Adding assets (CSS, JS) to a Drupal module via *.libraries.yml If this is your first approach to the intersection between Drupal and JavaScript and it may even be your first approach to Drupal and its world, its convenient that you review this section beforehand, in which we are going to share some terms and names that we will use throughout the tutorial. For the query filtered by the current user data through the current_user service . Examples of this are ads, social media sharing buttons, social media listing widgets. Drupal 9 add inline JavaScript to a page programmatically However, remember that Drupal no longer loads jQuery on all pages by default; Drupal only loads what's necessary. Here you can check it out the AJAX API in Drupal. You still have to define it as an attachment (either for the page or for a certain element) by using any of the techniques above. Lets see: So JavaScript does not allow us to execute the function, because after the keyword function it waits for a name that it cannot find. Enter a label. Add Custom CSS and Javascript To Your Drupal 8 Site And dont forget to consider jQuerys recommendations for good use. It is very important in terms of performance, since it facilitates the localization of HTML selectors. Until now it was simply a text message, but now we are going to add a table with comments associated with the current user. In our behaviors we must send -always- the context of execution of this. Less secure. so…It is possible loading a library directly from remote? We want to extract data about the visitors identity in order to give them a more personal greeting. Here you can reach the original publication in Medium, the so called: JavaScript & Drupal 101 TUTORIAL HANDBOOK TOTAL MAX POWER 2000 (I can swear I had a lot of fun thinking about the title). The mechanics is that we will declare actions from our side and Drupal from its side will provide all the Javascript/JQuery needed to make those declared actions happen on the fly. These AJAX commands will add the required jQuery internally and will prepare the action without us having to add the necessary JavaScript code directly. jQuery has -at the time of writing- fourteen years of life since its first published version and extensive use throughout all the websites published on the Internet. Third, The context execution of the IIFE is created and ends up destroying it automatically: it frees up memory space, and releases it quickly. Well, we can use the final parenthesis to call its execution: They are built in a compartmentalized way, without contaminating any global object, that is, the global execution space (that the variables only live inside their function, like a private code block). Connect and share knowledge within a single location that is structured and easy to search. This example assumes that the actual JavaScript cuddly-slider.js is located in the subfolder js of your module. It is possible to request to Drupal the use of an external library to incorporate it to our project, as we can see in the example of the use of backbone.js in the Drupal core, created by third parties, incorporated to Drupal and declared coherently with their external data: By the way, in the same file core.libraries.yml youll can see all the JavaScript resources declared from the core of Drupal. We are going to rethink a little this initial script to make a progressive loading of the Bacon Ipsum welcome paragraphs. This means that you still need to attach the library to a page or element using any of the above techniques. It will be important for me. Teams. The purpose of jQuery is to make it much easier to use JavaScript on your website.". } The Ajax API in Drupal contains such an extensive set of classes, events, resources and possibilities that you can make several articles of the extension of it just about using Ajax. Ok. We can extract this information inside our Controller through the service current_user: api.drupal.org/core.services.yml/current_user/9.0.x, which offers us methods to obtain this information. For all this you will use jQuery (perhaps). It's "dynamic" because you can use logic to control this attaching of the libraries. And all through a combination of theory and practice. In Drupal 8 and later versions, stylesheets (CSS) and JavaScript (JS) are loaded through the same system for modules (code) and themes, for everything: asset libraries. But lets see first the base case for our case: #attached. To do this we are going to perform a database query using the database service, extract the returned values and process them by launching them into the table rendering system. In Drupal 8 client resources like CSS and JavaScript files are attached to render arrays: $element ['#attached'] = array ('js' => array (PATH_TO_JS)); Where $element can be an output render array or a form element. These libraries can be located in the /core/core.libraries.yml file: Where you can see from line 350 of the file the list of jQuery libraries associated to Drupals core. Guide: How to integrate JavaScript in Drupal 8-9 | Drupal Sun Boolean algebra of the lattice of subspaces of a vector space? As such animations are available in the jQuery library and its integrated in Drupal (we will see it later), then instead of creating those functions well declare the dependency and we will be able to use them: In addition, there is a set of options that you can use as attributes to customize the use of your new CSS / JavaScript libraries. I would like to know what is the best way to add a JavaScript file into a specific page basing on the content type. Lines and paragraphs break automatically. Depending on the nature of your computed values and the component you are attaching drupalSettings to, you may have to alter the cacheablility metadata accordingly. Drupal 8:How to add tags for custom content types For the map_page content type, I adde the below two line of code in page--map_page.tpl.php. Something halfway between the framework and the CMS, free software downloadable and installable from here: https://www.drupal.org. drupal - How do i add the css and js in the controller file of Drupal8 Then we also put a dividing line over the element, as a separator. Add conditional javascript from CDN (external library), Add js depend jQuery in a specific content type. Well, we can add it as a resource to our project without problems through the guidelines we already know: And then we can overwrite the dependency from its declaration in the file my_custom_resource.info.yml: We will perform a couple of exercises using jQuery in our custom module. Basically: But lets think carefully about this execution: it will be performed when the DOM has been loaded completely (at an initial moment), but it will not make adjustments after a partial loading of the DOM (for example, after an AJAX execution that modifies only a portion of the DOM). Neither does it deal with Drupal Theming issues and its approach to them is only tangential. Lets see…in our custom module, well include a new file module_name.libraries.yml in order to describe the new dependencies, so in our case study, well create a new file called javascript_custom_module.libraries.yml filled with the next lines: All the libraries will be declared, as a rule of style, in the same .libraries.yml file, where we will describe all the libraries we need in our project, grouped by function or use. I prepend so that I don't run into dependency trouble with any local scripts. This guide has been published without -direct- profit, but my personal interest is that it spreads and helps my communication. In the case of front-end/styling (e.g. To declare your library as a global dependency for your Theme or your custom module, just include it in the declarative file of the *.info.yml resource using the libraries property: In any case and as in the previous section, there are discussions about the evolution of this and some measures that are supposed to be taken for future versions: https://www.drupal.org/node/1542344. Add JavaScript into a specific content type, How a top-ranked engineering school reimagined CS curriculum (Ep. Basics There are two basic steps to including JavaScript in your theme or module: Define a library Attach the library to an entity. Drupal 8 introduced the Dynamic Page Cache, which caches rendered fragments of the page and improves performance for authenticated users. }); To make the subject a bit more dynamic, we added one of jQuerys less poisono…emm…more discreet animations with a confirmation message and the .slideDown() function from jQuery, which vertically scrolls the content from top to bottom: And when you reload everything, you see the completeexecution of all the JavaScript on the page: Here you have the code formatted as a gist: In this guide, we already know how to integrate JavaScript in our modules and projects, how to create interactions, passing parameters between PHP (server) and JavaScript (client), integrating jQuery in our dependencies and as a final step to prepare the last step that should integrate all the above, we must talk about the concept of Drupal Behaviors. You will need a Drupal deploy, maybe XAMP+ environment with web server, database and a Drupal deployed and ready to use, or if youre using DDEV (as I recommended in the previous section). Due to the limitations regarding the extension of this tutorial, we will focus on some basic keys, leaving for later the possibility of preparing an article on more advanced issues. It allows you to: Powered by Drupal and Apache Solr | Brought to you by Evolving Web | Content provided by Drupal experts like you! In each case, a processing of behaviors is done through the method: Which loads a function that runs through all the behaviours and executes them according to their context and parameters: The next step is to put some control on the execution of the instruction, passing it from an active mode (that writes in the console just when loading) to a reactive mode (that writes only when an interaction takes place): So now we have placed over the ID selector of our welcome message a click control event, which when clicked loads a message into the console: With this small example above, we have seen how to add a small event-based (click) functionality. JavaScript API overview | JavaScript API | Drupal Wiki guide on Drupal.org If they are null, we create them and load them with an initial value equal to one. In either case, it will look somewhat like this: You might want to help Drupal and not produce duplicate library entries by using non-numeric keys: The reason for this is Drupal's way of merging arrays will lead to an invalid nested array and notices like this (googlefood): To give another example of attaching a library to a render array, If you are building a block plugin in your module, you can attach the libraries to the render array in the build() function of your class extending the BlockBase class (as of Drupal 8 beta 6). So the library definition of our previous example becomes: In our PHP files, we can now pass the desired drupalSettings alongside our library. 2) Ask to the render servie to transform the element in HTML and 3) Loading the new element in an existing wrapper using AJAX Commands. More secure and recommended. In the case of dynamic JS: please consider using configurable JavaScript instead, that is almost always the much better choice. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. There are two categories of "dynamicness": If the dynamic CSS/JS is used across multiple requests, then you can use hook_library_info_alter() to modify a library to include your dynamically/automatically generated CSS/JS. Inline JavaScript is highly discouraged. So lets give some context through some basic keys and well go on.