How can I include javascript file in the rails assets pipeline?

Question

I have created a new ruby on rails project using the command : rails new [project_name].

Further, I want to create javascript files, so I can control my view elements. For this, I've created a new js file and placed it in the app->assets->javascripts->apple_pay.js

Currently the appe_pay.js implementation is just for testing :

console.log("test")

Also, my application.js, used like a manifest file, looks like this :

//= require_tree .

When I run the project using rails server command, I'm expecting to see the message displayed on the console, but it's not, any ideea ?

nothing, I think I am missing something, or just I dont understand how things are working using rails, I am a beginner. — Radu Olteanu, CommentedSep 11, 2019 at 11:32

Elayan Hamamrah · Accepted Answer · 2019-09-11 12:32:57Z

find: config/initializers/assets.rb Then: Rails.application.config.assets.precompile += %w[your_file.js]

noticing that as it's out of application.js you need to include it inside your views using:

javascript_include_tag :your_file

Save & Restart your server :)

Thanks a lot, your answer helped me to find the solution in my case: I had to add : <%= javascript_include_tag 'application' %> in my .erb file, because in the application.js i was requiring the whole tree. — Radu Olteanu, CommentedSep 11, 2019 at 12:49
Great to know that, I wrote the javascript_include_tag based on HAML not html.erb sorry for that but I'm happy that your issue was solved. — Elayan Hamamrah, CommentedSep 12, 2019 at 13:24

Snkt · Accepted Answer · 2019-09-11 12:33:30Z

If you are not install "jquery-rails" then first install the gem and require file also add in application.js

//= require file_name

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