![]() ![]() You should now see a whole range of HTML comments that list the Twig templates like so: įor each template that is used for the page, these comments are telling you the suggested templates. Once you have this set up, it is time to view the page source to see the Twig templates. If this is the case, add the nfig and debug lines to that, like so: parameters: You may have another entry such as: parameters: All you need to do is add the following in your services.yml file: parameters:Ĭheck that if you already have parameters. In the services.yml file, find nfig and set debug to true.ĭon’t have nfig in your services.yml file?ĭon’t worry, you may not have it in your particular setup. You can manually make this change in your sites services.yml file. To turn on Twig’s debug mode, you can run the following Drupal Console command: $ drupal site:mode dev You’ll notice that under nfig, debug is set to false. If you haven’t already done so, you need to create a services.yml file for your site: ![]() View the page source to see the templates in HTML comments.So the question is, how do you know which template is being used? And if you override a template, how can you verify that your template is now used?įortunately Drupal makes this pretty easy with these steps: Have a look at to find out more about how Drupal decides which template to use. There are actually more templates than what you see here as this diagram doesn’t go down to field level (each field can have its own template).įor any given page, node, region or field, there is normally more than one template that Drupal could use and it will choose the most specific one. This means that if you want to override the HTML for a given page, node, region or field, you can copy the Twig template that is being used to your theme and make your changes.Īs you can see in the diagram below, a page is made up of many templates. I won’t go into all of the differences that exist in this blog, but I will highlight a few examples to provide a general understanding or “bird’s eye view” so-to-speak.One of the many changes in Drupal 8 is that all HTML output is rendered via a Twig template. There are some key differences in syntax and coding standards when working with Twig versus the PHP templating system of prior Drupal versions. Standardized consistency is a key advantage to Twig’s efficiency. The way Twig is structured it decreases the possibilities for wide differences in coding and theming practices, techniques, non-standard coding, and hacks often seen when working with prior versions of Drupal, where sites have been developed and maintained by other people and teams. Twig also provides consistent theming practices that can be taken up by other developers and site themers as projects get handed off from one development company (dev team) to another, as many often do. It provides clear error messaging and is also very well documented. Not only is Twig a faster templating system than the PHP templates used in prior versions of Drupal, it also easy to learn. It has been developed for use with Symfony, which is the new PHP framework behind Drupal 8 that follows the MVC (model-view-controller) architecture. The great advantages of using Twig is that it is fast, modern, and secure. Twig templates compile markup down to plain optimized PHP versus regular unoptimized PHP, thus enhancing speed and performance. ![]() ![]() Twig is the new templating engine for Drupal 8, which uses a different language and syntax than prior Drupal php templates used for theming and rendering output to a site page. In this blog, I will go over some of the changes in Drupal’s theming layer that have gone from the wild, “cowboy-like” PHP template, to a more simplified and standardized templating system called Twig. Finally, after years of working within a hybrid environment, we are now truly moving towards a system that separates logic, behavior, and design. Drupal 8 is packed with many changes and new enhancements geared towards optimization, performance, and standardization. ![]()
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