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Run JavaScript code from Ruby

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Joshua Peek ad9f73c7ee Merge test files		2011-09-13 10:00:30 -05:00
lib	Unbox mustang objects	2011-09-13 09:45:31 -05:00
test	Merge test files	2011-09-13 10:00:30 -05:00
.gitignore	Add Gemfile	2011-06-07 16:05:18 -05:00
.travis.yml	Lets be serious	2011-09-12 17:04:15 -05:00
execjs.gemspec	Automagic files	2011-09-12 16:59:53 -05:00
Gemfile	Only install johnson on 1.8	2011-09-13 09:47:28 -05:00
LICENSE	ExecJS 0.1.0	2011-03-10 17:38:33 -06:00
Rakefile	Formatting	2011-06-01 21:29:15 -05:00
README.md	Proper capitalization for SpiderMonkey	2011-06-18 13:32:26 -05:00

README.md

ExecJS

ExecJS lets you run JavaScript code from Ruby. It automatically picks the best runtime available to evaluate your JavaScript program, then returns the result to you as a Ruby object.

ExecJS supports these runtimes:

therubyracer - Google V8 embedded within Ruby
therubyrhino - Mozilla Rhino embedded within JRuby
Johnson - Mozilla SpiderMonkey embedded within Ruby
Mustang - Mustang V8 embedded within Ruby
Node.js
Apple JavaScriptCore - Included with Mac OS X
Mozilla SpiderMonkey
Microsoft Windows Script Host (JScript)

A short example:

require "execjs"
ExecJS.eval "'red yellow blue'.split(' ')"
# => ["red", "yellow", "blue"]

A longer example, demonstrating how to invoke the CoffeeScript compiler:

require "execjs"
require "open-uri"
source = open("http://jashkenas.github.com/coffee-script/extras/coffee-script.js").read

context = ExecJS.compile(source)
context.call("CoffeeScript.compile", "square = (x) -> x * x", :bare => true)
# => "var square;\nsquare = function(x) {\n  return x * x;\n};"

Installation

$ gem install execjs

License

Released under the MIT license. See LICENSE for details.