in order to make the fixjsstyle tool more useful to me (I'm using it to automatically format my code in VIM),
I've made a small patch to allow piping content to the binary on STDIN and redirect output on stdout.
The functionality is guarded behind a flag '--stdin', and lets you do the following:
cat dirty.js | fixjsstyle --stdin > clean.js
Would anyone else be interested in using this? It was a very small patch -- if this seems useful, I could try to submit it to the main repository.