About Spidermonkey Playground
-----------------------------

This is a simple C/C++ command-line program that embeds SpiderMonkey
and exposes a number of the JSAPI's functions [1] to a Trusted Code
Base written in JS.  The goal here is to provide developers with an
easy way to explore and experiment with JavaScript security models in
a high-level language before actually implementing one in C/C++.

The playground currently includes a highly experimental implementation
of SecurableModules [2] that allows for the exportation of
functionality to a module via require(). It also includes a "membrane"
or "wrapper" [3] implementation that allows secure membranes to be
implemented entirely in JavaScript.  It's really just an exposing of
SpiderMonkey's JSClass/JSExtendedClass [4] to JavaScript, but it
should allow for pretty flexible enforcement of any kind of desired
security characteristic, from an Object-Capability Model like that of
Google Caja [5] to a read-only representation of a DOM structure.

[1] https://developer.mozilla.org/en/SpiderMonkey
[2] https://wiki.mozilla.org/ServerJS/Modules/SecurableModules
[3] https://developer.mozilla.org/en/XPConnect_wrappers
[4] https://developer.mozilla.org/en/SpiderMonkey/JSAPI_Reference/JSClass
[5] http://code.google.com/p/google-caja/