How to define a library in Drupal 7?
In Drupal 7 libraries had to be defined using hook_library_info(). That has been replaced with *. libraries. yml file. Save the CSS or JS to a file using the proper naming conventions and file structure. Define a “library”, which registers these CSS/JS files with your theme.
What kind of library does Drupal use for CSS?
Most themes will use a global- styling asset library, for the stylesheets (CSS files) that need to be loaded on every page where the theme is active. It is also possible to do with JS via a global- scripts asset library
How to add stylesheets and JavaScript to a Drupal?
To be available everywhere in the theme, the global-styling/global-scripts libraries must then be added to your theme’s info.yml (in this case fluffiness. info. yml) You can attach an asset library to a Twig template using the attach_library() function in any *. html. twig, file like so:
How to add jQuery to a Drupal theme?
If your theme requires jQuery or other assets you want to load on all pages, add them in *. libraries. yml. and then include library in the THEME. info. yml. In Drupal 7 libraries had to be defined using hook_library_info().
Why does Drupal not load CSS on every page?
Drupal uses a high-level principle: assets (CSS or JS) are still only loaded if you tell Drupal it should load them. Drupal does not load all assets on every page because it slows down front-end performance.
When to add JavaScript to a Drupal page?
This is the meaning of the phrase ‘critical path’, once an asset is declared to be in the header it is ‘critical’ for that asset and all of its dependencies to load first. In some cases, you may want to add JavaScript to a page that depends on some computed PHP information.
How to add stylesheets to a Drupal theme?
Declare the dependency with an extension name followed by a slash, followed by the library name, in this case core / jquery. If another library required cuddly – slider it would declare: fluffiness / cuddly – slider, the theme name, followed by the library name.