pub fn attach(wrapper: Element) -> Option<()> {

        let document = web_sys::window()?.document()?;

        let fetch_url = wrapper.get_attribute(AutocompleteAttr::FetchUrl.as_str())?;

        let display_input_id = wrapper.get_attribute(AutocompleteAttr::DisplayInput.as_str())?;

        let hidden_input_id = wrapper.get_attribute(AutocompleteAttr::HiddenInput.as_str())?;

        let currency_input_id = wrapper.get_attribute(AutocompleteAttr::CurrencyInput.as_str());

        let display_input = get_input_by_id(&document, &display_input_id)?;

        let hidden_input = get_input_by_id(&document, &hidden_input_id)?;

        let currency_input = currency_input_id.and_then(|id| get_input_by_id(&document, &id));

        let container = wrapper

            .query_selector(selectors::RESULTS_CONTAINER)

            .ok()??;

        let autocomplete = Autocomplete::<AccountSuggestion>::new(

            display_input,

            hidden_input,

            currency_input,

            container,

        let config = AutocompleteConfig::get(fetch_url);

        let ac = Rc::new(RefCell::new(autocomplete));

        attach_autocomplete(ac, config);

        Some(())

    }

pub fn get_input_by_id(document: &Document, id: &str) -> Option<HtmlInputElement> {

    document

        .get_element_by_id(id)?

        .dyn_into::<HtmlInputElement>()

        .ok()

}