Elem[] added

List of nodes added, or empyt list if no nodes added.

Str? attr

Name of the changed attribute, or null if no attribute was changed.

Str? attrNs

Namespace of the changed attribute, or null if no attribute was changed.

Elem? nextSibling

Next sibling of the added or removed nodes, or null if no nodes added or removed.

Str? oldVal

Old value, depending on type:

• For "attrs", it is the value of the changed attribute before the change
• For "charData", it is the data of the changed node before the change
• For "childList", it is null

Elem? prevSibling

Previous sibling of the added or removed nodes, or null if not nodes added or removed.

Elem[] removed

List of nodes removed, or empty list if no nodes removed.

Elem target

Target node that mutation affected, depending on the type:

• For "attrs", it is the element whose attribute changed
• For "charData", it is the CharacterData node
• For "childList", it is the node whose children changed

Str type

Mutation type:

• "attrs" if the mutation was an attribute mutation
• "charData" if it was a mutation to a CharacterData node
• "childList" if it was a mutation to the tree of nodes