This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The Document.createAttribute() method creates a new attribute node, and returns it. The object created is a node implementing the Attr interface. The DOM does not enforce what sort of attributes can be added to a particular element in this manner.
Note: The string given in parameter is converted to lowercase.
createAttribute(name)
nameA string containing the name of the attribute.
A Attr node.
InvalidCharacterError DOMException
Thrown if the name value is not a valid XML name; for example, it starts with a number, hyphen, or period, or contains characters other than alphanumeric characters, underscores, hyphens, or periods.
const node = document.getElementById("div1");
const a = document.createAttribute("my_attrib");
a.value = "newVal";
node.setAttributeNode(a);
console.log(node.getAttribute("my_attrib")); // "newVal"
| Specification |
|---|
| DOM> # dom-document-createattribute> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
createAttribute |
1 | 12 | 441–44The parameter was not converted to its lowercase variant. |
≤12.1 | 1 | 18 | 444–44The parameter was not converted to its lowercase variant. |
≤12.1 | 1 | 1.0 | 4.4 | 1 |
Document.createAttributeNS()Document.createElement()Element.setAttribute()Element.setAttributeNode()
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https://developer.mozilla.org/en-US/docs/Web/API/Document/createAttribute