Error handling with an Arcgis Online map (javascript api 4.16)

Anonymous User — Fri, 02 Oct 2020 15:34:52 GMT

I have an Arcgis Online map which use refreshInterval for automatic updates.

I need to intercept an event when the network goes offline or online, like it’s done in the Map Viewer with the orange triangle at the bottom left (when I put the Network to Offline with Chrome developer tools):

I tried to capture an error event on the map and on the layers, but it’s not working (with javascript api 4.16, in angular):

const webMap = new this._WebMap({

portalItem: {

id: arcgisOnlineMapId

}

});

this.mapView = new this._MapView({

container: this.mapViewEl.nativeElement,

map: webMap

});

await this.mapView.when();

this.mapView.on('error', (error) => {

console.error(`mapView error: ${error}`);

});

this.mapView.map.layers.on('error', (error) => {

console.error(`layers error: ${error}`);

});

How can I do that ?

Same question for an event when the network comes back.

Thanks !

Re: Error handling with an Arcgis Online map (javascript api 4.16)

ReneRubalcava — Fri, 02 Oct 2020 16:54:15 GMT

This isn't really something you would check with the API. A more reliable way is to use the browsers native.onLine property and event listeners to manage this.

Navigator.onLine - Web APIs | MDN

topic Re: Error handling with an Arcgis Online map (javascript api 4.16) in ArcGIS JavaScript Maps SDK Questions

Error handling with an Arcgis Online map (javascript api 4.16)

Re: Error handling with an Arcgis Online map (javascript api 4.16)