https://assets-production.dnsimple.com/assets/site/utils/fetch-json-6fe13ebd.js

1/**
2 * Issues a same-origin XHR GET and resolves with the parsed JSON body.
3 *
4 * The site DNS-lookup endpoints gate on `request.xhr?`, so the request must
5 * carry the `X-Requested-With` marker; the JSON `Accept` header matches what the
6 * endpoints return. The promise rejects on a network failure or a non-2xx
7 * response so callers can treat both as a failed lookup. An empty or unparseable
8 * body on a 2xx response resolves to `undefined`.
9 *
10 * @param {string} url - The same-origin endpoint to query.
11 * @returns {Promise<*>} The parsed JSON body, or `undefined` when the body is
12 *   empty or not valid JSON.
13 */
14export const fetchJson = async (url) => {
15  const response = await fetch(url, {
16    headers: { Accept: 'application/json', 'X-Requested-With': 'XMLHttpRequest' },
17    credentials: 'same-origin'
18  });
19
20  if (!response.ok)
21    throw new Error(`Request to ${url} failed with status ${response.status}`);
22
23  const text = await response.text();
24
25  try {
26    return JSON.parse(text);
27  } catch (e) {
28    return undefined;
29  }
30};