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Ubuntu 12.04 Rails Server Error EXECJS

Source: Internet
Author: User
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New apps are created, use Rails server to launch a look, oops! It turns out that there is no JavaScript running environment.

12 $ rails server  /usr/local/lib/ruby/gems/1.9.1/gems/execjs-1.4.0/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)

You need to refer to the two gems "Execjs" and "therubyracer" respectively, adding two lines to the Gemfile in the app and directory. The two gems will be quoted when this is started.

12 gem "execjs"  gem "therubyracer"

Restart the service everything is fine.

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