Node.lookupNamespaceURI()
The lookupNamespaceURI()
method of the Node
interface
takes a prefix as parameter and returns the namespace URI associated with it on the given node if found (and
null
if not).
Syntax
lookupNamespaceURI(prefix);
Parameters
prefix
-
The prefix to look for.
Note: This parameter is not optional, but can be set to
null
.
Return value
A string containing the namespace URI corresponding to the prefix.
If the prefix is not found, it returns null
.
If the requested prefix
is null
, it returns the default namespace URI.
Example
Namespace URL for <code>xlink</code> on <output>: <output>Not tested</output>.<br/>
Namespace URL for <code>xml</code> on <output>: <output>Not tested</output>.<br/>
Namespace URL for <code>html</code> on <output>: <output>Not tested</output>.<br/>
Namespace URL for <code>``</code> on <output>: <output>Not tested</output>.<br/>
Namespace URL for <code>svg</code> on <svg>: <output>Not tested</output>.<br/>
Namespace URL for <code>xlink</code> on <svg>: <output>Not tested</output>.<br/>
Namespace URL for <code>xml</code> on <svg>: <output>Not tested</output>.<br/>
<svg xmlns:svg="http://www.w3.org/2000/svg" height="1"></svg>
<button>Click to see the results</button>
const button = document.getElementsByTagName('button')[0];
button.addEventListener("click", function () {
const aHtmlElt = document.getElementsByTagName('output')[0];
const aSvgElt = document.getElementsByTagName('svg')[0];
const result = document.getElementsByTagName('output');
result[0].value = aHtmlElt.lookupNamespaceURI("xlink");
result[1].value = aHtmlElt.lookupNamespaceURI("xml");
result[2].value = aHtmlElt.lookupNamespaceURI("html");
result[3].value = aHtmlElt.lookupNamespaceURI("");
result[4].value = aSvgElt.lookupNamespaceURI("svg");
result[5].value = aSvgElt.lookupNamespaceURI("xlink");
result[6].value = aSvgElt.lookupNamespaceURI("xml");
});
Specifications
Specification |
---|
DOM Standard # dom-node-lookupnamespaceuri |
Browser compatibility
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