Get the JSON data from a Response object.

getJSON.js

/**
 * Get the JSON data from a Response object.
 * @param {Response} response The Response object.
 * @returns {Promise} The JSON data or an Error.
 */
async function getJSON(response) {
  if (response.ok) {
    const data = await response.json();
    return Promise.resolve(data);
  }

  const { status, statusText } = response;
  const error = new Error(`${status} ${statusText}`);

  return Promise.reject(error);
}