HTML DOM length Property

## JavaScript Reference

Overview

## JavaScript Objects

JS Array JS Boolean JS Date JS Math JS Number JS String JS RegExp JS Global

## Browser Objects

Window Navigator Screen History Location

## HTML DOM Objects

DOM Document DOM Elements DOM Attributes DOM Events

## HTML Objects

DOM Anchor DOM Area DOM Base DOM Body DOM Button DOM Form DOM Frame/IFrame DOM Frameset DOM Image DOM Input Button DOM Input Checkbox DOM Input File DOM Input Hidden DOM Input Password DOM Input Radio DOM Input Reset DOM Input Submit DOM Input Text DOM Link DOM Meta DOM Object DOM Option DOM Select DOM Style DOM Table DOM td / th DOM tr DOM Textarea

# HTML DOM length Property

Attribute Object

## Example

Return the number of attributes of a button element:

document.getElementsByTagName("BUTTON")[0].attributes.length;

The result could be:

1
Try it yourself »

## Definition and Usage

The length property return the number of nodes in a collection.

A Node object's attributes is an example of a NamedNodeMap object

## Browser Support

The length property is supported in all major browsers.

Note: In Internet Explorer 8 and earlier, the length property for attributes will return the number of all possible attributes for an element.

## Syntax

namednodemap.length

## Technical Details

Return Value: | A Number, representing the number of nodes in the nodemap
DOM Version | Core Level 1

Attribute Object

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