In this chapter, we learned how to style our Aurelia application using CSS. Also, we explored the two most popular CSS preprocessors—LESS and SASS. We saw how these preprocessors help us develop more powerful style sheets using variables and extensions.

We explored how to automate tasks using Gulp. Gulp is used by the Aurelia CLI to execute all the tasks related to it.

Lastly, we went through different CSS Frameworks and explored and configured Google's Material Design Framework. We used Material Design to create our example application and take advantage of the most common UI elements.

In the next chapter, we will see how to apply testing in our code by adopting Test-Driven-Development in our development process. Keep reading!