Add importmap

config/importmap.rb

@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+
+pin_all_from File.expand_path("../app/assets/javascripts/", __dir__)

lib/blacklight_range_limit/engine.rb

@@ -11,5 +11,9 @@ class Engine < Rails::Engine
     config.before_configuration do
       Blacklight::Configuration::FacetField.prepend BlacklightRangeLimit::FacetFieldConfigOverride
     end
+
+    initializer 'blacklight_range_limit.importmap', before: "importmap" do |app|
+      app.config.importmap.paths << Engine.root.join("config/importmap.rb") if app.config.respond_to?(:importmap)
+    end
   end
 end

lib/generators/blacklight_range_limit/assets_generator.rb

@@ -32,18 +32,26 @@ def assets
         say_status "warning", "Can not find application.css, did not insert our require", :red
       end
 
-      append_to_file "app/assets/javascripts/application.js" do
-%q{
-
-// For blacklight_range_limit built-in JS, if you don't want it you don't need
-// this:
-//= require 'blacklight_range_limit'
-
-}
+      if defined?(Importmap)
+        run 'bin/importmap pin jquery'
+        append_to_file "app/javascript/application.js" do
+          <<~CONTENT
+            import jQuery from "jquery"
+            window.jQuery = jQuery
+            window.$ = jQuery
+            import BlacklightRangeLimit from "blacklight_range_limit"
+            Blacklight.onLoad(() => BlacklightRangeLimit.initialize())
+          CONTENT
+        end
+      else
+        append_to_file "app/assets/javascripts/application.js" do
+          <<~CONTENT
+            // For blacklight_range_limit built-in JS, if you don't want it you don't need
+            // this:
+            //= require 'blacklight_range_limit'
+          CONTENT
+        end
       end
     end
-
-
-
   end
 end

spec/features/a_javascript_spec.rb

@@ -2,11 +2,12 @@
 
 require 'spec_helper'
 
-describe 'JavaScript', js: true do
+RSpec.describe 'JavaScript', js: true do
   it 'initializes canvas chart' do
     visit search_catalog_path
 
     click_button 'Publication Date Sort'
+    debugger
     expect(page).to have_css '.flot-base'
   end
   it 'has a View larger modal' do

spec/spec_helper.rb

@@ -7,7 +7,7 @@
 require 'capybara/rspec'
 require 'selenium-webdriver'
 
-Capybara.javascript_driver = :headless_chrome
+Capybara.javascript_driver = :selenium#:headless_chrome
 
 Capybara.register_driver :headless_chrome do |app|
   Capybara::Selenium::Driver.load_selenium