diff --git a/lib/webpacker/helper.rb b/lib/webpacker/helper.rb
index e63eeab17..4a410c794 100644
--- a/lib/webpacker/helper.rb
+++ b/lib/webpacker/helper.rb
@@ -96,6 +96,9 @@ def favicon_pack_tag(name, **options)
   #   <%= javascript_pack_tag 'calendar' %>
   #   <%= javascript_pack_tag 'map' %>
   def javascript_pack_tag(*names, defer: true, **options)
+    raise "To prevent duplicated chunks on the page, you should call javascript_pack_tag only once on the page." if @javascript_pack_tag_loaded
+    @javascript_pack_tag_loaded = true
+
     javascript_include_tag(*sources_from_manifest_entrypoints(names, type: :javascript), **options.tap { |o| o[:defer] = defer })
   end
 
@@ -141,6 +144,9 @@ def preload_pack_asset(name, **options)
   #   <%= stylesheet_pack_tag 'calendar' %>
   #   <%= stylesheet_pack_tag 'map' %>
   def stylesheet_pack_tag(*names, **options)
+    raise "To prevent duplicated chunks on the page, you should call stylesheet_pack_tag only once on the page." if @stylesheet_pack_tag_loaded
+    @stylesheet_pack_tag_loaded = true
+
     return "" if Webpacker.inlining_css?
 
     stylesheet_link_tag(*sources_from_manifest_entrypoints(names, type: :stylesheet), **options)