Guide to Drupal 8 Theme Development

Presented at Drupal Camp Asheville 2016

Originally planned as an introduction to Drupal 8 theme development with Twig, this quickly became a very in-depth guide to many important aspects for building a complete theme.

This presentation covers the following aspects of theme development in Drupal 8

• Anatomy of theme file system
• Creating your first Drupal 8 theme
• Twig templates, and where to find them
• Twig syntax
• Working with template suggestions
• Modifying content with hook_preprocess()
• Drupal render arrays
• Custom templates with hook_theme()

Guide to Drupal 8 Theme Development

Download presentation as PDF: Introduction-to-Drupal-8-Theme-Development

References & Resources

Twig

• Documentation
• Template Designers Syntax

Twig & Drupal

• Twig in Drupal 8
• Twig Best Practices
• Drupal Twig Functions

Render Array Resources

• Drupal 8 Render Arrays API – General overview of render arrays
• Drupal 7 Form API – Though the API is technically for Drupal 7, these
  properties also apply to Drupal 8.
• Render Array Snippets – Oldie but a goodie
• Drupal 7 Examples module – render_examples submodule