Classes :

• Classes are similar to functions, but it is not hoisted.
• Class syntax does not introduce an object model to JavaScript, but it is only syntactic sugar for existing prototype-based inheritance.
• The class body contains only methods, not properties. There are three types of methods

1**) Constructor method:**

• It is used for creating and initialising objects.
• A class contains only a single constructor method.

2. Prototype method:

display(){ }

3. Static method: class-level method. You can access the class.

static display(){ }
ClassName.display()

Inheritance :

In a child class, there is no constructor method at that time; it will invoke the parent class constructor, even if it is either a default or parameterised constructor.

In the child class and parent class, there are constructors that time it will raise an error; to overcome this problem, through the "super" keyword.