Do the JavaScript web APIs run on a different thread than the call stack thread?

Question

At 12:16 in the following video by Philip Roberts, he talks about the Web APIs and Node APIs running on different threads than the call stack, if I am understanding him correctly? So, is this correct, do the Web APIs and Node APIs run on different threads than the call stack and event loop?

If true, does this mean that they will run in parallel to JavaScript being executed in the call stack?

https://www.youtube.com/watch?v=8aGhZQkoFbQ

Answer 1

Short Answer: Yes.

As has been pointed out in the comments, Web APIs "are effectively threads" although with a different behavior and purpose.

And, finally, the result will still be accessed and limited by the single "threadedness" of the JavaScript runtime when whichever callback is pushed into the Call Stack.