Theming Your Site Part 1: Theme Functions and a Twig Primer
This chapter focuses on the proper way to theme your site, using a markup language called Twig, using theme functions, using theme template files, and using subthemes. Within the pages of this chapter, you’ll take a look at theming the output from a module by using theme functions and a theme template. This chapter also includes an in-depth Twig primer. ( Chapter 13 will introduce you to creating a new theme and a subtheme.) Knowing Drupal programming without knowing how to make your web site look good is not going to go over so well with your clients, employer, or end users. Giving users a great-looking site with a great user experience is why theming your site is an important skill set.