Book Image

Drupal 8 Theming with Twig

By : Chaz Chumley
Book Image

Drupal 8 Theming with Twig

By: Chaz Chumley

Overview of this book

Drupal 8 is an open source content management system and powerful framework that helps deliver great websites to individuals and organizations, including non-profits, commercial, and government around the globe. This new release has been built on top of object-oriented PHP and includes more than a handful of improvements such as a better user experience, cleaner HTML5 markup, a new templating engine called Twig, multilingual capabilities, new configuration management, and effortless content authoring. Drupal 8 will quickly become the new standard for deploying content to both the web and mobile applications. However, with so many new changes, it can quickly become overwhelming knowing where to start and how to quickly. Starting from the bottom up, we will install, set up, and configure Drupal 8. We’ll navigate the Admin interface so you can learn how to work with core themes and create new custom block layouts. Walk through a real-world project to create a Twig theme from concept to completion while adopting best practices to implement CSS frameworks and JavaScript libraries. We will see just how quick and easy it is to create beautiful, responsive Drupal 8 websites while avoiding the common mistakes that many front-end developers make.
Table of Contents (20 chapters)
Drupal 8 Theming with Twig
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Preface
Index

Touring Classy


We can take a closer look at Classy by navigating to the core/themes/classy folder of our Drupal instance. At first glance, the theme structure of Classy is quite organized. It is well-structured with folders for CSS, images, and a multitude of Twig templates. Each template has been organized based on its functionality as follows:

Everything so far screams best practices and is one of the major benefits of creating a subtheme that uses Classy as a base theme. However, we can still add our own regions, libraries, and Twig templates as we would for any other theme. However, in some cases, we may find ourselves also needing to override libraries with our own CSS or JS without modifying any assets directly located in the base theme.

Overriding a library

So when we talk about overriding a library, we have options to replace the entire library, replace an asset with another asset, or remove an asset or entire library simply by using libraries-override within our theme's *.info.yml...