I’m not sure anyone else actually addressed your question directly which is code being viewed from the browser’s View Source command. As other have said, there is no way to protect javascript intended to run in a browser from a determined viewer. If the browser can run it, then any determined person can view/run it … Read more
First, you really need to keep in mind that it’s never impossible to reverse-engineer something. Everything is hackable. A smart developer using a smart IDE can already get far enough. Well, you can find here a list. ProGuard is pretty good. I’ve used it myself, but only to “minify” Java code.
Obfuscation: Try YUI Compressor. It’s a very popular tool, built, enhanced and maintained by the Yahoo UI team. You may also use: Google Closure Compiler UglifyJS UPDATE: This question was originally asked on 2008, and The mentioned technologies are deprecated. you can use: terser – more information in web.dev. Private String Data: Keeping string values private is a … Read more