The extends keyword is used to create a subclass (child class) that inherits from another class (parent class).
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.