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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:
Envjs Team

GitHub repositories:

Mailing List:

Lighthouse (Bug Tracking):

Build Status:

Original blog post:

Rhino (Java-based JavaScript engine)

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/test/spec.  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 and run a local server to satisfy those urls included in
    the spec.js;
== platforms ==

 Out of the box we have support for native platforms with rhino.  A spidermonkey
 port is also being widely used, and we hope to integrate into the main branch 
 or as a github plugin.
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:
     Envjs("some/file.html", {log: function(msg){ console.debug(msg) }});

3) Optionally trigger "document ready" events in one of these ways:

4) Start processing of window(s)' event queue:

All together, the steps could be:

   a) simplest method:

   b) jQuery ready method:

   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(s0
     // step 3: tell the framework that the document is loaded
     // step 4: Envjs.wait();

Note that env.js is currently limited to loading a single HTML page
from the original window.  If you are going to load multiple pages in
succession into the same window, load the first into a new window
object using

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.

== 1.1 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:

    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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