Interfaces and Classes

index.ts

// Write an interface here
interface Directory {
  addFile: (name: string) => void;
}

class DesktopDirectory implements Directory {
  addFile(name: string) {
    console.log(`Adding file: ${name}`);
  }

  showPreview(name: string) {
    console.log(`Opening preview of file: ${name}`);
  }
}

const Desktop = new DesktopDirectory();

Desktop.addFile("lesson-notes.txt");
Desktop.showPreview("lesson-notes.txt");