HTML DOM Attributes

The Attr Object

In the HTML DOM, an Attr object represents an HTML attribute.

An HTML attribute always belongs to an HTML element.

A NamedNodeMap is an array-like unordered collection of an element's attributes.

In other words: a NamedNodeMap is a list of Attr objects.

A NamedNodeMap has a length property that returns the number of nodes.

The nodes can be accessed by name or index numbers. The index starts at 0.

Property	Description
isId	Deprecated
name	Returns an attribute's name
value	Sets or returns an attribute's value
specified	Returns true if the attribute is specified

Method	Description
getNamedItem()	Returns an attribute node (by name) from a NamedNodeMap
item()	Returns an attribute node (by index) from a NamedNodeMap
length	Returns the number of attributes in a NamedNodeMap
removeNamedItem()	Removes an attribute (node)
setNamedItem()	Sets an attribute (node) by name