MutationRecord: attributeNamespace property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

• Learn more
• See full compatibility
• Report feedback

The MutationRecord read-only property attributeNamespace is the namespace of the mutated attribute in the MutationRecord observed by a MutationObserver.

Value

If the record's type is attributes, the property is a string representing the namespace of the mutated attribute of the mutation target. The value is null otherwise.

Specifications

Browser compatibility