Unable to access zoom level outside watchUtils.watch in ESRI

MahaK — Thu, 04 Mar 2021 10:08:00 GMT

Hi,

My code is like below

watchUtils.watch(this.mapView, "zoom", function (zoom) {

this.zoomLevel = zoom;

});

I want to access this.zoomLevel outside the watchUtils block as and when it is triggered.

But it is giving undefined.

PS: I have tried getter setter methods, and this.zoomLevel is declared globally.still facing the issue.

Can anyone suggest the solution?

Re: Unable to access zoom level outside watchUtils.watch in ESRI

KenBuja — Thu, 04 Mar 2021 13:27:48 GMT

You have to use lang.hitch to make sure "this" is retaining the correct context when being used in the function

watchUtils.watch(this.mapView, "zoom", lang.hitch(this, function (zoom) { this.zoomLevel = zoom; }));