topic Map and MapView autocast in ArcGIS JavaScript Maps SDK Questions

Map and MapView autocast

Shimoorook — Tue, 22 Jun 2021 22:01:11 GMT

On the documentation it's written that the Map class is autocasted for MapView class.

However, when Map module isn't imported in the beginning of the code with "esri/map", it doesn't seem to work. Am I misunderstanding how autocast works or is this a bug?

Re: Map and MapView autocast

ReneRubalcava — Tue, 22 Jun 2021 22:08:11 GMT

Is there a particular way you're trying to create the map that doesn't work? I tried this basic example and the map works.

require(["esri/views/MapView"], (MapView) => { const view = new MapView({ container: "viewDiv", map: { basemap: "topo-vector" }, zoom: 4, center: [15, 65] }); });

Re: Map and MapView autocast

Shimoorook — Tue, 22 Jun 2021 22:11:47 GMT

Oh my bad..
My code was like below

require(["esri/view/MapView"], (MapView) => {

cost view = new MapView({

container: "viewDiv",

map: new Map({

basemap: "topo-vector"

zoom: 4,

center: [15, 65]

});

so when it's autocasted, there's no need to crate a new instance of the class and just provide the object with correct properties?

Re: Map and MapView autocast

ReneRubalcava — Tue, 22 Jun 2021 22:50:41 GMT

That is correct. In some cases you need to provide a "type", like for renderers, symbols, geometry, etc. Those cases should be in the doc .