This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The Element.childElementCount read-only property returns the number of child elements of this element.
let sidebar = document.getElementById("sidebar");
if (sidebar.childElementCount > 0) {
// Do something
}
| Specification |
|---|
| DOM> # dom-parentnode-childelementcount> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
childElementCount |
2 | 12 | 3.5 | 10 | 4 | 18 | 4 | 10.1 | 3 | 1.0 | 4.4 | 3 |
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https://developer.mozilla.org/en-US/docs/Web/API/Element/childElementCount