Example http request code

http.js

class Http {

  static send(method, url) {
    const request = new Request(url, {method})

    return fetch(request)
      .then(response => response.json())
      .then(json => json)
  }

  static get(url) {
    return Promise.resolve(this.send('GET', url))
  }

  static post(url) {
    return Promise.resolve(this.send('POST', url))
  }

  static delete(url) {
    return Promise.resolve(this.send('DELETE', url))
  }
}