Function getJSON

code/types/generics.ts:48–60

(config: {
    url: string,
    headers?: { [key: string]: string },
  })

namespace ddd {
  const getJSON = <T>(config: {
    url: string,
    headers?: { [key: string]: string },
  }): Promise<T> => {
    const fetchConfig = ({
      method: 'GET',
      'Accept': 'application/json',
      'Content-Type': 'application/json',
      ...(config.headers || {})
    });
    return fetch(config.url, fetchConfig)
      .then<T>(response => response.json());
  }

  type LoadUsersResponse = {
    users: {