Fetch and validate JSON (the fetch wrapper that I write over and over again)

fetchJson.js

async function fetchJson(url, options, validate) {
  const response = await fetch(url, options);
  let json;
  let jsonError;
  try {
    json = await response.json();
  } catch (error) {
    jsonError = error;
  }

  if (json && validate) {
    validate(json);
    return json;
  }

  if (!response.ok) {
    throw new Error(`Unexpected Status: ${response.status}`);
  }

  if (json) {
    return json;
  }

  throw jsonError;
}

// Use like this:
const json = await fetchJson('https://api.github.com/users/MoritzKn', null, (json) => {
  if (json.message) {
    throw new Error(json.message);
  }
})