return the {@code ondrop} event handler for this element
      */
     @JsxGetter
     public Function getOndrop() {
         return getEventHandler(Event.TYPE_DROP);
     }
 
     /**
      * Sets the {@code ondrop} event handler for this element.
      * @param ondrop the {@code ondrop} event handler for this element
      */
     @JsxSetter
     public void setOndrop(final Object ondrop) {
         setEventHandler(Event.TYPE_DROP, ondrop);
     }
 
     /**
      * Returns the {@code ondurationchange} event handler for this element.
      * @return the {@code ondurationchange} event handler for this element
      */
     @JsxGetter
     public Function getOndurationchange() {
         return getEventHandler(Event.TYPE_DURATIONCHANGE);
     }
 
     /**
      * Sets the {@code ondurationchange} event handler for this element.
      * @param ondurationchange the {@code ondurationchange} event handler for this element
      */
     @JsxSetter
     public void setOndurationchange(final Object ondurationchange) {
         setEventHandler(Event.TYPE_DURATIONCHANGE, ondurationchange);
     }
 
     /**
      * Returns the {@code onemptied} event handler for this element.
      * @return the {@code onemptied} event handler for this element
      */
     @JsxGetter
     public Function getOnemptied() {
         return getEventHandler(Event.TYPE_EMPTIED);
     }
 
     /**
      * Sets the {@code onemptied} event handler for this element.
      * @param onemptied the {@code onemptied} event handler for this element
      */
     @JsxSetter
     public void setOnemptied(final Object onemptied) {
         setEventHandler(Event.TYPE_EMPTIED, onemptied);
     }
 
     /**
      * Returns the {@code onended} event handler for this element.
      * @return the {@code onended} event handler for this element
      */
     @JsxGetter
     public Function getOnended() {
         return getEventHandler(Event.TYPE_ENDED);
     }
 
     /**
      * Sets the {@code onended} event handler for this element.
      * @param onended the {@code onended} event handler for this element
      */
     @JsxSetter
     public void setOnended(final Object onended) {
         setEventHandler(Event.TYPE_ENDED, onended);
     }
 
     /**
      * Returns the {@code ongotpointercapture} event handler for this element.
      * @return the {@code ongotpointercapture} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOngotpointercapture() {
         return getEventHandler(Event.TYPE_GOTPOINTERCAPTURE);
     }
 
     /**
      * Sets the {@code ongotpointercapture} event handler for this element.
      * @param ongotpointercapture the {@code ongotpointercapture} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOngotpointercapture(final Object ongotpointercapture) {
         setEventHandler(Event.TYPE_GOTPOINTERCAPTURE, ongotpointercapture);
     }
 
     /**
      * Returns the {@code oninvalid} event handler for this element.
      * @return the {@code oninvalid} event handler for this element
      */
     @JsxGetter
     public Function getOninvalid() {
         return getEventHandler(Event.TYPE_INVALID);
     }
 
     /**
      * Sets the {@code oninvalid} event handler for this element.
      * @param oninvalid the {@code oninvalid} event handler for this element
      */
     @JsxSetter
     public void setOninvalid(final Object oninvalid) {
         setEventHandler(Event.TYPE_INVALID, oninvalid);
     }
 
     /**
      * Returns the {@code onload} event handler for this element.
      * @return the {@code onload} event handler for this element
      */
     @JsxGetter
     public Function getOnload() {
         return getEventHandler(Event.TYPE_LOAD);
     }
 
     /**
      * Sets the {@code onload} event handler for this element.
      * @param onload the {@code onload} event handler for this element
      */
     @JsxSetter
     public void setOnload(final Object onload) {
         setEventHandler(Event.TYPE_LOAD, onload);
     }
 
     /**
      * Returns the {@code onloadeddata} event handler for this element.
      * @return the {@code onloadeddata} event handler for this element
      */
     @JsxGetter
     public Function getOnloadeddata() {
         return getEventHandler(Event.TYPE_LOADEDDATA);
     }
 
     /**
      * Sets the {@code onloadeddata} event handler for this element.
      * @param onloadeddata the {@code onloadeddata} event handler for this element
      */
     @JsxSetter
     public void setOnloadeddata(final Object onloadeddata) {
         setEventHandler(Event.TYPE_LOADEDDATA, onloadeddata);
     }
 
     /**
      * Returns the {@code onloadedmetadata} event handler for this element.
      * @return the {@code onloadedmetadata} event handler for this element
      */
     @JsxGetter
     public Function getOnloadedmetadata() {
         return getEventHandler(Event.TYPE_LOADEDMETADATA);
     }
 
     /**
      * Sets the {@code onloadedmetadata} event handler for this element.
      * @param onloadedmetadata the {@code onloadedmetadata} event handler for this element
      */
     @JsxSetter
     public void setOnloadedmetadata(final Object onloadedmetadata) {
         setEventHandler(Event.TYPE_LOADEDMETADATA, onloadedmetadata);
     }
 
     /**
      * Returns the {@code onloadstart} event handler for this element.
      * @return the {@code onloadstart} event handler for this element
      */
     @JsxGetter
     public Function getOnloadstart() {
         return getEventHandler(Event.TYPE_LOAD_START);
     }
 
     /**
      * Sets the {@code onloadstart} event handler for this element.
      * @param onloadstart the {@code onloadstart} event handler for this element
      */
     @JsxSetter
     public void setOnloadstart(final Object onloadstart) {
         setEventHandler(Event.TYPE_LOAD_START, onloadstart);
     }
 
     /**
      * Returns the {@code onlostpointercapture} event handler for this element.
      * @return the {@code onlostpointercapture} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnlostpointercapture() {
         return getEventHandler(Event.TYPE_LOSTPOINTERCAPTURE);
     }
 
     /**
      * Sets the {@code onlostpointercapture} event handler for this element.
      * @param onlostpointercapture the {@code onlostpointercapture} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnlostpointercapture(final Object onlostpointercapture) {
         setEventHandler(Event.TYPE_LOSTPOINTERCAPTURE, onlostpointercapture);
     }
 
     /**
      * Returns the {@code onmouseenter} event handler for this element.
      * @return the {@code onmouseenter} event handler for this element
      */
     @JsxGetter
     public Function getOnmouseenter() {
         return getEventHandler(Event.TYPE_MOUDEENTER);
     }
 
     /**
      * Sets the {@code onmouseenter} event handler for this element.
      * @param onmouseenter the {@code onmouseenter} event handler for this element
      */
     @JsxSetter
     public void setOnmouseenter(final Object onmouseenter) {
         setEventHandler(Event.TYPE_MOUDEENTER, onmouseenter);
     }
 
     /**
      * Returns the {@code onmouseleave} event handler for this element.
      * @return the {@code onmouseleave} event handler for this element
      */
     @JsxGetter
     public Function getOnmouseleave() {
         return getEventHandler(Event.TYPE_MOUSELEAVE);
     }
 
     /**
      * Sets the {@code onmouseleave} event handler for this element.
      * @param onmouseleave the {@code onmouseleave} event handler for this element
      */
     @JsxSetter
     public void setOnmouseleave(final Object onmouseleave) {
         setEventHandler(Event.TYPE_MOUSELEAVE, onmouseleave);
     }
 
     /**
      * Returns the {@code onmousewheel} event handler for this element.
      * @return the {@code onmousewheel} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnmousewheel() {
         return getEventHandler(Event.TYPE_MOUSEWHEEL);
     }
 
     /**
      * Sets the {@code onmousewheel} event handler for this element.
      * @param onmousewheel the {@code onmousewheel} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnmousewheel(final Object onmousewheel) {
         setEventHandler(Event.TYPE_MOUSEWHEEL, onmousewheel);
     }
 
     /**
      * Returns the {@code onpaste} event handler for this element.
      * @return the {@code onpaste} event handler for this element
      */
     @JsxGetter
     public Function getOnpaste() {
         return getEventHandler(Event.TYPE_PASTE);
     }
 
     /**
      * Sets the {@code onpaste} event handler for this element.
      * @param onpaste the {@code onpaste} event handler for this element
      */
     @JsxSetter
     public void setOnpaste(final Object onpaste) {
         setEventHandler(Event.TYPE_PASTE, onpaste);
     }
 
     /**
      * Returns the {@code onpause} event handler for this element.
      * @return the {@code onpause} event handler for this element
      */
     @JsxGetter
     public Function getOnpause() {
         return getEventHandler(Event.TYPE_PAUSE);
     }
 
     /**
      * Sets the {@code onpause} event handler for this element.
      * @param onpause the {@code onpause} event handler for this element
      */
     @JsxSetter
     public void setOnpause(final Object onpause) {
         setEventHandler(Event.TYPE_PAUSE, onpause);
     }
 
     /**
      * Returns the {@code onplay} event handler for this element.
      * @return the {@code onplay} event handler for this element
      */
     @JsxGetter
     public Function getOnplay() {
         return getEventHandler(Event.TYPE_PLAY);
     }
 
     /**
      * Sets the {@code onplay} event handler for this element.
      * @param onplay the {@code onplay} event handler for this element
      */
     @JsxSetter
     public void setOnplay(final Object onplay) {
         setEventHandler(Event.TYPE_PLAY, onplay);
     }
 
     /**
      * Returns the {@code onplaying} event handler for this element.
      * @return the {@code onplaying} event handler for this element
      */
     @JsxGetter
     public Function getOnplaying() {
         return getEventHandler(Event.TYPE_PLAYING);
     }
 
     /**
      * Sets the {@code onplaying} event handler for this element.
      * @param onplaying the {@code onplaying} event handler for this element
      */
     @JsxSetter
     public void setOnplaying(final Object onplaying) {
         setEventHandler(Event.TYPE_PLAYING, onplaying);
     }
 
     /**
      * Returns the {@code onpointercancel} event handler for this element.
      * @return the {@code onpointercancel} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnpointercancel() {
         return getEventHandler(Event.TYPE_POINTERCANCEL);
     }
 
     /**
      * Sets the {@code onpointercancel} event handler for this element.
      * @param onpointercancel the {@code onpointercancel} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnpointercancel(final Object onpointercancel) {
         setEventHandler(Event.TYPE_POINTERCANCEL, onpointercancel);
     }
 
     /**
      * Returns the {@code onpointerdown} event handler for this element.
      * @return the {@code onpointerdown} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnpointerdown() {
         return getEventHandler(Event.TYPE_POINTERDOWN);
     }
 
     /**
      * Sets the {@code onpointerdown} event handler for this element.
      * @param onpointerdown the {@code onpointerdown} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnpointerdown(final Object onpointerdown) {
         setEventHandler(Event.TYPE_POINTERDOWN, onpointerdown);
     }
 
     /**
      * Returns the {@code onpointerenter} event handler for this element.
      * @return the {@code onpointerenter} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnpointerenter() {
         return getEventHandler(Event.TYPE_POINTERENTER);
     }
 
     /**
      * Sets the {@code onpointerenter} event handler for this element.
      * @param onpointerenter the {@code onpointerenter} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnpointerenter(final Object onpointerenter) {
         setEventHandler(Event.TYPE_POINTERENTER, onpointerenter);
     }
 
     /**
      * Returns the {@code onpointerleave} event handler for this element.
      * @return the {@code onpointerleave} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnpointerleave() {
         return getEventHandler(Event.TYPE_POINTERLEAVE);
     }
 
     /**
      * Sets the {@code onpointerleave} event handler for this element.
      * @param onpointerleave the {@code onpointerleave} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnpointerleave(final Object onpointerleave) {
         setEventHandler(Event.TYPE_POINTERLEAVE, onpointerleave);
     }
 
     /**
      * Returns the {@code onpointerlockchange} event handler for this element.
      * @return the {@code onpointerlockchange} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnpointerlockchange() {
         return getEventHandler(Event.TYPE_POINTERLOCKCHANGE);
     }
 
     /**
      * Sets the {@code onpointerlockchange} event handler for this element.
      * @param onpointerlockchange the {@code onpointerlockchange} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnpointerlockchange(final Object onpointerlockchange) {
         setEventHandler(Event.TYPE_POINTERLOCKCHANGE, onpointerlockchange);
     }
 
     /**
      * Returns the {@code onpointerlockerror} event handler for this element.
      * @return the {@code onpointerlockerror} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnpointerlockerror() {
         return getEventHandler(Event.TYPE_POINTERLOCKERROR);
     }
 
     /**
      * Sets the {@code onpointerlockerror} event handler for this element.
      * @param onpointerlockerror the {@code onpointerlockerror} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnpointerlockerror(final Object onpointerlockerror) {
         setEventHandler(Event.TYPE_POINTERLOCKERROR, onpointerlockerror);
     }
 
     /**
      * Returns the {@code onpointermove} event handler for this element.
      * @return the {@code onpointermove} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnpointermove() {
         return getEventHandler(Event.TYPE_POINTERMOVE);
     }
 
     /**
      * Sets the {@code onpointermove} event handler for this element.
      * @param onpointermove the {@code onpointermove} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnpointermove(final Object onpointermove) {
         setEventHandler(Event.TYPE_POINTERMOVE, onpointermove);
     }
 
     /**
      * Returns the {@code onpointerout} event handler for this element.
      * @return the {@code onpointerout} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnpointerout() {
         return getEventHandler(Event.TYPE_POINTEROUT);
     }
 
     /**
      * Sets the {@code onpointerout} event handler for this element.
      * @param onpointerout the {@code onpointerout} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnpointerout(final Object onpointerout) {
         setEventHandler(Event.TYPE_POINTEROUT, onpointerout);
     }
 
     /**
      * Returns the {@code onpointerover} event handler for this element.
      * @return the {@code onpointerover} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnpointerover() {
         return getEventHandler(Event.TYPE_POINTEROVER);
     }
 
     /**
      * Sets the {@code onpointerover} event handler for this element.
      * @param onpointerover the {@code onpointerover} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnpointerover(final Object onpointerover) {
         setEventHandler(Event.TYPE_POINTEROVER, onpointerover);
     }
 
     /**
      * Returns the {@code onpointerup} event handler for this element.
      * @return the {@code onpointerup} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnpointerup() {
         return getEventHandler(Event.TYPE_POINTERUP);
     }
 
     /**
      * Sets the {@code onpointerup} event handler for this element.
      * @param onpointerup the {@code onpointerup} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnpointerup(final Object onpointerup) {
         setEventHandler(Event.TYPE_POINTERUP, onpointerup);
     }
 
     /**
      * Returns the {@code onprogress} event handler for this element.
      * @return the {@code onprogress} event handler for this element
      */
     @JsxGetter
     public Function getOnprogress() {
         return getEventHandler(Event.TYPE_PROGRESS);
     }
 
     /**
      * Sets the {@code onprogress} event handler for this element.
      * @param onprogress the {@code onprogress} event handler for this element
      */
     @JsxSetter
     public void setOnprogress(final Object onprogress) {
         setEventHandler(Event.TYPE_PROGRESS, onprogress);
     }
 
     /**
      * Returns the {@code onratechange} event handler for this element.
      * @return the {@code onratechange} event handler for this element
      */
     @JsxGetter
     public Function getOnratechange() {
         return getEventHandler(Event.TYPE_RATECHANGE);
     }
 
     /**
      * Sets the {@code onratechange} event handler for this element.
      * @param onratechange the {@code onratechange} event handler for this element
      */
     @JsxSetter
     public void setOnratechange(final Object onratechange) {
         setEventHandler(Event.TYPE_RATECHANGE, onratechange);
     }
 
     /**
      * Returns the {@code onreadystatechange} event handler for this element.
      * @return the {@code onreadystatechange} event handler for this element
      */
     @JsxGetter
     public Function getOnreadystatechange() {
         return getEventHandler(Event.TYPE_READY_STATE_CHANGE);
     }
 
     /**
      * Sets the {@code onreadystatechange} event handler for this element.
      * @param onreadystatechange the {@code onreadystatechange} event handler for this element
      */
     @JsxSetter
     public void setOnreadystatechange(final Object onreadystatechange) {
         setEventHandler(Event.TYPE_READY_STATE_CHANGE, onreadystatechange);
     }
 
     /**
      * Returns the {@code onreset} event handler for this element.
      * @return the {@code onreset} event handler for this element
      */
     @JsxGetter
     public Function getOnreset() {
         return getEventHandler(Event.TYPE_RESET);
     }
 
     /**
      * Sets the {@code onreset} event handler for this element.
      * @param onreset the {@code onreset} event handler for this element
      */
     @JsxSetter
     public void setOnreset(final Object onreset) {
         setEventHandler(Event.TYPE_RESET, onreset);
     }
 
     /**
      * Returns the {@code onscroll} event handler for this element.
      * @return the {@code onscroll} event handler for this element
      */
     @JsxGetter
     public Function getOnscroll() {
         return getEventHandler(Event.TYPE_SCROLL);
     }
 
     /**
      * Sets the {@code onscroll} event handler for this element.
      * @param onscroll the {@code onscroll} event handler for this element
      */
     @JsxSetter
     public void setOnscroll(final Object onscroll) {
         setEventHandler(Event.TYPE_SCROLL, onscroll);
     }
 
     /**
      * Returns the {@code onsearch} event handler for this element.
      * @return the {@code onsearch} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnsearch() {
         return getEventHandler(Event.TYPE_SEARCH);
     }
 
     /**
      * Sets the {@code onsearch} event handler for this element.
      * @param onsearch the {@code onsearch} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnsearch(final Object onsearch) {
         setEventHandler(Event.TYPE_SEARCH, onsearch);
     }
 
     /**
      * Returns the {@code onseeked} event handler for this element.
      * @return the {@code onseeked} event handler for this element
      */
     @JsxGetter
     public Function getOnseeked() {
         return getEventHandler(Event.TYPE_SEEKED);
     }
 
     /**
      * Sets the {@code onseeked} event handler for this element.
      * @param onseeked the {@code onseeked} event handler for this element
      */
     @JsxSetter
     public void setOnseeked(final Object onseeked) {
         setEventHandler(Event.TYPE_SEEKED, onseeked);
     }
 
     /**
      * Returns the {@code onseeking} event handler for this element.
      * @return the {@code onseeking} event handler for this element
      */
     @JsxGetter
     public Function getOnseeking() {
         return getEventHandler(Event.TYPE_SEEKING);
     }
 
     /**
      * Sets the {@code onseeking} event handler for this element.
      * @param onseeking the {@code onseeking} event handler for this element
      */
     @JsxSetter
     public void setOnseeking(final Object onseeking) {
         setEventHandler(Event.TYPE_SEEKING, onseeking);
     }
 
     /**
      * Returns the {@code onselect} event handler for this element.
      * @return the {@code onselect} event handler for this element
      */
     @JsxGetter
     public Function getOnselect() {
         return getEventHandler(Event.TYPE_SELECT);
     }
 
     /**
      * Sets the {@code onselect} event handler for this element.
      * @param onselect the {@code onselect} event handler for this element
      */
     @JsxSetter
     public void setOnselect(final Object onselect) {
         setEventHandler(Event.TYPE_SELECT, onselect);
     }
 
     /**
      * Returns the {@code onselectionchange} event handler for this element.
      * @return the {@code onselectionchange} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnselectionchange() {
         return getEventHandler(Event.TYPE_SELECTIONCHANGE);
     }
 
     /**
      * Sets the {@code onselectionchange} event handler for this element.
      * @param onselectionchange the {@code onselectionchange} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnselectionchange(final Object onselectionchange) {
         setEventHandler(Event.TYPE_SELECTIONCHANGE, onselectionchange);
     }
 
     /**
      * Returns the {@code onselectstart} event handler for this element.
      * @return the {@code onselectstart} event handler for this element
      */
     @JsxGetter
     public Function getOnselectstart() {
         return getEventHandler(Event.TYPE_SELECTSTART);
     }
 
     /**
      * Sets the {@code onselectstart} event handler for this element.
      * @param onselectstart the {@code onselectstart} event handler for this element
      */
     @JsxSetter
     public void setOnselectstart(final Object onselectstart) {
         setEventHandler(Event.TYPE_SELECTSTART, onselectstart);
     }
 
     /**
      * Returns the {@code onstalled} event handler for this element.
      * @return the {@code onstalled} event handler for this element
      */
     @JsxGetter
     public Function getOnstalled() {
         return getEventHandler(Event.TYPE_STALLED);
     }
 
     /**
      * Sets the {@code onstalled} event handler for this element.
      * @param onstalled the {@code onstalled} event handler for this element
      */
     @JsxSetter
     public void setOnstalled(final Object onstalled) {
         setEventHandler(Event.TYPE_STALLED, onstalled);
     }
 
     /**
      * Returns the {@code onsubmit} event handler for this element.
      * @return the {@code onsubmit} event handler for this element
      */
     @JsxGetter
     public Function getOnsubmit() {
         return getEventHandler(Event.TYPE_SUBMIT);
     }
 
     /**
      * Sets the {@code onsubmit} event handler for this element.
      * @param onsubmit the {@code onsubmit} event handler for this element
      */
     @JsxSetter
     public void setOnsubmit(final Object onsubmit) {
         setEventHandler(Event.TYPE_SUBMIT, onsubmit);
     }
 
     /**
      * Returns the {@code onsuspend} event handler for this element.
      * @return the {@code onsuspend} event handler for this element
      */
     @JsxGetter
     public Function getOnsuspend() {
         return getEventHandler(Event.TYPE_SUSPEND);
     }
 
     /**
      * Sets the {@code onsuspend} event handler for this element.
      * @param onsuspend the {@code onsuspend} event handler for this element
      */
     @JsxSetter
     public void setOnsuspend(final Object onsuspend) {
         setEventHandler(Event.TYPE_SUSPEND, onsuspend);
     }
 
     /**
      * Returns the {@code ontimeupdate} event handler for this element.
      * @return the {@code ontimeupdate} event handler for this element
      */
     @JsxGetter
     public Function getOntimeupdate() {
         return getEventHandler(Event.TYPE_TIMEUPDATE);
     }
 
     /**
      * Sets the {@code ontimeupdate} event handler for this element.
      * @param ontimeupdate the {@code ontimeupdate} event handler for this element
      */
     @JsxSetter
     public void setOntimeupdate(final Object ontimeupdate) {
         setEventHandler(Event.TYPE_TIMEUPDATE, ontimeupdate);
     }
 
     /**
      * Returns the {@code ontoggle} event handler for this element.
      * @return the {@code ontoggle} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOntoggle() {
         return getEventHandler(Event.TYPE_TOGGLE);
     }
 
     /**
      * Sets the {@code ontoggle} event handler for this element.
      * @param ontoggle the {@code ontoggle} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOntoggle(final Object ontoggle) {
         setEventHandler(Event.TYPE_TOGGLE, ontoggle);
     }
 
     /**
      * Returns the {@code onvolumechange} event handler for this element.
      * @return the {@code onvolumechange} event handler for this element
      */
     @JsxGetter
     public Function getOnvolumechange() {
         return getEventHandler(Event.TYPE_VOLUMECHANGE);
     }
 
     /**
      * Sets the {@code onvolumechange} event handler for this element.
      * @param onvolumechange the {@code onvolumechange} event handler for this element
      */
     @JsxSetter
     public void setOnvolumechange(final Object onvolumechange) {
         setEventHandler(Event.TYPE_VOLUMECHANGE, onvolumechange);
     }
 
     /**
      * Returns the {@code onwaiting} event handler for this element.
      * @return the {@code onwaiting} event handler for this element
      */
     @JsxGetter
     public Function getOnwaiting() {
         return getEventHandler(Event.TYPE_WAITING);
     }
 
     /**
      * Sets the {@code onwaiting} event handler for this element.
      * @param onwaiting the {@code onwaiting} event handler for this element
      */
     @JsxSetter
     public void setOnwaiting(final Object onwaiting) {
         setEventHandler(Event.TYPE_WAITING, onwaiting);
     }
 
     /**
      * Returns the {@code onwebkitfullscreenchange} event handler for this element.
      * @return the {@code onwebkitfullscreenchange} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnwebkitfullscreenchange() {
         return getEventHandler(Event.TYPE_WEBKITFULLSCREENCHANGE);
     }
 
     /**
      * Sets the {@code onwebkitfullscreenchange} event handler for this element.
      * @param onwebkitfullscreenchange the {@code onwebkitfullscreenchange} event handler for this element
      */
     @JsxSetter({CHROME, EDGE})
     public void setOnwebkitfullscreenchange(final Object onwebkitfullscreenchange) {
         setEventHandler(Event.TYPE_WEBKITFULLSCREENCHANGE, onwebkitfullscreenchange);
     }
 
     /**
      * Returns the {@code onwebkitfullscreenerror} event handler for this element.
      * @return the {@code onwebkitfullscreenerror} event handler for this element
      */
     @JsxGetter({CHROME, EDGE})
     public Function getOnwebkitfullscreenerror() {
         return getEventHandler(Event.TYPE_WEBKITFULLSCREENERROR);
     }
 
     /**
      * Sets the {@code onwebkitfullscreenerror} event handler for this element.
      * @param onwebkitfullscreenerror the {@code onwebkitfullscreenerror} event handler for this element
      */
     @JsxSetter
     public void setOnwebkitfullscreenerror(final Object onwebkitfullscreenerror) {
         setEventHandler(Event.TYPE_WEBKITFULLSCREENERROR, onwebkitfullscreenerror);
     }
 
     /**
      * Returns the {@code onwheel} event handler for this element.
      * @return the {@code onwheel} event handler for this element
      */
     @JsxGetter
     public Function getOnwheel() {
         return getEventHandler(Event.TYPE_WHEEL);
     }
 
     /**
      * Sets the {@code onwheel} event handler for this element.
      * @param onwheel the {@code onwheel} event handler for this element
      */
     @JsxSetter
     public void setOnwheel(final Object onwheel) {
         setEventHandler(Event.TYPE_WHEEL, onwheel);
     }
 
     /**
      * Returns the {@code onafterscriptexecute} event handler for this element.
      * @return the {@code onafterscriptexecute} event handler for this element
      */
     @JsxGetter({FF, FF_ESR})
     public Function getOnafterscriptexecute() {
         return getEventHandler(Event.TYPE_AFTERSCRIPTEXECUTE);
     }
 
     /**
      * Sets the {@code onafterscriptexecute} event handler for this element.
      * @param onafterscriptexecute the {@code onafterscriptexecute} event handler for this element
      */
     @JsxSetter({FF, FF_ESR})
     public void setOnafterscriptexecute(final Object onafterscriptexecute) {
         setEventHandler(Event.TYPE_AFTERSCRIPTEXECUTE, onafterscriptexecute);
     }
 
     /**
      * Returns the {@code onbeforescriptexecute} event handler for this element.
      * @return the {@code onbeforescriptexecute} event handler for this element
      */
     @JsxGetter({FF, FF_ESR})
     public Function getOnbeforescriptexecute() {
         return getEventHandler(Event.TYPE_BEFORESCRIPTEXECUTE);
     }
 
     /**
      * Sets the {@code onbeforescriptexecute} event handler for this element.
      * @param onbeforescriptexecute the {@code onbeforescriptexecute} event handler for this element
      */
     @JsxSetter({FF, FF_ESR})
     public void setOnbeforescriptexecute(final Object onbeforescriptexecute) {
         setEventHandler(Event.TYPE_BEFORESCRIPTEXECUTE, onbeforescriptexecute);
     }
 
     /**
      * Returns the {@code onmozfullscreenchange} event handler for this element.
      * @return the {@code onmozfullscreenchange} event handler for this element
      */
     @JsxGetter({FF, FF_ESR})
     public Function getOnmozfullscreenchange() {
         return getEventHandler(Event.TYPE_MOZFULLSCREENCHANGE);
     }
 
     /**
      * Sets the {@code onmozfullscreenchange} event handler for this element.
      * @param onmozfullscreenchange the {@code onmozfullscreenchange} event handler for this element
      */
     @JsxSetter({FF, FF_ESR})
     public void setOnmozfullscreenchange(final Object onmozfullscreenchange) {
         setEventHandler(Event.TYPE_MOZFULLSCREENCHANGE, onmozfullscreenchange);
     }
 
     /**
      * Returns the {@code onmozfullscreenerror} event handler for this element.
      * @return the {@code onmozfullscreenerror} event handler for this element
      */
     @JsxGetter({FF, FF_ESR})
     public Function getOnmozfullscreenerror() {
         return getEventHandler(Event.TYPE_MOZFULLSCREENERROR);
     }
 
     /**
      * Sets the {@code onmozfullscreenerror} event handler for this element.
      * @param onmozfullscreenerror the {@code onmozfullscreenerror} event handler for this element
      */
     @JsxSetter({FF, FF_ESR})
     public void setOnmozfullscreenerror(final Object onmozfullscreenerror) {
         setEventHandler(Event.TYPE_MOZFULLSCREENERROR, onmozfullscreenerror);
     }
 
     /**
      * @return the {@code currentScript}
      */
     @JsxGetter
     public ScriptableObject getCurrentScript() {
         return currentScript_;
     }
 
     /**
      * @param script the {@code currentScript}
      */
     public void setCurrentScript(final ScriptableObject script) {
         currentScript_ = script;
     }
 
     /**
      * @return the {@code FontFaceSet}
      */
     @JsxGetter
     public ScriptableObject getFonts() {
         if (fonts_ == null) {
             final FontFaceSet fonts = new FontFaceSet();
             fonts.setParentScope(getWindow());
             fonts.setPrototype(getPrototype(fonts.getClass()));
             fonts_ = fonts;
         }
         return fonts_;
     }
 
     /**
      * Returns the value of the {@code all} property.
      * @return the value of the {@code all} property
      */
     @JsxGetter
     public HTMLCollection getAll() {
         final HTMLCollection all = new HTMLAllCollection(getDomNodeOrDie());
         all.setAvoidObjectDetection(true);
         all.setIsMatchingPredicate((Predicate<DomNode> & Serializable) node -> true);
         return all;
     }
 
     /**
      * Returns the element with the specified ID, as long as it is an HTML element; {@code null} otherwise.
      * @param id the ID to search for
      * @return the element with the specified ID, as long as it is an HTML element; {@code null} otherwise
      */
     @JsxFunction
     public HtmlUnitScriptable getElementById(final String id) {
         final DomNode domNode = getDomNodeOrDie();
         for (final DomElement descendant : domNode.getDomElementDescendants()) {
             if (id.equals(descendant.getId())) {
                 return descendant.getScriptableObject();
             }
         }
         return null;
     }
 
     /**
      * Creates a new ProcessingInstruction.
      * @param target the target
      * @param data the data
      * @return the new ProcessingInstruction
      */
     @JsxFunction
     public HtmlUnitScriptable createProcessingInstruction(final String target, final String data) {
         final ProcessingInstruction node = getPage().createProcessingInstruction(target, data);
         return getScriptableFor(node);
     }
 
     /**
      * Creates a new createCDATASection.
      * @param data the data
      * @return the new CDATASection
      */
     @JsxFunction
     public HtmlUnitScriptable createCDATASection(final String data) {
         final CDATASection node = getPage().createCDATASection(data);
         return getScriptableFor(node);
     }
 
     /**
      * Does... nothing.
      * @see <a href="https://developer.mozilla.org/en/DOM/document.clear">Mozilla doc</a>
      */
     @JsxFunction
     public void clear() {
         // nothing
     }
 
     /**
      * {@inheritDoc}
      */
     @JsxFunction
     @Override
     public boolean contains(final Object element) {
         return getDocumentElement().contains(element);
     }
 
     /**
      * Generate and return the URL for the given blob.
      * @param blob the Blob containing the data
      * @return the URL {@link org.htmlunit.javascript.host.URL#createObjectURL(Object)}
      */
     public String generateBlobUrl(final Blob blob) {
         final URL url = getPage().getUrl();
 
         String origin = "null";
         if (!UrlUtils.URL_ABOUT_BLANK.equals(url)) {
             origin = url.getProtocol() + "://" + url.getAuthority();
         }
 
         final String blobUrl = "blob:" + origin + "/" + UUID.randomUUID();
         blobUrl2Blobs_.put(blobUrl, blob);
         return blobUrl;
     }
 
     /**
      * @param url the url to resolve
      * @return the Blob for the given URL or {@code null} if not found.
      */
     public Blob resolveBlobUrl(final String url) {
         return blobUrl2Blobs_.get(url);
     }
 
     /**
      * Revokes the URL for the given blob.
      * @param url the url to revoke {@link org.htmlunit.javascript.host.URL#revokeObjectURL(Scriptable)}
      */
     public void revokeBlobUrl(final String url) {
         blobUrl2Blobs_.remove(url);
     }
 }