API 4: Add all layers from a feature service to map

LukasWürsch — Tue, 22 Jun 2021 14:51:54 GMT

Hello there

I want to load all layers of a Hosted Feature service using the JS Api 4. It is possible to add a single layer to the map like this:

layer = new FeatureLayer({ portalItem: { id: portalItemId } layerId: 0 }); map.add(layer);

Is there a way to list, or count all layers within a Hosted Feature Service (using JS API 4), so each of them could be added using new FeatureLayer?

Or is there a direct way to add all layers of a Hosted Feature Service to the map?

Kind Regards

Lukas

Re: API 4: Add all layers from a feature service to map

LukasWürsch — Wed, 23 Jun 2021 13:07:01 GMT

I figured out that this is possible to get the number of layers using the REST api and then add each layer individually. Please let me know in case there is a more direct way to achieve this.

// get number of layers in service let url = "...?f=pjson"; // Feature Service url from portal page esriRequest(url, { responseType: "json" }).then(function(response){ let responseJSON = response.data; let numberOfLayers = responseJSON.layers.length; // load each service layer for (let i = 0; i < numberOfLayers; i++) { layer = new FeatureLayer({ portalItem: { id: "..." }, layerId: i }); map.add(layer); } });

topic Re: API 4: Add all layers from a feature service to map in ArcGIS JavaScript Maps SDK Questions

API 4: Add all layers from a feature service to map

Re: API 4: Add all layers from a feature service to map