asyncAwait.js

async function startCallbackHell() {
  try {
    const res1 = await callback1(params);
    const res2 = await callback2(res1);
    const res3 = await callback3(res2);
    const res4 = await callback4(res3);
    const res5 = await callback5(res4);
  } catch (error) {
    // Do something with the error
  } finally {
    // Do somthing after the try is executed, even if it gets an error
  }
}

const callback1 = async (params) => {
  // Actually do something
  return 'res1';
}

const callback2 = async (params) => {
  // Actually do something
  return 'res2';
}

const callback3 = async (params) => {
  // Actually do something
  return 'res3';
}

const callback4 = async (params) => {
  // Actually do something
  return 'res4';
}

const callback5 = async (params) => {
  // Actually do something
  return 'res5';
}

Why do you use const and not var or let ?

Values are constant and are not updated later in the code, you should use let only when the value of the variable is going to be updated in upcoming code and try to never use var.

Values are constant and are not updated later in the code, you should use let only when the value of the variable is going to be updated in upcoming code and try to never use var.

Understandable :D Thanks :D