mapOption = { {
        portalItem: { // autocasts as new PortalItem()
            portal: {
                url: \"https://localhost/portal/\"
            },
            id: \"e487c8e548a4474e8ff161563568aa98\"
        }
    }
}

// then we load a web map
var map = new Map(mapOption);
// and we show that map in a container w/ div
var view = new View(Object.assign({
            map: map,
            container: container
        }, viewOption));