I found this project a few days ago while looking for a javascript logging framework. It looks slick, but I think I'll stick to my choice of using log4javascript due to it's support for logging to a server via AJAX -- this is a very important feature for a JS logging framework, as far as I am concerned.
Isn't this what Tapestry uses for client side error messaging? It's actually pretty useful for including in web-app frameworks: you can alert the developer to framework errors which might go un-noticed if just written to console.log. Of course you can disable in production.<p>On a side note, I've wondered how useful/practical server-side logging of js running client-side would be. For keeping track of what your users are doing, errors thrown etc.
It's nice, the only thing is, if your site's style sheet uses class names like "error", "debug" and so on, it will mess up the log window.<p>You have 2 options:
1 - modify your styles
2 - modify blackbird styles + code<p>I'll stick to console.log as well but a great tool nevertheless.
MochiKit has LoggingPane (works in IE):
<a href="http://mochi.github.com/mochikit/doc/html/MochiKit/LoggingPane.html" rel="nofollow">http://mochi.github.com/mochikit/doc/html/MochiKit/LoggingPa...</a>