The read-only length
property of the NamedNodeMap
interface is the number of objects stored in the map.
NamedNodeMap.length
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
Specification |
---|
DOM Standard # dom-namednodemap-length |
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
|
© 2005–2021 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