Use rollup to build the javascript into ESM and UMD

.gitignore

@@ -26,4 +26,5 @@ Gemfile.lock
 /jetty
 /pkg
 /tmp
+/node_modules
 /.bundle

README.md

@@ -169,6 +169,12 @@ bundle exec rspec spec/features/blacklight_range_limit_spec.rb
 
 Once you are done iterating on your test you will need to stop the application server with `Ctrl-C`.
 
+# Build Javascript
+
+```
+npm run prepare
+```
+
 # Publishing Javascript
 
 run `npm publish` to push the javascript package to https://npmjs.org/package/blacklight-range-limit

app/assets/javascripts/blacklight_range_limit.js

@@ -19,7 +19,4 @@
 //= require 'bootstrap-slider'
 
 // Ensure that range_limit_shared is loaded first
-//= require 'blacklight_range_limit/range_limit_shared'
-//= require 'blacklight_range_limit/range_limit_plotting'
-//= require 'blacklight_range_limit/range_limit_slider'
-//= require 'blacklight_range_limit/range_limit_distro_facets'
+//= require 'blacklight_range_limit/range_limit.umd'