api.js

import { stringify } from 'query-string';

const _fetch = (url, config) => {
  // Put query string params to url if query is given
  if (config !== undefined && 'query' in config) {
    url = `${url}?${stringify(config.query)}`;
  }

  return fetch(url, config).then(
    res => {
      if (res.ok) {
        return res.json()
      } else {
        console.log('Not ok response', res);
      }
    }
  ).catch(err => console.error('There was an error', err))
}

export const fetcher = new Proxy(_fetch, {
  get (receiver, name) {
    return (url, config) => {
      if (config === undefined) {
        config = {};
      }
      config['method'] = name.toUpperCase();
      return receiver(url, config);
    }
  }
});