![]() ![]() ![]() While setting up your theme, you can include different theme regions and CSS breakpoints, and set a base theme to start from (like Bartik or Classy). Once you've set up your Drupal 8 site, you can use the Drupal console to generate a new theme: drupal generate:theme ![]() In this post, we'll talk about creating basic themes with Twig and the way that they work. But instead of dreading the change to how themes work, developers should be excited about the change to Twig and what they can do with it. Twig is the new theming engine in Drupal 8! PHPTemplate was removed due to no longer being actively maintained and with several security flaws. Wrapping upĭrupal has a set of rules to determine which template it will use.With Drupal 8's change of theming engine from PHPTemplate to Twig, developers have more power and theme developers can develop faster. The easiest method to create a starting point is to copy the contents of and to and then make your changes (alternatively, you could copy the entire file and change the name to when pasting in your theme). This means it will be used if it is available.Īfter creating the template, you’ll have an empty file. As you have seen above, if you are on your sites front page, is at the top of the list. If you want to make changes to use the front page template and leave all other pages as is, then you can create a new file in your theme called. After rebuilding the cache, the output would change to: If I want to customise this, I could simply copy the template from the classy theme and add to my sub theme. This includes the theme, classy, which in this case is the parent theme. This is telling you the path to the template that is used. ![]() But because there isn’t a or a html- in this theme or the parent theme, so is used. If there was a in my sites theme, then that would have been used (assuming I’m on the front page). In the example above, the following are potential templates: And then the BEGIN OUTPUT line is telling you the location of that template. You’ll see a x next to the template that is used. 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. One of the many changes in Drupal 8 is that all HTML output is rendered via a Twig template. ![]()
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