fetch("..."); Promise {status: "rejected", result: "Fetch is not yet implemented"} = $1 If you use a fetch polyfill, it won't install itself because there'

fetch("..."); Promise {status: "rejected", result: "Fetch is not yet implemented"} = $1 If you use a fetch polyfill, it won't install itself because there's a native fetch. But the native fetch is only there to tell you that it's not really there.