json.http.js

global.JSON.get = makeMethod('GET')
global.JSON.post = makeMethod('POST')
global.JSON.put = makeMethod('PUT')

function makeMethod (method) {
  return function (url, options = {}) {
    const headers = { 
      ...options.headers,
      'Content-Type': 'application/json',
    }
    if (typeof options.body === 'object') {
      options.body = JSON.stringify(options.body)
    }
    return fetch(url, { ...options, method, headers })
  }
}