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.

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

Specification
DOM Standard
# ref-for-dom-mutationrecord-attributenamespace②

Browser compatibility

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