callbackHell.js

function startCallbackHell() {
  callback1(params, (error, response) => {
    if (error) {
      // Do something with the error
    } else {
      callback2({ response }, (error, response) => {
        if (error) {
          // Do something with the error
        } else {
          callback3({ response }, (error, response) => {
            if (error) {
              // Do something with the error
            } else {
              callback4({ response }, (error, response) => {
                if (error) {
                  // Do something with the error
                } else {
                  callback5({ response }, (error, response) => {
                    if (error) {
                      // Do something with the error
                    } else {
                      ...
                    }
                  });
                }
              });
            }
          });
        }
      });
    }
  });
}