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XML DOM setAttribute() Method

Element Object Reference

Example

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

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

function myFunction(xml) {
    var x, i, xmlDoc, txt;
    xmlDoc = xml.responseXML;
    txt = "";
    x = xmlDoc.getElementsByTagName('title');
    // Add a new attribute to each title element
    for (i = 0; i < x.length; i++) {
        x[i].setAttribute("edition", "first");
    }
    // Output titles and edition value
    for (i = 0; i < x.length; i++) {
        txt += x[i].childNodes[0].nodeValue +
        " - Edition: " +
        x[i].getAttribute('edition') + "<br>";
    }
    document.getElementById("demo").innerHTML = txt;
}

Output:

Everyday Italian - Edition: first
Harry Potter - Edition: first
XQuery Kick Start - Edition: first
Learning XML - Edition: first

Try it Yourself »

Definition and Usage

The setAttribute() method adds a new attribute.

If an attribute with that name already exists in the element, its value is changed to be that of the value parameter

Syntax

elementNode.setAttribute(name,value)

Parameter	Description
name	Required. Specifies the name of the attribute to set
value	Required. Specifies the value of the attribute to set

Try-It-Yourself Demos

setAttribute() - Change an attribute's value

Element Object Reference

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