fetch

This is an adapter for a fetch function available with windowobject. It adds very thin layer of code, but it will be more helpful with type system. fetch is a generic function where generic argument is a map of status code to JSON response. Take this for example

import { fetch } from '@hullo/browser';
​
fetch<{ 200: { ok: true }; 404: null }>(
  "http://example.com/api",
  { method: 'GET' }
)
  .withJSON
  .subscribe({
    next(response) {
      switch (response.status) {
        case 200:
          console.log(response.json.ok);
          // ^ response.json.ok will be of type `true`
          break;
        case 404:
          console.log(response.json);
          break;
      }
    }
  });

Fetch alone returns an observable releasing a single object made with status, statusText and headers. To get to the response body, you must pick a fetch with a body parser. This is what withJSON and alike properties are.

The module also exports shorthands created after decorators fetchWithJSON etc.