JavaScript node.lookupPrefix() Method

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JavaScript node.lookupPrefix() Method

The node.lookupPrefix() method returns a DOMString containing the prefix for a given namespace URI, if present, and null if not.


The XML file used in the example: game.xml.

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<!DOCTYPE html> <html> <body> <p id="point"></p> <script> var x = document.getElementById("point"); var xhttp = new XMLHttpRequest(); xhttp.onreadystatechange = function(){ if(this.readyState == 4 && this.status == 200){ var xmlDoc = xhttp.responseXML; var xmlNode = xmlDoc.getElementsByTagName("game")[0]; x.innerHTML = xmlNode.lookupPrefix(""); } };"GET", "/game.xml", true); xhttp.send(); </script> </body> </html>



Parameter Values

namespaceURIRequiredSpecifies the namespace URI to look for.

Return Values

StringReturns a DOMString containing the prefix for a given namespace URI.
nullIf there is no prefix for a given namespace URI.


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