Validation API
isDef()
Validates that the passed arguments are not undefined.
- Accepts any arguments.
- Returns true if all provided arguments pass the validation, otherwise, returns false.
Example:
isDef('book');
// true
isDef(0, '', [], {});
// true
isDef(null, false);
// true
isDef(undefined);
// false
isDef(1, 'book', undefined);
// false