実行時エラー XMLHttpRequest is not definedはでるがコンパイルは出来た

module Main where

import Prelude

import Effect(Effect)
import Effect.Aff
import Effect.Console (log)
import Effect.Class(liftEffect)
import Data.Either
import Halogen.Aff.Util(runHalogenAff)
import Affjax(Response,printError)
import Affjax.Web as AX
import Affjax.ResponseFormat as AXRF
import Affjax(Error)

main :: Effect Unit
main = runHalogenAff $ do
fb <- AX.get AXRF.string "https://api.github.com/users/test";
case fb of
Left err -> liftEffect $ do
log $ printError err
Right x -> liftEffect $ do
log $ x.body

あと、この~>という記号はどういう意味か分かる人いますか
joinFiber :: Fiber ~> Aff