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XML DOM lookupNamespaceURI() Method

❮ Element Object

Example

The following code fragment loads "books_ns.xml" into xmlDoc and finds the namespace URI for the given "c" prefix:

var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
   if (this.readyState == 4 && this.status == 200) {
       myFunction(this);
   }
};
xhttp.open("GET", "books_ns.xml", true);
xhttp.send();

function myFunction(xml) {
    var xmlDoc = xml.responseXML;
    var x = xmlDoc.getElementsByTagName("book")[0];
    document.getElementById("demo").innerHTML =
    x.lookupNamespaceURI("c");
}

Output:

https://www.w3schools.com/children/
Try it Yourself »

Definition and Usage

The lookupNamespaceURI() method returns the namespace matching the specified prefix on the current node.

Syntax

elementNode.lookupNamespaceURI(prefix)

Parameter Description
prefix Required. A string that specifies prefix to find
❮ Element Object