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
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome Full support Yes | Edge ? | Firefox Full support Yes | IE ? | Opera ? | Safari ? | WebView Android Full support Yes | Chrome Android Full support Yes | Edge Mobile ? | Firefox Android Full support Yes | Opera Android ? | Safari iOS ? | Samsung 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).