A couple weeks ago members of the processing.js team including myself put together an online Processing-js editor. The editor is still in the early stages but it is the easiest way for developers and the general public to try processing-js. With a few lines of code and a button press, you can now execute your processing-js code without having to download or configure anything.
Wondering how we did it?
With the ability to execute processing-js code via the browser, anyone can easily make a sketch without having to set up their environment. Also, if you see a awesome sketch online and are wondering how it works you can simply ‘view source’ and copy and paste the code into the online sketch and play around.
In the future, we are hoping to add export/save functionality so that people can easily share their sketches with the world. For now, we encourage people to use pastebin and share links to their sketch code via twitter and other social media.
If you have any problems using sketch.processing.org or just questions or comments about processing-js feel free to join us on irc