Drupal 8 Theming With Twig Free 23
Macabeo Eastman
Next, we will want to enter a name of drupal8 within the Create database field, as shown in the following image, and then click on the Create button.
While there are many different browsers to view web content on, Google Chrome is definitely a favorite browser when theming in Drupal. It is not only standards compliant ensuring that most HTML and CSS work properly but Chrome also allows us to inspect the HTML and CSS and preview changes "live" within the browser using the Developer Tools option.
To take it one step further, you can have a field.html.twig and field--field-long-text.html.twig. In that case, it makes no difference what directory they are in (as long as they are somewhere in the theme/templates directory). Drupal will use the field.html.twig for every field except fields with the machine name of field_long_text when it will use the template you created with the more specific name.
Then in Drupal, the paragraph--text.html.twig file uses include to bring in the entire content of the Pattern Lab paragraph-text.twig file and replaces the text variable with the Drupal output of the long text field in my text paragraph bundle content.field_long_text .
The Drupal template paragraph--text.html.twig both extends and embeds templates. It extends the Drupal paragraph.html.twig to add bring global classes and html structure into the text bundle template and it embeds the Pattern Lab text.twig template in place of the parent paragraph.html.twig content block while replacing the text variable with the Drupal content.field_long_text variable. Adding comments to the plwidgetopen and plwidgetclose blocks prevents them from printing the paragraph structure created in Pattern Lab.
I'm trying to use Drupal 8, with an own theme, due big structure differences for my requirements I have a page--front.twig.html and a page.twig.html, I would like to create template parts as used in phrozn oder in a normal Symfony2 project, for example a footer.html.twig and a header.html.twig. These templates are saved under a subdirectory /parts/
Using theme hook suggestions, create a template called page--front.html.twig, and use the extends tag to reference the page.html.twig template. Then, underneath, create a block with the same name of the Twig block (main), created in page.html.twig. Inside this block, create the DIV, and use the parent() function to print the contents of the Twig block as defined in the current template.
Below is an example of the potential output. The line item beginning with an "x" is the twig template that is used for this element. The rest are registered file naming suggestions that you can use as an override.
There are multiple approaches to doing this, but the one I used starts with giving the template a unique name. I went with the format of "my-module-templatename.html.twig", where "my-module" is the machine name of my module (with underscores changed to dashes) and "templatename" is the unique name of this particular template within my module's scope.
The important point to understand is the difference in outputing a variable that has a scalar value (integer, string, boolean) versus outputing a variable that contains an array. In the former case, the value is simply output inline with any surrounding static content. In the latter case, if there is a "#theme" key, then the array is treated as another render array, and it is processed as such using the specified Twig theming template.
This course will give you a deep understanding of advanced Drupal theming concepts. You'll learn how to use advanced functions in Twig, customize and extend a Drupal theme, analyze and resolve common theming issues, work with CSS and JavaScript for Drupal themes, and much more.
You can use twig for a lot of things. Making drupal components more industrial means you can pick up twig and just work with it rather than in D7 where you would need to learn the Drupal twig version.
Although we do not have most of the features of PHP in twig, we do have a set of constructs for working with arrays and variables. For example, we can check if a variable exists before displaying this variable.
Inject the twig Symfony service into your own services and use itsrender() method. When using service autowiringyou only need to add an argument in the service constructor and type-hint it withthe Environment class:
Next, register your class as a service and tag it with twig.extension. If you'reusing the default services.yaml configuration,you're done! Symfony will automatically know about your new service and add the tag.
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