Web - Fetch API

The fetch function is a promise.

fetch(url, {
    body: JSON.stringify(data), // must match 'Content-Type' header
    cache: 'no-cache', // *default, no-cache, reload, force-cache, only-if-cached
    credentials: 'same-origin', // include, *omit
    headers: {
      'user-agent': 'Mozilla/4.0 MDN Example',
      'content-type': 'application/json'
    },
    method: 'POST', // *GET, PUT, DELETE, etc.
    mode: 'cors', // no-cors, *same-origin
    redirect: 'follow', // *manual, error
    referrer: 'no-referrer', // *client
    credentials: 'same-origin'
  })
  .then(response => response.json()) // parses response to JSON

Credentials are HTTP cookies, TLS client certificates, and authentication entries (for HTTP authentication). For CORS requests, use the “include” value to allow sending credentials to other domains:

• Using mode: “no-cors” will give you an opaque response, which doesn't seem to return data in the body. See Opaque Response

https://github.com/github/fetch

• fetch API
• https://fetch.spec.whatwg.org/