What is Proguard?

ProGuard is the most popular optimizer for Java bytecode. It makes your Java and Android applications up to 90% smaller and up to 20% faster. ProGuard also provides minimal protection against reverse engineering by obfuscating the names of classes, fields and methods.

How to use it in Cordova app?

I didn't find any plugins for it. So I've implemented it by myself and shared it on GitHub.

Feel free to use!