Does the EcmaScript specification indicate any restrictions on the process model used to implement the runtime?

Question

Does the EcmaScript specification indicate any restrictions on the process model used to implement the runtime?

For example, is an event loop required for a single thread from a thread that controls the run-time relationship with the operating system IO subsystems?

Answer 1

No, it does not say anything. Communication Runtime and IO are not even part of the language; they are implementation dependent objects.

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