I want to be able to see the automagic stuff in the windows, like the doctype and the javascript framework inclusion. I feel disoriented without it, and I don't think I trust the software to do it the way I want it done -- being able to see it on screen would make me more comfortable.

You've got the page only after adding "show/" after the link with the demo - http://jsfiddle.net/wr8qE/show/ - just look at the source.

The goal is to actually see the code working and remove the repetitive hassle

I made one like this a while ago, it is nowhere near as powerful as fiddle, but it helps me from time to time

http://pastebin.me/eab163a47b5838173c7d76f5f29cd6b1

Either I don't understand the point of this, or there's a bug in it. I went to the HTML window, entered <p>Hello, world</p> and then pressed [Run]. In the Result window, I got back:

   {"error": "Please use POST request"}

Is that what it should do?

Weird - it should only happen if page is reloaded and no POST request is send.

What browser/OS etc.?

BTW thanks for info

Firefox 3.5.2 on Ubuntu 7.10

contact us on http://twitter.com/js_fiddle - working on mine on similar system

Why does it do a server round trip every time you tell it to run something?

It is loading the example by submitting a form. The submit goes to an iframe which is by definition a sandboxed environment

What are some common examples where using a platform like this would be more efficient that doing in on a common HTML page elsewhere? Regardless, it's a beautiful little system.

People use these tools (another example is JS Bin[1]) to post little standalone examples to StackOverflow.

It's easier to use tools like this instead of creating a new file and then finding a good place to host it.

[1]: http://jsbin.com/

It's an incredible tool for screencasters (I used that for a "Introduction to jQuery"). Invaluable, really.

could you provide a link please?