The keyword in JavaScript classes serves an important role in enabling interaction between a subclass (child class) and its superclass (parent class). It is primarily used in two scenarios:
In a subclass, you use to call the constructor of the parent class. This ensures that the parent's initialization logic runs, allowing the child class to inherit and utilize properties defined in the parent class
If you don’t call super() in the subclass constructor, JavaScript will throw an error because the parent class constructor must be invoked.
super() must be called before accessing in the subclass constructor.
You use to call methods from the parent class within the subclass. This is useful when you want to extend or override functionality while still using the parent class's implementation.