this post was submitted on 21 Nov 2023
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JavaScript is an interpreted language, so no decompilation is necessary, although this is repeatable by using a Firefox user agent.
You can build a virtual machine in JavaScript and execute compiled code on it
Just because you can...
Oh yeah, you shouldn't. But people do this for fingerprinting, bot detection, and other "adversarial" scenarios where you really don't like the person executing your code. It's somewhat plausible Google would use this technique to do something scummy like this (although that is not the case).
Relevant article and a great read: https://www.nullpt.rs/reverse-engineering-tiktok-vm-1