A few days ago, I discovered jsFiddle, played a bit with it, found it great, got excited, browsed the doc, and found they provided a GitHub integration. I was starting to consider dropping Eclipse and using this new Web EDI, pretty raw but just fitting my needs, for my JavaScript work, hoping that, by some kind of black magic, I could commit my work from there to my GitHub repository and still be able to organize my project the way I wanted.
As it turned out, not only can't I commit anything from jsFiddle to GitHub, but the worst disappointment was to realize that they don't keep their word of adapting your JS project structure through a kind of manifest file. After a few unfortunate tries, I am now convinced you really need to make a silly directory with 4 files immutably named demo.ext. There is no way to follow my code's evolution in jsFiddle but to copy it as it evolves in this demo.js file the way I would in the jsFiddle window, or any other homemade page. So much for added value...
If you happen to nourish the same expectations I had a few hours ago, drop it. So far, jsFiddle just carries out the duties of a JS/CSS sandbox, the way the "W3schools Try it yourself" and a million others already met, with a few handy improvements such as saving your code or loading JS frameworks with a select box instead of a code html tag. Cute but disappointing.