Only two are actual features, the other are extension, and all of them are not JavaScript-related.
Out of the last 15 posts of this author, 12 have been off-topic. Most of the others are AI slop.
Huh, using Rust's regex engine (without beckreferences and lookarounds) to achieve ReDoS immunity - nice idea 👍
It's incredible what the JS ecosystem can do nowadays, including seamlessly integrate other languages like that.