Do Javascript promises block the stack

Question

When using Javascript promises, does the event loop get blocked?

My understanding is that using await & async, makes the stack stop until the operation has comp

Answer 1

An await blocks only the current async function, the event loop continues to run normally. When the promise settles, the execution of the function body is resumed where it stopped.

Every async/await can be transformed in an equivalent .then(…)-callback program, and works just like that from the concurrency perspective. So while a promise is being awaited, other events may fire and arbitrary other code may run.