HTML DOM item() Method
Attribute ObjectExample
Get the name of the first attribute of a <button> element:
var x = document.getElementsByTagName("BUTTON")[0].attributes.item(0).nodeName;
The result of x could be:
onclick
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More "Try it Yourself" examples below.
Definition and Usage
The item() method returns the node at the specified index in a NamedNodeMap, as a Node object.
The nodes are sorted as they appear in the source code, and the index starts at 0.
Note: There are two ways to access an attribute node at the specified index in a NamedNodeMap:
This syntax:
document.getElementsByTagName("BUTTON")[0].attributes.item(1); // The
2nd attributeTry it
Will produce the same result as this syntax:
document.getElementsByTagName("BUTTON")[0].attributes[1]; // The
2nd attributeTry it
You can use whatever method you like, however, the most common method is [index].
Tip: Use the length property to return the number of nodes in a NamedNodeMap object.
Browser Support
| Method | |||||
|---|---|---|---|---|---|
| item() | Yes | Yes | Yes | Yes | Yes |
Syntax
namednodemap.item(index)
or simply:
namednodemap[index]
or simply:
namednodemap[index]
Parameter Values
| Parameter | Type | Description |
|---|---|---|
| index | Number | Required. The index of the node in the NamedNodeMap you want to return |
Technical Details
| Return Value: | A Node object, representing the attribute node at the specified index. Note: Returns null if the index number is out of range |
|---|---|
| DOM Version | Core Level 1 |
More Examples
Example
Change the value of a <button> element's second attribute:
document.getElementsByTagName("BUTTON")[0].attributes[1].value = "newClass";
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