Set to a list of attribute local names (without namespace) if not all attribute mutations need to be observed and attributes is true or omitted.

Set to true if attributes is true or omitted and target’s attribute value before the mutation needs to be recorded.

Set to true if mutations to target’s attributes are to be observed. Can be omitted if attributeOldValue and/or attributeFilter is specified.

Set to true if mutations to target’s data are to be observed. Can be omitted if characterDataOldValue is specified

Set to true if characterData is set to true or omitted and target’s data before the mutation needs to be recorded.

Set to true if mutations to target’s children are to be observed.

Set to true if mutations to not just target, but also target’s descendants are to be observed