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The ParentNode.childElementCount read-only property returns an unsigned long representing the number of child elements of the given element.
This property was initially defined in the ElementTraversal pure interface. As this interface contained two distinct set of properties, one aimed at Node that have children, one at those that are children, they have been moved into two separate pure interfaces, ParentNode and ChildNode. In this case, childElementCount moved to ParentNode. This is a fairly technical change that shouldn't affect compatibility.
Syntax
var elCount = elementNodeReference.childElementCount;
Polyfill for Internet Explorer 8
This property is unsupported prior to IE9, so the following snippet can be used to add support to IE8:
// Source: https://github.com/Alhadis/Snippets/blob/master/js/polyfills/IE8-child-elements.js
if(!("childElementCount" in document.documentElement)){
Object.defineProperty(Element.prototype, "childElementCount", {
get: function(){
for(var c = 0, nodes = this.children, n, i = 0, l = nodes.length; i < l; ++i)
(n = nodes[i], 1 === n.nodeType) && ++c;
return c;
}
});
}
Specification
| Specification | Status | Comment |
|---|---|---|
| DOM The definition of 'ParentNode.childElementCount' in that specification. |
Living Standard | Splitted the ElementTraversal interface in ChildNode and ParentNode. This method is now defined on the latter.The Document and DocumentFragment implemented the new interfaces. |
| Element Traversal Specification The definition of 'ElementTraversal.childElementCount' in that specification. |
Recommendation | Added its initial definition to the ElementTraversal pure interface and use it on Element. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
Basic support (on Element) |
1.0 | 3.5 (1.9.1) | 9.0 | 10.0 | 4.0 |
Support on Document and DocumentFragment |
29.0 | 25.0 (25.0) | Not supported | 16.0 | Not supported |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
Basic support (on Element) |
(Yes) | 1.0 (1.9.1) | (Yes) | (Yes) | (Yes) |
Support on Document and DocumentFragment |
(Yes) | 25.0 (25.0) | Not supported | 16.0 | Not supported |
See also
- The
ParentNodeandChildNodepure interfaces.