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

Fixing JavaScript errors


When we created our homepage, we attached a couple of JavaScript libraries directly to our page--front.html.twig template. However, since we are loading our theme's custom scripts file globally, this can sometimes create unnecessary JavaScript errors.

If we inspect our About Us page, we will see one such error caused by our script trying to configure the FlexSlider library, which only exists on our homepage.

While we are not covering the fundamentals of JavaScript and how to write proper syntax, it is important to point out this issue. This can be a common error when using JavaScript with the different techniques used to theme Drupal 8. So, let's take a quick look at how to fix this to have this as part of our theming tools moving forward.

Begin by navigating to themes/octo/js and opening the octo.js file. From here, we can follow these steps to resolve the JavaScript error:

  1. Locate the Flexslider function call.

  2. Wrap the function in a conditional structure that will look...