inheritance.ts

class Animal {
    name: string;
    constructor(name: string) {
        this.name = name;
    }
    speak(): void {
        console.log(`${this.name} makes a noise.`);
    }
}

class Dog extends Animal {
    constructor(name: string) {
        super(name);
    }
    speak(): void {
        console.log(`${this.name} barks.`);
    }
}

let dog = new Dog("Fido");
dog.speak();