obfuscation - Which Javascript minifier (cruncher) does the same things that the one Google uses for its JS APIs? -

I am a Google Maps API (JavaScript) developer. I have noticed that Google uses a Javascript minifire which has the following features:

1. Collapses the variables, attributes, logic, class, function and method names that obscure the code (e.g. Function 1 -> A, Function 2 -> B, Function 3 -> C)
2. Some variables, Classes, Properties and Methods can be marked for not being crutched, hence its name is similar Has been written as the API manual.
3. It is run again in every enterprise of the API, such as a construction work, I noticed that due to crunched names changes from one version to another.

I have not found a javascript miner with all the features in it. Anyone know anyone?

Google has now used some other internal JavaScript with gifts.

It is under the name of everyone and earlier this month.