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.
js
createAttribute(name)
name is a 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.
js
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 Standard # dom-document-createattribute |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
createAttribute |
1 | 12 | 44
1–44The parameter was not converted to its lowercase variant. |
6 | ≤12.1 | 1 | 4.4 | 18 | 44
4–44The parameter was not converted to its lowercase variant. |
≤12.1 | 1 | 1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/Document/createAttribute