NamedNodeMap: length property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
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
| Specification |
|---|
| DOM # dom-namednodemap-length |
Browser compatibility
| desktop | mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
length | ||||||||||||