kiss-01-everything_is_event-02-fetch.js

const API_URL = 'https://mysuperduperapp.com/api';

function parseResponse(response) {
  /** React on response event */
  return response.json();
}
function handleResponse(data) {
  /** React on successful parsing (job done) event */
}

fetch(API_URL)
  .then(parseResponse)
  .then(handleResponse);