From: Florian Gilcher <flo@...>
Date: 2013-01-09T18:20:21+09:00
Subject: Re: Can I require an external .js file in Ruby


On Jan 9, 2013, at 12:54 AM, Hassan Schroeder <hassan.schroeder@gmail.com> wrote:

> On Tue, Jan 8, 2013 at 3:19 PM, Jeremy Bopp <jeremy@bopp.net> wrote:
> 
>>> Is there a way to include .js functions within my ruby script?
>> 
>> The Ruby interpreter can only directly run Ruby code.  Javascript is not
>> Ruby, obviously, so the only possible solution would be to find a way to
>> load a Javascript interpreter
> 
> e.g. `gem install johnson`  -- https://github.com/jbarnette/johnson
> 
> Note: haven't used this in a long time, so can't vouch for suitability
> for whatever particular purpose the OP has in mind.  :-)

There are multiple mature ways to embed a JS interpreter in Ruby:

  gem install therubyracer # V8 embedded in Ruby
  gem install therubyrhino # the same for JRuby, using Rhino

See https://github.com/cowboyd/therubyracer for the README

Be aware that this only gives you the javascript interpreter, not access to DOM manipulations etc.