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hasAttributeNS method

Browser support:
9
Returns whether the current element has an attribute with the specified namespace and name or not.
Note: Internet Explorer supports the hasAttributeNS method from version 9, but only for HTML documents, not for XML documents.

Syntax:

object.hasAttributeNS (namespaceURI, attributeName);
You can find the related objects in the Supported by objects section below.

Parameters:

namespaceURI
Required. String that specifies the namespace URI of the attribute. The namespace URI is case-sensitive.
attributeName
Required. String that specifies the name of the attribute. The name is case-sensitive.

Return value:

Boolean. One of the following values:
false The current element has no attribute with the specified namespace and name.
true The current element has an attribute with the specified namespace and name.

Methods for attributes with namespaces:

Name Browser Description
createAttributeNS
9
Creates a new attribute node with the specified namespace and name.
getAttributeNS
9
Returns the value of the attribute with the specified namespace and name from the current element.
getAttributeNodeNS
9
Returns the attribute node with the specified namespace and name from the current element.
getNamedItemNS
9
Returns the attribute node with the specified namespace and name from the current attributes collection.
hasAttributeNS
9
Returns whether the current element has an attribute with the specified namespace and name or not.
removeAttributeNS
9
Removes the attribute with the specified namespace and name from the current element.
removeAttributeNode
Removes the specified attribute node from the current element.
removeNamedItemNS
9
Removes the attribute with the specified namespace and name from the current attributes collection and returns the removed attribute node.
setAttributeNS
9
Adds an attribute with the specified namespace, name and value to the current element.
setAttributeNodeNS
9
Adds the specified attribute node to the current element.
setNamedItemNS
9
Adds the specified attribute node to the current attributes collection.

Example HTML code 1:

This example illustrates the use of the hasAttributeNS method:
Code
ajax.js
ns.xml
<head>
    <script type="text/javascript" src="ajax.js"></script>
    
    <script type="text/javascript">
        var httpRequest = null;
        
        function SendRequest () {
            if (!httpRequest) {
                httpRequest = CreateHTTPRequestObject ();   // defined in ajax.js
            }
            if (httpRequest) {          
                    // The requested file must be in the same domain that the page is served from.
                var url = "ns.xml";
                httpRequest.open ("GET", url, true);    // async
                httpRequest.onreadystatechange = OnStateChange;
                httpRequest.send (null);
            }
        }

        function OnStateChange () {
            if (httpRequest.readyState == 0 || httpRequest.readyState == 4) {
                if (IsRequestSuccessful (httpRequest)) {    // defined in ajax.js
                    Test_HasAttributeNS ();
                }
                else {
                    alert ("Operation failed.");
                }
            }
        }

        function Test_HasAttributeNS () {
            var xmlDoc = ParseHTTPResponse (httpRequest);   // defined in ajax.js
            if (!xmlDoc)
                return;
                
            var itemTags = xmlDoc.getElementsByTagName ("item");
            var firstItem = itemTags[0];
            if (firstItem.hasAttributeNS) {
                if (firstItem.hasAttributeNS ("http://help.dottoro.com/NS", "color")) {
                    alert ("First item tag has a 'color' attribute!");
                } else {
                    alert ("First item tag doesn't have a 'color' attribute!");
                }
            }
            else {
                alert ("Your browser doesn't support the hasAttributeNS method.");
            }
        }

    </script>
</head>
<body>
    <button onclick="SendRequest ()">Test hasAttributeNS method</button>
</body>
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