Dealing with XML namespaces in JavaScript (DOM)

Question

I am building a tree (for SOAP) using DOM. I would like read the following info at a certain node:

Is an XML namespace already "imported" into the document (with xmlns:blah="http://...) - knowing the http://... part.
What moniker (in the above example blah) used.

Is there any way other than the manual: to walk chain of ancestors and iterate on attribute nodes, find any starting with xmlns: checking the value and if match return the rest of the attribute name?

J. K. · Accepted Answer · 2012-10-30 11:23:15Z

4

Aside the usual methods such as document.getElementsByTagName, DOM offers their namespaced versions: document.getElementsByTagNameNS

Such methods take the namespace URL as their first argument.

document.getElementsByTagNameNS('http://...', 'abc');

By the way, using the regular methods, the elements might be available as…

document.getElementsByTagName('xmlns\\:abc');

This works for me in case of a HTML DOM even without "importing" any namespace.

Update:

The method OP was looking for is document.lookupPrefix('http://...')

edited Oct 30, 2012 at 11:23

answered Oct 29, 2012 at 10:00

J. K.

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2 Comments

vbence Over a year ago

My problem is to find namesapces already imported (so I can import it if it is not already in the document). I have no knowledge about any tag names. - In other words I ofc. know the name of the tag I would like to insert but nothing guarantees that some other tag is not already used from the namesapce and thus the namesapce already imported.

J. K. Over a year ago

Oh, right. I read the question wrong. Have you tried doc.lookupPrefix('http://...')?

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