Document: createAttribute() method

{{ ApiRef("DOM") }}

The Document.createAttribute() method creates a new attribute node, and returns it. The object created is a node implementing the {{domxref("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.

Syntax

createAttribute(name)

Parameters

• name
  • : A string containing the name of the attribute.

Return value

An {{domxref("Attr")}} node.

Exceptions

• InvalidCharacterError {{domxref("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.

Examples

const node = document.getElementById("div1");
const a = document.createAttribute("my_attrib");
a.value = "newVal";
node.setAttributeNode(a);
console.log(node.getAttribute("my_attrib")); // "newVal"

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("Document.createAttributeNS()")}}
• {{domxref("Document.createElement()")}}
• {{domxref("Element.setAttribute()")}}
• {{domxref("Element.setAttributeNode()")}}