import dojo/_base/lang in angular 8

Question

Hi,

I'm unable to import dojo/_base/lang in my angular component. Is there any specific steps to do it.

I actually want to use lang.hitch to make it work for this issue Unable to access zoom level outside watchUtils.watch in ESRI

Thanks in advance!

ReneRubalcava · Answer

You don't need lang.hitch for this and we don't really recommend you use dojo libs for 4x development.

You have a couple of options here.

// fat arrow functions will use scope of parent
watchUtils.watch(this.mapView, "zoom", (zoom) => {
  this.zoomLevel = zoom;
});

// use native Function.bind()
watchUtils.watch(this.mapView, "zoom", (function(zoom) {
  this.zoomLevel = zoom;
}).bind(this));

Since you're using Angular, I assume you're using TypeScript, so fat arrow functions would be the best solution in that case.