request-handler-simple.js

const refreshAccessToken = async () => {
  const response = await sendRefreshTokenRequest();
  if (response.code !== 200) {
    return false;
  }
  updateAccessToken(response);
  
  return true;
};

let response = await sendAuthorizedRequest();
if (response.code === 401) {
  const refreshed = await refreshAccessToken();
  if (!refreshed) {
    logout();
  }
  response = await sendAuthorizedRequest();
  if (response.code === 401) {
    logout();
  }
}