Validation API
isFn()
Validates that the passed arguments are functions.
- Accepts any arguments.
- Returns true if all provided arguments pass the validation, otherwise, returns false.
Example:
isFn(function example() {});
// true
isFn(function example() {}, function example2() {});
// true
isFn({});
// false
isFn('book', []);
// false
isFn(function example() {}, {});
// false