NamedNodeMap

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

NamedNodeMap 介面表示了 Attr 物件的集合。雖然 NamedNodeMap 與 NodeList 都能如陣列一般透過索引訪問成員，但和 NodeList 不同的是，NamedNodeMap 中的成員並沒有順序。

NamedNodeMap 物件具有即時性（live），如果其內部成員（屬性節點物件）發生改變，NamedNodeMap 物件會自動更新至最新的狀態。

備註：僅管被稱作 NamedNodeMap，但本介面並不是直接用來處理節點物件（Node），而是專門負責屬性節點物件（Attr）。屬性節點是一種特殊的節點，在部分瀏覽器實作中依然存在。

This interface doesn't inherit any property.

This interface doesn't inherit any method.

NamedNodeMap.getNamedItem(): Returns a Attr, corresponding to the given name.
NamedNodeMap.setNamedItem(): Replaces, or adds, the Attr identified in the map by the given name.
NamedNodeMap.removeNamedItem(): Removes the Attr identified by the given map.
NamedNodeMap.item(): Returns the Attr at the given index, or null if the index is higher or equal to the number of nodes.
NamedNodeMap.getNamedItemNS(): Returns a Attr identified by a namespace and related local name.
NamedNodeMap.setNamedItemNS(): Replaces, or adds, the Attr identified in the map by the given namespace and related local name.
NamedNodeMap.removeNamedItemNS(): Removes the Attr identified by the given namespace and related local name.

Specification
DOM Standard # interface-namednodemap

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