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createAttributeNS(namespaceURI, qualifiedName)
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const node = document.getElementById("svg");
const a = document.createAttributeNS("http://www.w3.org/2000/svg", "viewBox");
a.value = "0 0 100 100";
node.setAttributeNode(a);
console.log(node.getAttribute("viewBox")); // "0 0 100 100"
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