Rails Server Could not find a JavaScript runtime

Question

i am getting the following error. tried to search and try to install extjs, bundler etc gems still am getting the error

harsha@harshamv:~/www/simple_cms$ rails s
/home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.2/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.2/lib/execjs.rb:5:in `<module:ExecJS>'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.2/lib/execjs.rb:4:in `<top (required)>'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/uglifier-2.3.1/lib/uglifier.rb:3:in `require'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/uglifier-2.3.1/lib/uglifier.rb:3:in `<top (required)>'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler.rb:132:in `require'
    from /home/harsha/www/simple_cms/config/application.rb:7:in `<top (required)>'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.1/lib/rails/commands.rb:74:in `require'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.1/lib/rails/commands.rb:74:in `block in <top (required)>'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.1/lib/rails/commands.rb:71:in `tap'
    from /home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.1/lib/rails/commands.rb:71:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

possible duplicate of execJs: 'Could not find a JavaScript runtime' but execjs AND therubyracer are in Gemfile — givanse
– givanse, Commented Nov 14, 2014 at 9:59

Community · Accepted Answer · 2017-05-23 12:14:44Z

3

try to install latest nodejs.

more details can be found here ExecJS and could not find a JavaScript runtime

edited May 23, 2017 at 12:14

CommunityBot

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answered Nov 16, 2013 at 21:07

Ivan Tarapon

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Comments

Prabhakar--PK · Accepted Answer · 2015-03-29 14:34:21Z

1

Ubuntu Users

I'm on Ubuntu 11.04 and had similar issues. Installing Node.js fixed it.

As of Ubuntu 13.04 x64 you only need to run:

 sudo apt-get install nodejs

This will solve the problem.

CentOS/RedHat Users

 sudo yum install nodejs

ALTERNATE SOLUTION Just add ExecJS and the Ruby Racer in your gem file and run bundle install after.

   gem 'execjs'

  gem 'therubyracer'

answered Mar 29, 2015 at 14:34

Prabhakar--PK

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