This presentation outlines some of the major changes to the theme layer and why they were necessary to make a better experience for themers and module developers using Drupal 8. We will also walk through some of the internals of different aspects of the theme system and how they might affect your day-to-day work with Drupal.

Drupal 8 will ship with a fancy new template engine (Twig) and a simpler theme layer. In my session I’ll show you some goodies from Twig and walk through the changes it creates for developers.

Many parts of the presentation include best practices for working with the Drupal 7 theme layer which will give you knowledge that you can use right away.

• A high-level overview of the changes to the theme system in Drupal 8.

• Some of the goodies that are possible now that we’re using Twig as our templating engine.

• Using theme hook suggestions to cut down on custom code and have themers thanking you.

• Phases of the theme system and where you can step in to alter things.