Stratified JavaScript

Samples & Presentations

EU Mozcamp interactive presentation slides, Prague 4. Oct '09.

FeedChumby (description)

Pi + Animation + Events (description)

Testsuite

How to use it

The easiest way to play around with SJS is to add the following include at the top of a html file:

<script type="text/javascript" src="sjs-loader.js"></script>

(You can grab the most recent version of the file sjs-loader.js here.)

When the document has loaded, sjs-loader will look for any script tags with type="text/sjs", and compile & execute them.

sjs-loader also makes available some library code for Ajax programming.

Implementation status

• Prototype nearing completion.
• Testsuite here
• JavaScript parity features still to be implemented:
  • break with label
  • switch/case/default DONE
  • object literals DONE
  • array literals DONE
  • ?/: DONE
  • void
  • for/in
  • throw/catch/finally
  • with
  • new with args DONE
  • instanceof
  • typeof DONE
  • delete
  • 'arguments' object
• Known bugs:
  • 'this' pointer is wrong in suspend block
  • 'new' and 'new_with_args' only work with 'normal' JS constructors
  • ||, && need to eval args in sequence (see testsuite no. 5 and 6)
  • Some pathological switch/case/default constructs have wrong behaviour (see testsuite no. 25)
  • finally block can be executed before suspend block has finished executing. remainder of suspend block should be aborted in this case
  • Weird inner function scoping bug (see testsuite no. 32)
• Stratified enhancements to be implemented:
  • |@| and &@& operators (parallel OR / parallel AND)
  • concurrent iteration feature
  • statement expressions
  • protected expressions