> Then you need to debugger your code, compiled code, sourcemap files, compiler, compiler options, the layer and layers of configuration JSON scripts and mobile browser.

This seems like you're deliberately trying to make things sound way more complicated than they actually are. If there is a bug in the code on a certain platform, you examine the bug on that platform and add the appropriate feature detection code to fix it. There is no need to debug the compiler and every other tool in your stack, it all compiles to javascript at the end of the day and assuming you're not running a minifier in development, 99% of platform specific bugs are readily apparent and almost certainly the developer's fault (i.e. not the tool's fault)