Rails "Webpacker :: Manifest :: MissingEntryError" error countermeasures I will post it as a memorandum.
・ Cloud9 ・ Rails 6.1.0
ruby:application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Myapp</title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<%= csrf_meta_tags %>
<%= csp_meta_tag %>
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
<%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
</head>
<body>
<%= yield %>
</body>
</html>
When I started the server with "rails s" above, "** Webpacker :: Manifest :: MissingEntryError **" I got an error. According to various investigations, it seems that the following code is not required when using webpacker.
ruby:application.html.erb
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
** javascript_include_tag ** is read via Sprockets, so When using webpacker, you need to use the following ** "javascript_pack_tag" **.
ruby:application.html.erb
<%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
However, changing to the above does not solve the error, and I am currently using the above code by deleting it. Probably there is a problem with how to write javascript_pack_tag, so focus on that and find a solution I hope I can find it.