IOS does indeed have some solutions as a quick Google search turned up. Looks like the easiest to implement is a proxy to your UIWebView which can intercept the error and gives you the opportunity to surface it to the end user.

Take a look at this SE answer: http://stackoverflow.com/a/193282/467386 There also seems to be a drop-in already created that will do this on github: https://github.com/PabloGS/UIWebView-Debug though it's 2 years old. On the plus side, that means it doesn't require iOS7, which is a good thing.

The author of CodePad (Mojocat) has been quite responsive, and he has figured out a way to achieve js error reporting in iOS6. Might be worth exchanging knowledge... http://mojocatplay.com/contact/

Hi Alex, thanks for the quick response!

Yep, I am loading FBLite from CDN or local lib if it exists. And HTML debug=true. I load it before anything else in the HEAD. However, syntax errors in any js scripts referenced in that HTML doc still do not show any results in the FBLite console. Do you get different results when you try the same thing?