Function doFetch

packages/react-async/src/useAsync.tsx:295–296

(input: RequestInfo, init: RequestInit)

  const accept: string | undefined =
    headers["Accept"] || headers["accept"] || (headers.get && headers.get("accept"))
  const doFetch = (input: RequestInfo, init: RequestInit) =>
    globalScope.fetch(input, init).then(parseResponse(accept, json))
  const isDefer =
    typeof defer === "boolean" ? defer : ["POST", "PUT", "PATCH", "DELETE"].indexOf(method!) !== -1
  const fn = isDefer ? "deferFn" : "promiseFn"