An object mapping string keys to values of type function or function[].
When used as the applySec in a call to apply, the keys are used as
selectors in calls to element.querySelectorAll (or
ruleSelectorAll if the element is an instance of HTMLStyleElement).
The functions will be mathced against the selected elements (or CSS rules)
at the same index.
An object mapping string keys to values of type function or function[]. When used as the
applySecin a call toapply, the keys are used as selectors in calls toelement.querySelectorAll(orruleSelectorAllif the element is an instance of HTMLStyleElement). The functions will be mathced against the selected elements (or CSS rules) at the same index.Example