# Envjs rubygem 0.1.4

**URL:** <https://www.ruby-forum.com/t/envjs-rubygem-0-1-4/184039>\
**Category:** Ruby\
**Created:** [February 24, 2010, 5:15am UTC](https://www.ruby-forum.com/t/envjs-rubygem-0-1-4/184039 "2010-02-24T05:15:27Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![thegoatboy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/9fc348/32.png) [@thegoatboy](https://www.ruby-forum.com/u/thegoatboy)\
**Post date:** [February 24, 2010, 5:15am UTC](https://www.ruby-forum.com/t/envjs-rubygem-0-1-4/184039/1 "2010-02-24T05:15:27Z")

</div>

envjs rubygem version 0.1.4 has been released!

- [http://github.com/smparkes/env-js](http://github.com/smparkes/env-js)
- [http://groups.google.com/group/envjs](http://groups.google.com/group/envjs)
- \<#envjs @ [irc.freenode.net](http://irc.freenode.net)\>

The envjs rubygem is a port of the env.js project based on the Johnson  
gem. The env.js project provides a mostly pure javascript implementation  
of the browser environment (e.g., the HTML DOM objects). More details on  
env.js are available at [GitHub - thatcher/env-js: A pure-JavaScript browser environment.](http://github.com/thatcher/env-js).

The original target of env.js was the Rhino javascript interpreter  
written in Java. The envjs gem uses the SpiderMonkey interpreter written  
in C/C++ via the Johnson gem.

The 0.1 release branch of the envjs gem is not integrated with the Java  
version. The 1.0 release branch is expected to be.

To install envjs, you may need to manually install a prerelease of the  
johnson gem, e.g.,

gem install johnson --prerelease

Simple examples are in the README at [GitHub - smparkes/env-js: A pure-JavaScript browser environment with early rubygem support.](http://github.com/smparkes/env-js).

This release represents a significant refactoring of the scope  
mechanisms used in env.js. The result is a significant increase in  
speed. A number of memory leaks were also fixed. Thanks to the great  
tests included with capybara, a number of DOM and event issues were also  
fixed,. This version of env.js is compatible with the capybara env.js  
driver support in git://github.com/smparkes/capybara.git.