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XML DOM setAttributeNode() Method

❮ Element Object

Example

The following code fragment loads "books.xml" into xmlDoc and adds a "edition" attribute to all <book> elements:

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

function myFunction(xml) {
    var x, y, z, i, newatt, xmlDoc, txt;
    xmlDoc = xml.responseXML;
    txt = "";
    x = xmlDoc.getElementsByTagName('book');
    for (i = 0; i < x.length; i++) {
        newatt = xmlDoc.createAttribute("edition");
        newatt.value = "first";
        x[i].setAttributeNode(newatt);
    }
    // Output all "edition" attribute values
    for (i = 0; i < x.length; i++) {
        txt += "Edition: " + x[i].getAttribute("edition") + "<br>";
    }
    document.getElementById("demo").innerHTML = txt;
}

Output:

Edition: first
Edition: first
Edition: first
Edition: first
Try it Yourself »

Definition and Usage

The setAttributeNode() method adds a new attribute node.

If an attribute with that name already exists in the element, it is replaced by the new one. If the new attribute replaces an existing attribute, the replaced attribute node is returned, otherwise it returns null.

Syntax

elementNode.setAttributeNode(att_node)

Parameter Description
att_node Required. Specifies the attribute node to set
❮ Element Object