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Understanding JavaScript Classes

Tutorial September 02, 2024
javascript 

class Animal {
  constructor(type, name) {
    this.type = type;
    this.name = name;
  }

  speak() {
    console.log(`${this.name} makes a noise.`);
  }
}

class Dog extends Animal {
  constructor(name, breed) {
    super('Dog', name);
    this.breed = breed;
  }

  speak() {
    console.log(`${this.name} barks.`);
  }
}

const dog = new Dog('Buddy', 'Golden Retriever');
dog.speak(); // Output: Buddy barks.

The super keyword is used to call the constructor or methods of the parent class. This is particularly useful when you need to add functionality to a subclass while still retaining the behavior of the parent class.

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