Returns the local name of the changed attribute, or null.
Returns the local name of the changed attribute, or null.
MDN
Returns the namespace of the changed attribute, or null.
Returns the namespace of the changed attribute, or null.
MDN
Return the next sibling of the added or removed nodes, or null.
Return the next sibling of the added or removed nodes, or null.
MDN
The return value depends on the type.
The return value depends on the type. For attributes, it is the value of the changed attribute before the change. For characterData, it is the data of the changed node before the change. For childList, it is null.
MDN
Return the previous sibling of the added or removed nodes, or null.
Return the previous sibling of the added or removed nodes, or null.
MDN
https://www.w3.org/TR/dom/#mutationrecord
https://dom.spec.whatwg.org/#mutationrecord