How does promise make code asynchronous?

Question

I know we all use promises to avoid function callback hell, but my question is where in the event loop the promise code runs and whether the code is really asynchronous.

Answer 1

How does promise make code asynchronous?

It doesn't.

A promise provides a standard interface (e.g. with a .then() method) for handling asynchronous functions.

If everything done inside a promise is non-asynchronous, then the code is still non-asynchronous.

const p = new Promise((resolve, reject) => {
  console.log(1);
  resolve();
  console.log(2);

});
console.log(3);

You can see, above, that the Promise is blocking just as any other non-asynchronous code is.