Element

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本文深入探讨了DOM核心中的Element接口，包括属性、方法和DOM核心引用等内容。重点介绍了Element对象如何代表HTML或XML文档中的元素，以及如何通过属性和方法操作这些元素。

http://www.w3.org/wiki/DOM/domcore/Element

DOM/domcore/Element

< DOM‎ | domcore

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1 Element

Element

The Element interface represents an element in an HTML or XML document. Elements may have attributes associated with them; since the Element interface inherits from Node, the generic Node interface attribute attributes may be used to retrieve the set of all attributes for an element.

Attributes

Name	Description
`namespaceURI`	...
`prefix`	...
`localName`	...
`tagName`	Returns the name of the element.
`attributes`	...
`children`	...
`firstElementChild`	...
`lastElementChild`	...
`previousElementSibling`	...
`nextElementSibling`	...
`childElementCount`	...

Methods

Name	Description
`getAttribute(name)`	Retrieves an attribute value by name.
`getAttributeNS(namespace, localName)`	Retrieves an attribute value by local name and namespace URI.
`setAttribute(qualifiedName, value)`	Adds a new attribute.
`setAttributeNS(namespace, qualifiedName, value)`	Adds a new attribute.
`removeAttribute(qualifiedName)`	Removes an attribute by name.
`removeAttributeNS(namespace, localName)`	Removes an attribute by local name and namespace URI.
`hasAttribute(qualifiedName)`	Returns true when an attribute with a given name is specified on this element or has a default value, false otherwise.
`hasAttributeNS(namespace, localName)`	Returns true when an attribute with a given local name and namespace URI is specified on this element or has a default value, false otherwise.
`getElementsByTagName(qualifiedName)`	Returns a list of all descendant Elements with a given tag name, in document order.
`getElementsByTagNameNS(namespace, localName)`	Returns a list of all the descendant Elements with a given local name and namespace URI in document order.
`getElementsByClassName(classNames)`	Returns the Element that has an class attribute with the given value.