topic Re: Getting a reference to a map object with dojo.byId in ArcGIS JavaScript Maps SDK Questions

Getting a reference to a map object with dojo.byId

JosephCox — Thu, 29 Nov 2012 15:41:10 GMT

I was wondering if there is a method to get a reference to the map object without having to have a global variable for the map. If you do: var x = dojo.byId("map") x is a reference to the DIV that contains the map but I don't know how to pull the map out of that, or if I should even be trying to reference the map in this way.

Re: Getting a reference to a map object with dojo.byId

MattO_Hara — Thu, 29 Nov 2012 17:16:20 GMT

I'm by no means a dojo expert but I don't believe it is possible to get the JavaScript object from the HTML element. The JavaScript map object contains a link to the HTML element that the map is in but the reverse is not true.

I've always just used a global variable called map in order to access it.

Re: Getting a reference to a map object with dojo.byId

derekswingley1 — Thu, 29 Nov 2012 18:44:29 GMT

We don't keep a reference to the map as a global variable anywhere. If you want to interact with your map at runtime via your browser's dev tools, make your map variable global. This is why we make the map a global var in most of our samples.

As you found out, dojo.byId returns references to dom nodes. Dijit.byId returns references to dijits but esri.Map is not a dijit.