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Document: createAttributeNS() メソッド - Web API | MDN
createAttributeNS(namespaceURI, qualifiedName)
namespaceURI
-
文字列で、属性に関連付ける名前空間 URI を指定します。
作成する属性の namespaceURI
プロパティは、namespaceURI
の値で初期化されます。
有効な名前空間 URI を参照してください。
qualifiedName
-
文字列で、作成する属性の名前を指定します。
作成する属性の name
プロパティは qualifiedName
の値で初期化されます。
NamespaceError
DOMException
-
namespaceURI
の値が有効な namespace URI ではない場合に発生します。
InvalidCharacterError
DOMException
-
qualifiedName
値が有効な XML 名ではない場合に発生します。例えば、数字、ハイフン、ピリオドで始まったり、英数字、アンダースコア、ハイフン、ピリオド以外の文字を含んでいたりする場合です。
- HTML
-
https://www.w3.org/1999/xhtml
- SVG
-
https://www.w3.org/2000/svg
- MathML
-
https://www.w3.org/1998/Math/MathML
const node = document.getElementById("svg");
const a = document.createAttributeNS("https://www.w3.org/2000/svg", "viewBox");
a.value = "0 0 100 100";
node.setAttributeNode(a);
console.log(node.getAttribute("viewBox")); // "0 0 100 100"