DOMTokenList.length

The length read-only property of the DOMTokenList interface is an integer representing the number of objects stored in the object.

Syntax

tokenList.length;

Value

An integer.

Examples

In the following example we retrieve the list of classes set on a <span> element as a DOMTokenList using Element.classList, then write the length of the list to the <span>'s Node.textContent.

First, the HTML:

<span class="a b c"></span>

Now the JavaScript:

var span = document.querySelector("span");
var classes = span.classList;
var length = classes.length;

span.textContent = 'classList length = ' + length;

The output looks like this:

Specifications

Specification Status Comment
DOM
The definition of 'length' in that specification.
Living Standard Initial definition

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes1250 ? Yes ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes ?50 Yes ? Yes

Document Tags and Contributors

 Contributors to this page: fscholz, chrisdavidmills, jpmedley
 Last updated by: fscholz,