HTML DOM setAttributeNode() Method

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# HTML DOM setAttributeNode() Method

Element Object

## Example

Set the class attribute node of a header element:

var atr=document.createAttribute("class");
atr.nodeValue="democlass";
document.getElementsByTagName("H1")[0].setAttributeNode(atr);

Before setting the attribute node:

# Hello World

After setting the attribute node:

# Hello World

Try it yourself »

## Definition and Usage

The setAttributeNode() method adds the specified attribute node to an element.

If the specified attribute allready exists, this method replaces it.

## Browser Support

The setAttributeNode() method is supported in all major browsers.

## Syntax

element.setAttributeNode(attributenode)

## Parameters

Parameter | Type | Description
--- | --- | ---
attributenode | Attr object | Required. The attribute node you want to add

## Return Value

Type | Description
--- | ---
Attr object | The replaced attribute node, if any, otherwise null

## Technical Details

DOM Version | Core Level 1 Element Object

Element Object

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