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Showing content from https://webplatform.github.io/docs/dom/NamedNodeMap/setNamedItem below:

setNamedItem · WebPlatform Docs

setNamedItem Summary

Adds an attribute to an element by using an attributes collection.

Method of dom/NamedNodeMap dom/NamedNodeMap

Syntax

var object = object.setNamedItem();

Parameters ppNode

Data-type: any

attribute

Return Value

Returns an object of type DOM NodeDOM Node

IHTMLDOMAttribute

attribute

attribute

Examples

The following example shows how to add an attribute to an element using the setNamedItem method.

<html>
<head>
<title>setNamedItem example</title>
<script>
function fnSetNamedItem(){
var nnm = myDIV.attributes;
var namedItem = document.createAttribute("title");
namedItem.value = "This is a ToolTip";
nnm.setNamedItem(namedItem);
}
</script>
</head>
<body onload="fnSetNamedItem();">
<div id="myDIV">This DIV now has a ToolTip.</div>
</body>
</html>

View live example

Notes Remarks

An attribute that is set with this method does not have to apply to the element. If an attribute with the same name is already present, it is replaced by the new attribute. setNamedItem was introduced in Microsoft Internet Explorer 6.

Syntax Standards information

Document Object Model (DOM) Level 3 Core Specification, Section 1.4

Attributions

Mozilla Developer Network : [NamedNodeMap Article]
Microsoft Developer Network: [setNamedItem Method Article]

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