fetchWithHeaders.js

export function fetchWithHeaders(url: string, jwt: ?string = null, params: ParamType = {}) {
  const customHeaders = params.headers || {}
  const otherParams = omit(params, 'headers')
  const headers = {
    'X-Requested-With': 'XMLHttpRequest',
    'X-CSRF-Token': window.rippleCSRF,
    Accept: 'application/json, text/plain, */*',
    'Content-Type': 'application/json',
    ...customHeaders
  }
  if (jwt) {
    headers.Authorization = `Bearer ${jwt}`
  }
  const fetchParams = { ...otherParams, headers, credentials: 'same-origin' }
  if (params.data) {
    fetchParams.body = JSON.stringify(params.data)
  }
  return fetch(url, fetchParams)
}