There's been a lot of discussion about VM in developer communities lately, so I wanted to share my perspective.

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VM obfuscation is the most advanced form of code protection. It transforms your JavaScript functions into custom bytecode that runs on a virtual machine embedded in the output. The original logic is completely hidden — no JavaScript to reverse-engineer.

If you encounter any problems with VM obfuscation, please report them to See Before & After Example

Selectively VM-obfuscate only sensitive functions for optimal performance.

Why direct eval() disables VM obfuscation, and how to avoid the pitfall.

Declare strict mode so the VM compiles correct bytecode.

Tamper detection, anti-hooking, and anti-agent protection for the VM runtime.

What the VM keeps visible vs. hides, and how to protect function names.

Apply VM obfuscation from your build pipeline via the npm package.

Narrow down issues and report them with the information we need to fix.

More Details

There are a few more points worth noting. First, browser compatibility varies across different browsers. Second, performance optimization is crucial when handling large amounts of data. Finally, key management is also an important consideration.

This article was first published on JSVMP Blog. Reposting with attribution is welcome.

Reference: VM Obfuscation | Obfuscator.io Documentation