Element: childElementCount プロパティ
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.
Element.childElementCount は読み取り専用のプロパティで、この要素の子要素の数を返します。
例
js
let sidebar = document.getElementById("sidebar");
if (sidebar.childElementCount > 0) {
// 何かを行う
}
仕様書
| Specification |
|---|
| DOM Standard # dom-parentnode-childelementcount |
ブラウザーの互換性
BCD tables only load in the browser