How to secure the Javascript Code? [duplicate]

Answer 1

All you can do is minify and obfuscate it.

Here is a free obfuscator, there are several around.

Answer 2

100% securing of JS code is impossible. Whichever popular packer you use, JSBeautifier is usually able to reconstruct a humanly-readable source from it. Personally, I only use Google Closure Compiler which is the best minifier/optimizer currently available.

Answer 3

First, obfuscate it - change functions/variables names to meaningless names. Then pack it using the packer.