Callback hell

callback-hell.js

import xhr from 'xhr';

const config = { url: '/api/resource' }

xhr(config, response => {
  xhr(config, response => {
    xhr(config, response => {
      xhr(config, response => {
        xhr(config, response => {
          xhr(config, response => {
            xhr(config, response => {
              console.log(response);
            }, error => {
              console.log(error);
            });
          }, error => {
            console.log(error);
          });
        }, error => {
          console.log(error);
        });
      }, error => {
        console.log(error);
      });
    }, error => {
      console.log(error)
    });
  }, error => {
    console.log(error)
  });
}, error => {
  console.log(error)
});