How to use loading modal

Hi there,

I'm trying to use this nice lib, however, I couldn't get working the "loading" modal. The example:
eModal.setEModalOptions({
        loadingHtml: '<span class="fa fa-circle-o-notch fa-spin fa-3x text-primary"></span><span class="h4">Loading</span>',
        ...
    });

Didn't helped me. Please, could you give a complete example of activate and hide the loading window?