dom / latest / namednodemap / length.html /

NamedNodeMap.length

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

<pre zero="test" one="test" two="test"></pre>
const pre = document.getElementsByTagName("pre")[0];
const attrMap = pre.attributes;

let result = "The `test` attribute contains " + attrMap.length + " attributes.\n";

pre.textContent = result;

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
1
18
4
≤12.1
1
1.0

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https://developer.mozilla.org/en-US/docs/Web/API/NamedNodeMap/length