Dependencies

When Reblocks renders a page, it collects CSS and JS dependencies from all widgets by calling the generic-function reblocks/dependencies:get-dependencies. Also, this function is called on the current app to get such common dependencies as jQuery and CSS framework.

If defining a custom method for the reblocks/dependencies:get-dependencies generic function, ensure it returns a list of reblocks/dependencies:dependency objects.

Typically, there is already a JS or CSS file somewhere near the ASDF system. In this case, use the reblocks/dependencies:make-dependency function like this:

(defmethod reblocks/dependencies:get-dependencies ((app my-app))
  (list* (reblocks/dependencies:make-dependency "js/my-app.js"
                                                :system :some-asdf-system)
         (call-next-method)))

Another way to specify a dependency is to use Parenscript or LASS to define JS or CSS right inside the method. Here CSS code is defined for the widget:

(defmethod reblocks/dependencies:get-dependencies ((widget my-custom-widget))
  (list*
   (reblocks-lass:make-dependency
    `(.my-custom-widget
      :border 2px solid red
      :padding 1em))
   (call-next-method)))

Note that this code uses the REBLOCKS-LASS:MAKE-DEPENDENCY function which is available from the separate ASDF system REBLOCKS-LASS.