try terser

Author: romkey

Gemfile

@@ -9,7 +9,8 @@ gem 'pg'
 gem 'puma', '~> 5.6.4'
 gem 'rails', '~> 6.1.1'
 gem 'sass-rails', '~> 5.0'
-gem 'uglifier', '>= 1.3.0'
+#gem 'uglifier', '>= 1.3.0'
+gem 'terser'
 
 # gem 'therubyracer'
 

Gemfile.lock

@@ -281,6 +281,8 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
+    terser (1.1.12)
+      execjs (>= 0.3.0, < 3)
     thor (1.2.1)
     tilt (2.0.11)
     timeout (0.3.0)
@@ -289,8 +291,6 @@ GEM
     turbolinks-source (5.2.0)
     tzinfo (2.0.5)
       concurrent-ruby (~> 1.0)
-    uglifier (4.2.0)
-      execjs (>= 0.3.0, < 3)
     unicode-display_width (2.3.0)
     warden (1.2.9)
       rack (>= 2.0.9)
@@ -348,8 +348,8 @@ DEPENDENCIES
   sidekiq
   spring
   spring-watcher-listen (~> 2.0.0)
+  terser
   turbolinks (~> 5)
-  uglifier (>= 1.3.0)
   web-console (>= 3.3.0)
 
 RUBY VERSION

config/environments/production.rb

@@ -27,7 +27,9 @@
   config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
 
   # Compress JavaScripts and CSS.
-  config.assets.js_compressor = Uglifier.new(harmony: true)
+#  config.assets.js_compressor = Uglifier.new(harmony: true)
+  config.assets.js_compressor = :terser
+
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.