The read-only length
property of the NamedNodeMap
interface is the number of objects stored in the map.
The read-only length
property of the NamedNodeMap
interface is the number of objects stored in the map.
A number containing the number of objects in the map
<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;
Specification |
---|
DOM Standard # dom-namednodemap-length |
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