Add APIs to remove and clear custom CSS and JS files

docs/customizing_page_views.md

@@ -140,4 +140,23 @@ you of this step if you miss it):
 /// app/assets/config/manifest.js
 //= link admin.css
 //= link admin.js
+
+## Removing custom CSS and JS
+
+Administrate also provides APIs to remove added CSS or JS files, or clear all at once.
+
+Sometimes you may want to remove custom CSS or JS files that you previously added to Administrate　—　for example, when cleaning up unused assets, switching to a new design, or troubleshooting conflicts. Administrate provides simple APIs to help you manage these files directly from your configuration.
+
+To remove a specific CSS or JS file, use:
+
+```ruby
+Administrate::Engine.delete_stylesheet("admin")
+Administrate::Engine.delete_javascript("admin")
+```
+
+If you want to clear all custom CSS or JS files at once, use:
+
+```ruby
+Administrate::Engine.clear_stylesheets
+Administrate::Engine.clear_javascripts
 ```

lib/administrate/engine.rb

@@ -38,6 +38,22 @@ def self.add_stylesheet(stylesheet)
       @@stylesheets << stylesheet
     end
 
+    def self.delete_stylesheet(stylesheet)
+      @@stylesheets.delete(stylesheet)
+    end
+
+    def self.delete_javascript(script)
+      @@javascripts.delete(script)
+    end
+
+    def self.clear_stylesheets
+      @@stylesheets.clear
+    end
+
+    def self.clear_javascripts
+      @@javascripts.clear
+    end
+
     def self.stylesheets
       @@stylesheets
     end