Check if feature layer can be added before adding

[Aeseir]

Is there any way to determine if a feature layer can be accessed by the map before adding it?

In cases where a layer is a protected resource, I don't want it sitting in the layerlist with a warning that it is not accessable.

[Christer]

Hi, you can manually try load the layer before adding it to the map. if im not mistaken. 

Sample: 

import { whenOnce } from '@arcgis/core/core/reactiveUtils';

myLayer = new FeatureLayer(..)
whenOnce(() => myLayer.loaded == true).then(() => {
      console.log('All good');
      view.map.add(myLayer);
    });
myLayer.load();

[Aeseir · Accepted solution]

close @Christer , no need for whenOnce().

It ended up being along the lines of:

try {
   await layer.load();

   // execute rest of code
} catch (e) {
// manage exception
}