Current ExecJS runtime does't support ES6

Question

rake assets:precompile for my rails project throws below error:

rake aborted! Current ExecJS runtime does't support ES6. Please install latest Node.js.

Below is the environment information:

rails -v
Rails 5.0.7

ruby -v
ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux]

node -v
v6.11.1

I tried reinstalling all my gems. But still, the error comes. OS is RHEL.

Answer 1

i had the same problem after upgrading autoprefixer-rails to Version 9.0.0. i fixed it by setting autoprefixer-rails to a pre 9 version:

gem 'autoprefixer-rails', '8.6.5'

in my Gemfile

Answer 2

There's been a similar issue opened in the Autoprefixer-rails gem regarding this error, but it was thrown from an ActionView Template. keep an eye out for a response from the contributor:

https://github.com/ai/autoprefixer-rails/issues/137

Answer 3

Replace therubyracer by mini_racer in Gemfile:

# gem 'therubyracer', platforms: :ruby
gem 'mini_racer', platforms: :ruby

And then:

$ bundle install

Answer 4

I had a similar problem after upgrading to Rails 5.2

The solution for me was to add this line

 # make the ExecJs use NodeJs
 ENV['EXECJS_RUNTIME'] = 'Node'

In this file

config/boot.rb

Then restart the rails server

Answer 5

Installing NodeJS solved my problem.