Export the script to importmap paths

config/blacklight/oembed/manifest.js

@@ -0,0 +1 @@
+//= link_tree ../../../javascript .js

config/importmap.rb

@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+
+pin_all_from File.expand_path("../app/javascript/blacklight-oembed", __dir__), under: "blacklight-oembed"

lib/blacklight/oembed/engine.rb

@@ -10,6 +10,11 @@ class Engine < Rails::Engine
       # Allows an adopter to pass additional parameters through to an OEmbed
       # service. Examples of this could include `:canvas_index`, or `:max_width`
       config.additional_params = []
+
+      initializer 'blacklight_oembed.importmap', before: 'importmap' do |app|
+        app.config.assets.paths << Engine.root.join("app/javascript")
+        app.config.importmap.paths << Engine.root.join('config/importmap.rb') if app.config.respond_to?(:importmap)
+      end
     end
   end
 end

lib/generators/blacklight_oembed/install_generator.rb

@@ -18,6 +18,10 @@ def inject_oembed_configuration
       copy_file "oembed_providers.rb", "config/initializers/oembed_providers.rb"
     end
 
+    def appease_sprockets4
+      append_to_file 'app/assets/config/manifest.js', "\n//= link blacklight/oembed/manifest.js"
+    end
+
     def configuration
       inject_into_file 'app/controllers/catalog_controller.rb', after: 'configure_blacklight do |config|' do
         if ENV['CI_TEST_LEGACY_CONFIGURATION'].present? || Gem::Version.new(Blacklight::VERSION) < Gem::Version.new('8.0')

rollup.config.js

@@ -14,7 +14,7 @@ let includePathOptions = {
 };
 
 const rollupConfig = {
-  input: 'app/javascript/oembed.js',
+  input: 'app/javascript/blacklight-oembed/oembed.js',
   output: {
     file: `app/assets/javascripts/blacklight_oembed/${fileDest}.js`,
     format: ESM ? 'es' : 'umd',