What are abstract classes?

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Accepted Answer

Abstract classes cannot be instantiated directly. They can implement methods of their own. They can define methods that inheriting classes must implement. They are primarily used for inheritance, allowing other classes to extend from them. Abstract methods or properties: Abstract classes typically include one or more abstract methods or property declarations. Inheritance: Other classes derive from abstract classes to share common functionality. No direct instantiation: You cannot create an instance of an abstract class directly. abstract class Person {
    name: string;

constructor(name: string) {
        this.name = name;
    }

display(): void {
        console.log(this.name);
    }

abstract find(name: string): Person;
}
 A property name. A normal method display(). An abstract method find(name: string): Person. class Employee extends Person {
    empCode: number;

constructor(name: string, code: number) {
        super(name); // Call super() to initialize base class
        this.empCode = code;
    }

find(name: string): Person {
        // Execute AJAX request to find an employee from a database
        return new Employee(name, 1);
    }
}

let emp: Person = new Employee("James", 100);
emp.display(); // Output: "James"

let emp2: Person = emp.find('Steve');
 Employee derives from Person. Employee must implement the find() method defined in Person. The abstract class enforces a contract that derived classes must fulfill. When implementing an abstract class, the derived class must call super() in its constructor. Abstract classes can also include abstract properties. Remember, abstract classes provide a powerful way to structure and share functionality while ensuring adherence to a specific contract.

What are abstract classes?

An abstract class is a base class from which other classes can be derived. An abstract class serves as a foundational blueprint for creating more concrete classes.

What are abstract classes?

An abstract class is a base class from which other classes can be derived. An abstract class serves as a foundational blueprint for creating more concrete classes.

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