Javascript has provided the getAttributeNode() method to find the attribute node with the specified name of an element, as an attribute object. If the attribute does not exist, the return value is null or an empty string ("").
syntax
element.getAttributeNode(attributename);
It returns the attribute object representing the specified attribute node
Example
In the following example, there are two heading tags with different classes. Those tags when accessed by the getAttributeNode() can return the attribute class with which they attached. It works the same as an array. We can access the multiple classes only by providing their index numbers.
<html>
<body>
<h2 class="class1">Tutorix</h2>
<h2 class="class2">Tutorialspoint</h2>
<p id = "attribute"></p>
<script>
var elmnt = document.getElementsByTagName("h2")[1];
var value = elmnt.getAttributeNode("class").value;
document.getElementById("attribute").innerHTML = value;
</script>
</body>
</html>Output
Tutorix Tutorialspoint class2