Example
Set a H1's class attribute:
var btn = document.getElementsByTagName("H1")[0];
var
typ = document.createAttribute("class");
typ.value = "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 NamedNodeMap.
If the node already exists, it will be replaced, and the replaced node will be the return value, otherwise the return value will be null.
Tip: Instead of working with attribute nodes, you could use the element.setAttribute() method to add an attribute with a value to an element.
Browser Support
| Method | |||||
|---|---|---|---|---|---|
| setNamedItem() | Yes | Yes | Yes | Yes | Yes |
Syntax
namednodemap.setNamedItem(node)
Parameter Values
| Parameter | Type | Description |
|---|---|---|
| node | Node object | Required. The node you want to add/replace in the NamedNodeMap collection |
Technical Details
| Return Value: | A Node object, representing the replaced node (if any), otherwise null |
|---|---|
| DOM Version | Core Level 1 |