How to add JavaScript to a Drupal module?
If your JavaScript depends on any other resources, like jQuery (included with Drupal) or Drupal settings you can use dependencies: If you wished to quickly add to drupalSettings before it gets passed to the library, you could modify it like so:
How are stylesheets and JavaScript loaded in Drupal?
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. Asset libraries can contain one or more CSS assets, one or more JS assets and one or more JS settings.
How to add assets to a Drupal module?
“Attach” the library to a render array in a hook. But in the case of themes, there is an alternative to step 3: themes can choose to load any number of asset libraries on all pages. To define one or more (asset) libraries, add a *. libraries. yml file to the root of your module folder (alongside your .info.yml file).
Why does Drupal not load CSS on all pages?
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 (CSS/JS) on all pages because this is bad for front-end performance.
How to save CSS and js files in Drupal?
Drupal does not load all assets (CSS/JS) on all pages because this is bad for front-end performance. Save the CSS or JS to a file. Define a “library”, which can contain both CSS and JS files. “Attach” the library to a render array in a hook.
How are CSS and JS loaded in Drupal?
In Drupal, stylesheets (CSS) and JavaScript (JS) are loaded through the same system for modules (code) and themes, for everything: asset libraries. Drupal uses a high-level principle: assets (CSS or JS) are still only loaded if you tell Drupal it should load them.
How to add stylesheets to a Drupal theme?
For themes, see Adding stylesheets (CSS) and JavaScript (JS) to a Drupal theme. 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.