I made a fairly interesting JS introspection tool about 8 years ago ... I used to use it all the time: https://github.com/kristopolous/_inject https://github.co

I made a fairly interesting JS introspection tool about 8 years ago ... I used to use it all the time: https://github.com/kristopolous/_inject https://github.com/kristopolous/_inject The idea is that you want to run arbitrary code at some random deep scope in the code or perhaps run some map/reduce/filter function over every time it goes in there and find the anomaly ... it was really useful in characterizing things like itemizing a frequency of failure and other things I guess I stopped dealing with. I think it can be expanded upon but never really seemed to go anywhere. (sorry if the code walk-through article doesn't work well on mobile and is not complete - I never finished it)