![]() ![]() In this example, the JavaScript: cuddly-slider.js and CSS cuddly-slider.css are located in the respective js and cssdirectories of your theme. Each "library" in the file is an entry detailing CSS and JS files (assets), like this: # If your theme is named fluffiness, the file name should be. "Attach" the library to all pages, to specific Twig templates, or target specific pages via a render element in a preprocess function.ĭefine all of your asset libraries in a *.libraries.yml file in your theme folder. ![]() Define a "library", which registers these CSS/JS files with your theme.Save the CSS or JS to a file using the proper naming conventions and file structure.In Drupal 8 drupal_add_css(), drupal_add_js() and drupal_add_library() were removed in favor of #attached.That has been replaced with *.libraries.yml file. In Drupal 7 libraries had to be defined using hook_library_info().If your theme requires jQuery or other assets you want to load on all pages, add them in *.libraries.yml. JQuery, for example, is no longer automatically loaded unless explicitly specified in *.libraries.yml. Only CSS, and JS that is required on a page will be loaded.The scripts property (for adding JS) in has been removed and also replaced by *.libraries.yml where `*` is the name of the theme or module.The stylesheets property (for adding CSS) in has been removed and replaced by *.libraries.yml where `*` is the name of the theme or module.The file has replaced the file (with the same data).There are six important differences compared to Drupal 7 for themers: Drupal does not load all assets on every page because it slows down front-end performance. Drupal uses a high-level principle: assets (CSS or JS) are still only loaded if you tell Drupal it should load them. ![]()
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