let mut opts = web_sys::RequestInit::new();
    opts.method("GET");
    opts.mode(web_sys::RequestMode::Cors);

    let request = web_sys::Request::new_with_str_and_init(
        "http://api.ipify.org?format=json",
        &opts,
    )?;

    let window = web_sys::window().unwrap();
    let resp: js_sys::Promise = window.fetch_with_request(&request);

    let mut fut = wasm_bindgen_futures::JsFuture::from(resp);
    fut.poll();