title: Using the Material Design package for Angular2
body: <p>According to the angular/material2 <a href="https://github.com/angular/material2" rel="nofollow">site</a>, component packages can be installed with commands like <code>npm install @angular2-material/checkbox</code>.</p>
  
  <p>When I used this command, the @angular2-material/checkbox folder doesn't have a checkbox.ts file for the checkbox element. Instead, it has a checkbox.d.ts file that declares a regular class named <code>MdCheckbox</code>. This isn't a component, so I can't access it in my Angular2 template.</p>
  
  <p>When I download the full angular/material2 archive, the src folder contains checkbox.ts, which defines <code>MdCheckbox</code> as a component. So is there a problem with the npm package or the GitHub archive?</p>