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A pure-JavaScript browser environment.
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= envjs : pilot fish =

env.js : A pure JavaScript browser environment.
Developed by John Resig (

Major Contributers:
Christopher Thatcher
Nick Galbreath
Steven Parkes

Early Contributers and Integrated Project Authors:
John Resig       (Envjs Prototype and Concept)
Yehuda Katz      (Early XHR Implementation)
Jon van Noort    (Early DOM Implementation)
David Joham      (Early DOM Implementation)
Scott Severtson  (Early DOM Implementation)
Steffen Meschkat (XPath Implementation)
Henri Sivonen    (HTML5Parser Implementation)

GitHub repositories:

Mailing List:

Lighthouse (Bug Tracking):

Original blog post:

Rhino (Java-based JavaScript engine)

= Guides and Apis =

Getting the code:

* Check the code out from git: git clone git://

* Build targets
    > ant   //(does all the following in order)
    > ant env-platforms 
    > ant console-specs
    > ant dom-specs
    > ant event-specs
    > ant html-specs
    > ant timer-specs
    > ant parser-specs
    > ant xhr-specs
    > ant window-specs

== src folder ==

    The source files for this project are organized by the conventions described 
    below.  All final sources are included here, including the massaged parser.
    Platform developers are welcome to use the src/env/ folder to consider a new 
== specs folder ==

    The 'specifications' are our best attempt at isolating some DOM Spec into 
    something we can measure via an existing implementation, namely Firefox, and
    which also allow us to pass the same tests in a Platform.

== a couple code conventions ==

 * Page width <= 80
 * 'Modules' are isolated as
    var A,B,C;
        A = ...;
        B = ...;
        C = ...;
 * Modules depend on each other in some order.  Many modules provide mix-ins to 
   enhance interfaces exposed in other modules.  events.js for example, provide
   dom 2 events for the dom.js module, adding addEventListener etc to the dom.  
   Here is the general hierarchy as proposed:
   dom.js |->event.js |->html.js |->timer.js |->parser.js |->xhr.js |->window.js   
   all together we also include what we believe is a platform specific module 
   that describes the interfaces that must be implemented in a platform specific
   api, and this lives in src/platform/(core|rhino).  
 * Variable naming should be short but complete words.
 * Module level internal functions should be prefixed and appended with __. 
   For example __example__.
== contributing tests with patches ==
    Each module has a spec in env-js/specs.  Most tests will run whether you
    load them in the file:, http:, or https:, though once you get to xhr.js 
    the tests will fail for the 'file:' protocol in firefox because of 
    permissions.  To run xhr.js and window.js specs, copy settings.js to 
    local_settings.js, update it, and run a local server to satisfy
    those urls included in the spec.js;
== Platforms ==

=== 1.3 ===
    Out of the box we have support for native platforms with rhino, nodejs, 
    python-spidermonkey, ruby-v8 (via therubyracer), and ruby-spidermonkey (via 
    johnson).  We hope to support php and perl as well soon.
    We hope to integrate a thin build and test wrapper for each platform which 
    is most familiar with its native build/test/install process so each platform 
    can feel closely integrated.  For now however each test target can be run
    independently the same way you run other scripts:
    envjs <platform> specs/<module>/boot.js
    where <module> is one of:
        console | css | dom | event | html | parser | timer | window | xhr
== 1.2 and lower ==
    Out of the box 1.2 and lower will only run on rhino.  Some support via ruby 
    was possible via steven parkes fork of envjs.

== Installing ==

=== 1.3 ===

0) common usage - 
     bin/envjs <platform> file0.js file1.js file2.js ... fileN.js
     - where <platform> is one of
        node | spyd | rhino | rhino-debug | johnson | rubyracer
1) fileX.js should be used to simply set window.location and do whatever 
   else your browser-javascript-loving-heart desires. For example
   window.location = '';

Thats its!  There are a lot of ways to use Envjs to be productive so enjoy!
=== 1.2 and lower ===

0) common usage - all you need is env.rhino.js and rhino js.jar
     java -jar js.jar -opt -1 myscript.js

1) Include the proper env.js file for your platform.
     load('env.rhino.js'); //if in a Rhino script

2) Tell env.js to load an HTML file from your file system that it should model:
     var someWindow ="some/file.html");
     window.location = "some/file.html";

   Optionally you can turn on/off settings by passing an options object:
        scriptTypes: {
            "": true,
            "text/javascript": true

All together, the steps could be:

   a) simplest method:
     window.location = "some/file.html";

   b) jQuery ready method:
     window.location = "some/file.html";

   c) Other JavaScript frameworks have their own methods of setup, but the general pattern is:
     // step 1: load env.js
     // optionally: load your framework(s)
     // step 2: tell env.js the base DOM to model
     // optionally: run any setup code for your framework
     // step 3: tell the framework that the document is loaded

    The window object can be re-used, for example when crawling
    window.location = "";
    window.location = "";

Testing jQuery Compatibility:
* run ./bin/ #runs 1.4.1 by default
* run ./bin/ 1.3.2
* run ./bin/ 1.3.1
* run ./bin/ 1.2.6
* Checks out the given jQuery tag from Subversion into test/vendor/jQuery/[version], 
  moves dist/env.rhino.js into the correct location in their tree, and runs the test suites.

== 1.3 change notes ==

    * Runs in Java, Nodejs, Ruby, and Python environments!
    * Commonjs support.  Just add envjs to your load path.
    * Rhino no longer needs to be run in non-optimized mode. ( yeah! )
    * XML Parser no longer uses e4x since it is not supported by V8 and 
     several other javascript engines.  We reintroduced the old xml parser 
     to allow simplified support across all engines.
    * Basic XPath support from googles ajaxslt project now included.
    * NodeList are live, meaning getElementByTagName returns a nodelist 
      which will change when node are added or removed from the document.
    * Reimplementation of Timer internals to allow
    * Cleaned up all jslint errors and 99.9% of warnings.
    * Added internal Category Logging implementation.

== 1.1 to 1.2 note ==

    The goal for refactoring 1.1.rcX to 1.2.X was primarily to isolate and 
    organize the code into more independent areas, provide behavior driven testing
    with tests that run on firefox for each module and it's dependencies.
    Java command line in 1.1:

    env.rhino.js can be run either with a "generic" version of the Rhino
    library (js.jar), or with the repackaged/extended version of Rhino
    supplied with env.js (env-js.jar).  If your application uses multiple
    windows, frames, or iframes, or if it depends on precise adherence to
    JavaScript object scoping in event handlers, you will have to use
    env-js.jar.  Simple applications may be able to run with the generic
    version of Rhino.
    The command line used for testing env.js can be found in build.xml,
    although the general form is:
         java -jar [jar file] [javascript file]
    Where "jar file" is either "dist/env-js.jar", "rhino/js.jar", or your
    local path to a different version of the Rhino js.jar file.  The
    "javascript file" is the path to the JavaScript you wish to execute.
    Changes with new timer code:

    Previously with envjs, you could call Java's thread sleep() method to delay 
    execution. This was mostly used in test suites. This may no longer work the 
    same since it will inhibit all events from firing. You can now use the 
    Envjs.wait(milliseconds) call to achieve an effect similar to calling sleep().
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