ExecJS::ProgramError in Welcome#index

[sylhare]

Happens on windows following the rails tuto between:

• 4.2 Say "Hello", Rails
• 4.3 Setting the Application Home Page

When restarting the server with rails server in the correct folder, I still get this issue ExecJS::ProgramError in Welcome#index when connecting to http://localhost:3000/welcome/index

[Sd0b]

I changed

blog\app\views\layouts\ application.html.erb

to

blog\app\views\layouts\ default.html.erb

and it's done !!

[sylhare]

Yup it seems to work, thanks!

I will list here all the other solutions that was found for this problem (stackOverFlow).

Solution 1 - replacing application by default

Replacing the "application" by "default" in blog\app\views\layouts\application.html.erb
From

<%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track': 'reload' %>
<%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>

to

<%= stylesheet_link_tag    'default', media: 'all', 'data-turbolinks-track': 'reload' %>
<%= javascript_include_tag 'default', 'data-turbolinks-track': 'reload' %>

It should now be working fine. Although I've read that there might be an issue when running javascript while using "default" instead of application.

---

Solution 2 - changing coffee script's version in the Gemfile

Add in blog/GemFile the coffee-script-source v1.8.0 (v1.9.0 does not work on Windows)

#For Windows it works with CofferScript v1.8
gem 'coffee-script-source', '1.8.0'

Stop the server (if it was running) and do:

bundle update coffee-script-source

It should now be working fine.

---

Solution 3 - Installing nodeJS and ExecJS (Not tested)

With Node.js

• Install Node.js
• Add it to the PATH (ENV_VAR)
• restart the server
• Install Execjs: gem install execjs

[najuste]

I'm sorry to comment the closed topic, but I am not really happy with solution options.
I've just started learning and ran into this... and
Solution 2. - I don't even have this gem installed, and it never came into Error Message
Solution 3. - Didn't work. Error message didn't change
Solution 1. - worked for that application. But do I always have to change that manually? Or could you please explain where / how I'm supposed to change

I'm on Windows 10 with Ruby 2.4.1 , gem 2.6.11, rails 5.1.4

[sylhare]

Allo @najuste ,

Thanks for your question, I added here some more details. I don't know if you're following the ruby on rails tutorial, it's a good read ! 😉

For Solution 1

You should find it in C:\blog\app\views\layouts\application.html.erb in your case if you've created the blog using rails new blog from the root of the C disk C:\.

Here it could be clearer, I have the file application.html.erb on this repository.

There you replace application by default in these two lines:

<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
<%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>

However I really do advise to go with solution 2.

For Solution 2

Here the problem is solved when you change in the Gemfile in blog/Gemfile the coffee script version. You should see what I am talking about the Gemfile, the file is in my repository as well.

You will need to stop the server then do a bundle install after doing that. It should then work.

For Solution 3

Argh I didn't try, but I think there's maybe more to it than what I wrote eheh.

[najuste]

Thanks for a quick reply.

Solution 2

I do not have the'coffee-script-source' gem listed in my Gemfile (?), only 'coffee-rails'.
# Use CoffeeScript for .coffee assets and views gem 'coffee-rails', '~> 4.2' - and it's the same version as yours.

So, I manually added coffee script source in a Gemfile as given and ran bundle install.
However got the message:
The bundle currently has coffee-script-source locked at 1.12.2. Try running bundle update coffee-script-source

And when I tried to run the server got the same in red asking to update.. and so server was not started.

[sylhare]

@najuste
Can you print here a copy of your Gemfile?
I'll check what you have.

[najuste]

Gemfile

source 'https://rubygems.org'

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.1.4'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use Puma as the app server
gem 'puma', '~> 3.7'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '~> 2.13'
  gem 'selenium-webdriver'
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
  gem 'web-console', '>= 3.3.0'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

[sylhare]

Allo,

Try adding that to your gemfile like at line 23:

#For Windows it works with CofferScript v1.8
gem 'coffee-script-source', '1.8.0'

And now it will download and install the right version of coffe script. Tell me how it goes.

[najuste]

:) I did add, as I've posted before here up, and since server could not be started (requesting to update the coffee-script-source bundle, and also run bundle install...) I have removed it again.
Well, I just read the win message again and tried 'bundle update coffee-script-source` ... and it did the job. 'bundle update' just wasn't working... for that
😫
I just needed to read the message again...
My apologies for the disturbance.

[sylhare]

ahah ok, good I'm glad it worked 😉

[MuriungiPatrick]

Works perfectly....I've replaced Applications.html.erb with defaults.html.erb
Thanks

[Siwarr]

none ofthese solutions is working for me pls HELP !
Im following this tutorial : https://guides.rubyonrails.org/getting_started.html
when creating the first hello, Rails! page i get this error:

[MuriungiPatrick]

Have you tried this?

1. Install nodes.js
2. Install the coffe-script-source gem
   gem 'coffee-script-source', '1.8.0'
3. Add this line in "config\initializers\assets.rb"
   Rails.application.config.assets.precompile + =% w (application.css)