Use config.assests.js_compressor setting for save original js compressor

lib/requirejs/rails/config.rb

@@ -14,6 +14,7 @@ class Config < ::ActiveSupport::OrderedOptions
       def initialize(application)
         super
         self.manifest = nil
+        self.js_compressor = nil
 
         self.logical_asset_filter = [/\.js$/, /\.html$/, /\.txt$/]
         self.tmp_dir = application.root + 'tmp'

lib/requirejs/rails/engine.rb

@@ -20,6 +20,8 @@ class Engine < ::Rails::Engine
 
         config.assets.precompile += config.requirejs.precompile
 
+        config.requirejs.js_compressor ||= config.assets.js_compressor
+
         # Check for the `requirejs:precompile:all` top-level Rake task and run the following initialization code.
         if defined?(Rake.application) && Rake.application.top_level_tasks == ["requirejs:precompile:all"]
           # Prevent Sprockets from freezing the assets environment, which allows JS compression to be toggled on a per-

lib/tasks/requirejs-rails_tasks.rake

@@ -95,7 +95,7 @@ OS X Homebrew users can use 'brew install node'.
 
       # Save the original JS compressor and cache, which will be restored later.
 
-      original_js_compressor = requirejs.env.js_compressor
+      original_js_compressor = requirejs.config.js_compressor
       requirejs.env.js_compressor = false
 
       original_cache = requirejs.env.cache