topic Clone a FeatureLayer object in Arcgis 3.31 for javascript? in ArcGIS JavaScript Maps SDK Questions

Clone a FeatureLayer object in Arcgis 3.31 for javascript?

Phares_Andrew — Fri, 31 Jan 2020 20:43:05 GMT

The java api has a method to copy a FeatureLayer: FeatureLayer (ArcGIS Runtime SDK for Java 100.7.0) , but I can't find a similar method here: FeatureLayer (legacy) | API Reference | ArcGIS API for JavaScript 3.31 . How do I clone a FeatureLayer in Arcgis 3.31 for javascript?

Re: Clone a FeatureLayer object in Arcgis 3.31 for javascript?

RobertScheitlin__GISP — Fri, 31 Jan 2020 21:22:10 GMT

There is no such method on the clinetside JS API.

Re: Clone a FeatureLayer object in Arcgis 3.31 for javascript?

LeoLiu1 — Tue, 04 Feb 2020 05:37:57 GMT

Not sure the reason you want to copy a feature layer, you can try it in the JavaScript way:

var copiedFeatureLayer = JSON.parse(JSON.stringify(objFeatureLayer))

var copiedFeatureLayer = Object.assign({}, objFeatureLayer)

Re: Clone a FeatureLayer object in Arcgis 3.31 for javascript?

Phares_Andrew — Tue, 04 Feb 2020 19:45:06 GMT

I've tried cloning via the last method, but this.inherited(arguments) is undefined for the feature layer (and I'm not sure what I need to add to the copied feature layer to avoid this).

The reason I'm is that whenever I call 'featureLayer.clearSelection' or make a new selection on the layer with selectFeatures, the layer deletes the selected objects (instead of just clearing the selection). My solution to this was to try and restore a cloned copy of the layer after every new selection / clear.

Re: Clone a FeatureLayer object in Arcgis 3.31 for javascript?

LeoLiu1 — Wed, 05 Feb 2020 00:07:19 GMT

Hi Andrew,

Can you share a piece of your codes? Wondering you probably just need to keep a copy of the selected features. It's an array of Graphics.

Leo.

Re: Clone a FeatureLayer object in Arcgis 3.31 for javascript?

Phares_Andrew — Fri, 07 Feb 2020 20:56:11 GMT

That solved my issue – thank you!