Lära Overriding Methods in Subclasses | Inheritance and Encapsulation

When working with classes in JavaScript, you often want subclasses to behave differently from their parent classes in certain situations. Method overriding allows you to redefine a method in a subclass, providing specialized behavior while keeping the same method name. This is a key feature of object-oriented programming and helps you create flexible and reusable code structures. By overriding a method, the subclass version is called instead of the parent's version when you use that method on an instance of the subclass. This is especially useful when the subclass represents a more specific concept that needs to act differently from the general parent class.


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class Animal {
  speak() {
    console.log("The animal makes a sound.");
  }
}

class Dog extends Animal {
  speak() {
    console.log("The dog barks.");
  }
}

const genericAnimal = new Animal();
genericAnimal.speak(); // The animal makes a sound.

const myDog = new Dog();
myDog.speak(); // The dog barks.

Var allt tydligt?

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Avsnitt 2. Kapitel 3

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              1234567891011121314151617
            
class Animal {
  speak() {
    console.log("The animal makes a sound.");
  }
}

class Dog extends Animal {
  speak() {
    console.log("The dog barks.");
  }
}

const genericAnimal = new Animal();
genericAnimal.speak(); // The animal makes a sound.

const myDog = new Dog();
myDog.speak(); // The dog barks.

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 2. Kapitel 3