Good! You made it all the way to the controllers tutorial. Now, let's walk through the concept of controllers.
We created an app/controllers/ directory for you. It contains two files: application.js and steroidsTutorial.js. From now on, let's not include any JavaScript in our views, okay?
In the application wide layout app/views/layouts/steroidsTutorial.html there is a <script>-tag that automatically includes a controller for this resource (steroidsTutorial). Open app/controllers/steroidsTutorial.js and enable the top bar.
We also include application.js for every view. Open that application controller and see how we extracted the previous inlined WebView opening to more reusable code.