Element: childElementCount 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.

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The Element.childElementCount read-only property returns the number of child elements of this element.

Examples

let sidebar = document.getElementById("sidebar");
if (sidebar.childElementCount > 0) {
  // Do something
}

Specification
DOM # dom-parentnode-childelementcount