[Vuejs]-How to encrypt the Vue.js code after compiling the application?

I think you are talking about obfuscating your code.

In cryptography, encryption is the process of transforming information (referred to as plaintext) using an algorithm (called a cipher) to make it unreadable to anyone except those possessing special knowledge, usually referred to as a key. So encryption makes data “unreadable” whereas obfuscation makes it “difficult”.

There are several ways to obfuscate your code. Here’s an example: https://blog.jscrambler.com/how-to-protect-your-vue-js-application-with-jscrambler/