W3cubDocs

/Web APIs

NamedNodeMap: length property

The read-only length property of the NamedNodeMap interface is the number of objects stored in the map.

Value

A number containing the number of objects in the map

Example

html

<pre zero="test" one="test" two="test"></pre>

js

const pre = document.querySelector("pre");
const attrMap = pre.attributes;
pre.textContent = `The 'test' attribute contains ${attrMap.length} attributes.\n`;

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
length 1 12 1 5 ≤12.1 1 4.4 18 4 ≤12.1 1 1.0

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/NamedNodeMap/length