Attr
The Attr interface represents one of an element's attributes as an object. In most situations, you will directly retrieve the attribute value as a string (e.g., Element.getAttribute()), but some cases may require interacting with Attr instances (e.g., Element.getAttributeNode()).
Properties
node is a CDATASection node.
The read-only childNodes property of the Node interface returns a live NodeList of child nodes of the given element where the first child node is assigned index 0. Child nodes include elements, text and comments.
node is a Comment node.
node is a DocumentFragment node.
node is a document.
Set when other is a descendant of node.
Set when other is an ancestor of node.
Set when node and other are not in the same tree.
Set when other is following node.
Set when other is preceding node.
node is a doctype.
node is an element.
The read-only firstChild property of the Node interface returns the node's first child in the tree, or null if the node has no children.
The read-only isConnected property of the Node interface returns a boolean indicating whether the node is connected (directly or indirectly) to a Document object.
The read-only localName property of the Attr interface returns the local part of the qualified name of an attribute, that is the name of the attribute, stripped from any namespace in front of it. For example, if the qualified name is xml:lang, the returned local name is lang, if the element supports that namespace.
The read-only name property of the Attr interface returns the qualified name of an attribute, that is the name of the attribute, with the namespace prefix, if any, in front of it. For example, if the local name is lang and the namespace prefix is xml, the returned qualified name is xml:lang.
The read-only namespaceURI property of the Attr interface returns the namespace URI of the attribute, or null if the element is not in a namespace.
The read-only nextSibling property of the Node interface returns the node immediately following the specified one in their parent's childNodes, or returns null if the specified node is the last child in the parent element.
The read-only ownerDocument property of the Node interface returns the top-level document object of the node.
The read-only ownerElement property of the Attr interface returns the Element the attribute belongs to.
The read-only parentElement property of Node interface returns the DOM node's parent Element, or null if the node either has no parent, or its parent isn't a DOM Element. Node.parentNode on the other hand returns any kind of parent, regardless of its type.
The read-only parentNode property of the Node interface returns the parent of the specified node in the DOM tree.
The read-only previousSibling property of the Node interface returns the node immediately preceding the specified one in its parent's childNodes list, or null if the specified node is the first in that list.
node is a ProcessingInstruction node.
Functions
The appendChild() method of the Node interface adds a node to the end of the list of children of a specified parent node.
The compareDocumentPosition() method of the Node interface reports the position of its argument node relative to the node on which it is called.
The getRootNode() method of the Node interface returns the context object's root, which optionally includes the shadow root if it is available.
The hasChildNodes() method of the Node interface returns a boolean value indicating whether the given Node has child nodes or not.
The isDefaultNamespace() method of the Node interface accepts a namespace URI as an argument. It returns a boolean value that is true if the namespace is the default namespace on the given node and false if not. The default namespace can be retrieved with Node.lookupNamespaceURI() by passing null as the argument.
The isEqualNode() method of the Node interface tests whether two nodes are equal. Two nodes are equal when they have the same type, defining characteristics (for elements, this would be their ID, number of children, and so forth), its attributes match, and so on. The specific set of data points that must match varies depending on the types of the nodes.
The isSameNode() method of the Node interface is a legacy alias the for the === strict equality operator. That is, it tests whether two nodes are the same (in other words, whether they reference the same object).
The lookupNamespaceURI() method of the Node interface takes a prefix as parameter and returns the namespace URI associated with it on the given node if found (and null if not). This method's existence allows Node objects to be passed as a namespace resolver to XPathEvaluator.createExpression() and XPathEvaluator.evaluate().
The lookupPrefix() method of the Node interface returns a string containing the prefix for a given namespace URI, if present, and null if not. When multiple prefixes are possible, the first prefix is returned.
The removeChild() method of the Node interface removes a child node from the DOM and returns the removed node.