js__typescript__pluralsight1/app/webdeveloper.ts

class WebDeveloper extends Developer {
  favoriteEditor: string;
  writeTypeScript(): void {
    // Write awesome code.
  }
}

let webdev = new WebDeveloper();
webdev.department = 'Software Engineering';
webdev.favoriteEditor = 'WebStorm';
webdev.documentRequirements('Markdown');
webdev.writeTypeScript();