How to write an asynchronous recursive function?

Question

JavaScript

How can an asynchronous recursive call be implemented?
It is necessary after receiving a response from each ajax request, using the results of the previous one, send a new one, and so on until a certain condition is reached.

Answer 1

For example use async/await:

async function foo(val = 0) {
  const response = await request(val); //предполагается, что request возвращает promise
  if (response.error) throw new Error('something bad happened');
  //делаем что-то с response
  foo(response.newVal); //вызываем foo с новым val
}

Answer 2

Promise