TypeScript Interfaces

// Interface define karo
interface Printable {
  print(): void;
}

interface Serializable {
  serialize(): string;
  deserialize(data: string): void;
}

// Class implement kare
class Document implements Printable, Serializable {
  constructor(private content: string) {}
  
  print(): void {
    console.log(this.content);
  }
  
  serialize(): string {
    return JSON.stringify({ content: this.content });
  }
  
  deserialize(data: string): void {
    this.content = JSON.parse(data).content;
  }
}

// Interface extend karo
interface Animal {
  name: string;
  sound(): string;
}

interface Pet extends Animal {
  owner: string;
  tricks: string[];
}

const dog: Pet = {
  name: "Rex",
  owner: "Zohaib",
  tricks: ["sit", "stay", "fetch"],
  sound: () => "Woof!"
};