The setAttributeNode() method adds a new Attr node to the specified element.


var replacedAttr = element.setAttributeNode(attribute);
  • attribute is the Attr node to set on the element.
  • replacedAttr is the replaced attribute node, if any, returned by this function.


This example copies the align attribute from one element to another.


<div id="one" align="left">one</div>
<div id="two">two</div>


let d1 = document.getElementById('one');
let d2 = document.getElementById('two');
let a = d1.getAttributeNode('align');


// Returns: 'left'


If the attribute named already exists on the element, that attribute is replaced with the new one and the replaced one is returned.

This method is seldom used, with Element.setAttribute() usually being used to change element's attributes.

DOM methods dealing with element's attributes:

Not namespace-aware, most commonly used methods Namespace-aware variants (DOM Level 2) DOM Level 1 methods for dealing with Attr nodes directly (seldom used) DOM Level 2 namespace-aware methods for dealing with Attr nodes directly (seldom used)
setAttribute (DOM 1) setAttributeNS setAttributeNode setAttributeNodeNS
getAttribute (DOM 1) getAttributeNS getAttributeNode getAttributeNodeNS
hasAttribute (DOM 2) hasAttributeNS - -
removeAttribute (DOM 1) removeAttributeNS removeAttributeNode -


DOM Level 2 Core: setAttributeNode (introduced in DOM Level 1 Core)

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support YesEdge ? Firefox ? IE ? Opera Full support YesSafari ? WebView Android Full support YesChrome Android Full support YesEdge Mobile ? Firefox Android ? Opera Android Full support YesSafari iOS ? Samsung Internet Android ?


Full support  
Full support
Compatibility unknown  
Compatibility unknown

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Last updated by: mfluehr,