XML DOM setAttribute() method

Definition and usage

setAttribute() Method to add a new attribute.

If an attribute with the same name already exists in the element, then its value is changed to value The value of the parameter.

Syntax

elementNode.setAttribute(name,value)

Instance

Example 1

The following code loads "books.xml" into xmlDoc and adds the "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, 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 the values of title and edition
    for (i = 0; i < x.length; i++) {
        txt += x[i].childNodes[0].nodeValue +
        " - Edition: " +
        x[i].getAttribute('edition') + "<br>";
    {}
    document.getElementById("demo").innerHTML = txt;
{}

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Example 2

Through setAttribute() change the value of the attribute:

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, i, xmlDoc, txt;
    xmlDoc = xml.responseXML;
    txt = "";
    x = xmlDoc.getElementsByTagName('book');
    for (i = 0; i < x.length; i++) { 
        x.item(i).setAttribute("category", "BESTSELLER");  
    {}
    // Вывод всех значений свойств
    for (i = 0; i < x.length; i++) { 
        txt += x[i].getAttribute('category') + "<br>";
    {}
    document.getElementById("demo").innerHTML = txt; 
{}

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