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DOMRectReadOnly: toJSON() メソッド - Web API | MDN
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DOMRectReadOnly: toJSON() メソッド
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2020年1月.
メモ: この機能はウェブワーカー内で利用可能です。
DOMRectReadOnly の toJSON() メソッドは、この DOMRectReadOnly オブジェクトの JSON 表現を返します。
構文
js
toJSON()
引数
なし。
返値
新しいオブジェクト。そのプロパティは、メソッドが呼び出された DOMRectReadOnly の値に設定されます。
例
この例では、位置 (10, 20)、幅 100、高さ 50 の矩形を表す DOMRectReadOnly を作成します。次に、toJSON() を呼び出して、矩形の JSON 表現を取得します。
js
const rect = new DOMRectReadOnly(10, 20, 100, 50);
const rectJSON = rect.toJSON();
console.log(rectJSON);
// 出力: { x: 10, y: 20, width: 100, height: 50, top: 20, right: 110, bottom: 70, left: 10 }
仕様書
| Specification |
|---|
| Geometry Interfaces Module Level 1 # dom-domrectreadonly-tojson |
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