Detects any function type, which is ... not only the typeof operator
returns the 'function' string for the operated value, but the latter
also features both of a function's call methods call and apply.
This method is essential and safe.
Parameters
Optionalvalue: any
An optionally passed value of any type.
Returns valueisFunction
A boolean value which indicates whether
the tested type is any kind of function.
Detects any function type, which is ... not only the
typeofoperator returns the'function'string for the operatedvalue, but the latter also features both of a function's call methodscallandapply.This method is essential and safe.