The implementational details are hidden from the user, and only the features that satisfy their requirements are accessed. In the above code example, we achieved abstraction by creating a function/class manager that extends our abstract class Employee through the prototype chain (an important concept in JavaScript, through which inheritance is achieved). Manager.prototype=Object.create(Employee.prototype) Created an object of subclass (extending abstract class) Created a subclass (constructor function) Return "Employee name is: "+this.empName Throw new Error("You cannot create an instance of Abstract Class") We will create a subclass in Java, and our Employee will be the superclass. Now, extending the above example further, we will create another function that extends the properties and methods of our abstract class Employee. In the last line of the JavaScript, we create an object reference or an instance(employee) of our abstract class Employee to check whether the object is being created or an error is displayed through the display function. We have also created a display function to check the Employee’s name. In the above code scenario, we have created one constructor function, Employee, which acts as an abstract class. Method (function) of our abstract class Throw new Error("FYI: Instance of Abstract class cannot be instantiated") Created an abstract class (constructor function) Let us see some of the examples with the help of program code Example #1: Abstract Class Creation In the below example, we will code a few lines in JavaScript to check whether we can create an abstract class and see whether we can satisfy its properties or not.As in Java, we have the abstract keyword to make a class an abstract class there are no such reserve keywords in JavaScript to declare a class an abstract class.Abstract classes need to be inherited and require subclasses to provide implementations for the method declared in the abstract class. An abstract method is a method that can only be declared but has no implementation to it.Abstract classes can be defined as classes that cannot be instantiated, i.e., whose object reference cannot be created and contains one or more abstract methods within it.Let’s understand what abstract classes are. Before we dive into the implementation of abstract class in JavaScript. In the Abstract Classes in JavaScript blog post, we will discuss Abstract Classes in JavaScript.
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