Node.lookupNamespaceURI()

The Node.lookupNamespaceURI() method accepts a prefix and returns the namespace URI associated with it on the given node if found (and null if not).

Syntax

var namespace = node.lookupNamespaceURI(prefix);

Parameters

prefix
The prefix to look for. If this parameter is null, the method will return the default namespace URI, if any.

Return value

A DOMString containing the the namespace URI. If the prefix is not found, it returns null.

Specification

Browser compatibility

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DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
lookupNamespaceURIChrome Full support YesEdge Full support 12Firefox Full support YesIE ? Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown

In Firefox, due to bug 312019, this method does not work with dynamically assigned namespaces (i.e., those set with Node.prefix).