JavaScript Concurrency Suspension

I've been sort of puzzling over what happens in the code with concurrency when I say suspend. Most co-routine systems work that way, right? Not, I can say most. They're different implementation technique like go just through just stacks or for example, the upcoming support for proteins in GBA,. The Project Blue use a different technique, yet another different thing, the copy stack to off storage and suspension. So I mean, those three approaches are probably generated like state machines like we do go approach and this is probably the three major ones.