Obfuscation by using UglifyJS2

[skotchio]

I know that UglifyJS is good for minimization but I need to Obfuscate fully like Closure Compiler do. Is it possible with UglifyJS?

[Skalman]

What do you mean? I believe the goal of Closure Compiler is to minify, just like for UglifyJS.
That said, Closure Compiler has a setting "advanced", where it makes a lot of assumptions about the code in order to further minify, e.g. properties (my_var.my_property -> a.b). Is that what you mean by obfuscation?
UglifyJS doesn't support that - it acts similar to Closure's "simple" option.

[skotchio]

Thanks for the reply. Yes I mean this. Ok but does uglifyjs support mangle of "private" variables that starts with underscore?

There is pull request in uglifyjs #309
Can you apply this patch to uglifyjs2 ?

[Skalman]

You should probably separate "variables" and "properties". You're talking about "private" properties. As you can see from a the this comment on the pull request, a lot of assumptions have to be made about the code, probably breaking a lot of code. For code that's a bit more complex, "advanced" requires lots of annotations, and often compiling code twice breaks it.

E.g. the jQuery project decided that it wasn't worth trying to conform to how that works. If you need smaller code, consider refactoring by using "project-global" variables and functions.

[me-ascii]

+1 any updates?

[rvanvelzen]

UglifyJS does minification, not obfuscation.

As the main concern is about shorter property keys, I'm closing this in favor of #81.

[napstercake]

Maybe this can help to someone's that the bosses says: "Should be obfuscated". https://www.npmjs.com/package/obfuscator