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HTML | DOM setAttributeNode() Method

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  • Last Updated : 10 Aug, 2022
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The setAttributeNode() method in HTML DOM is used to add the specified attribute node to an element. If the specified attribute is already present, then this method replaces it. 



Parameter: Onll one parameter is accepted name.Where name is the attribute node to be added. It is the required field. 

Return Value: This method returns an attribute object which represents the replaced attribute node otherwise it returns null.



<!DOCTYPE html>
      HTML DOM setAttributeNode Method
        .gfg {
            color: green;
<body style="text-align: center;">
    <h1 style="color:green;">
       DOM setAttributeNode Method
    <p id="p">
        A computer science portal for geeks.
    <button onclick="Geeks()">
        Click Here!
        function Geeks() {
            //Get the paragraph to add attribute.
            var doc = document.getElementById("p");
            //Creating a class attribute.
            var attr = document.createAttribute("class");
            //Setting the value of class attribute.
            attr.value = "gfg";
            //Adding class attribute to paragraph.


Before click on the button:


After click on the button:


Supported Browsers: The browser supported by setAttributeNode() method are listed below:

  • Google Chrome 1
  • Edge 12
  • Internet Explorer 6
  • Firefox 1
  • Opera 12.1
  • Safari 1

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