HTML DOM setNamedItem() Method

## JavaScript Reference

Overview

## JavaScript Objects

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## Browser Objects

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## HTML DOM Objects

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## HTML Objects

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# HTML DOM setNamedItem() Method

Attribute Object

## Example

Set a H1's class attribute:

var btn=document.getElementsByTagName("h1")[0];
var typ=document.createAttribute("class");
typ.nodeValue="democlass";
btn.attributes.setNamedItem(typ);

Before setting the attribute:

# Hello world

After setting the attribute:

# Hello world

Try it yourself »

## Definition and Usage

The setNamedItem() method adds the specified node to the nodeMap.

If the node allready exists, it will be replaced, and the replaced node will be the return value, otherwise the return value will be null.

## Browser Support

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

## Syntax

namednodemap.setNamedItem(node)

## Parameters

Parameter | Type | Description
--- | --- | ---
node | Node object | Required. The node you want to add/replace in the namedNodeMap collection

## Return Value

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

## Technical Details

DOM Version | Core Level 1

Attribute Object

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