Exception after remove and add a layer to web map / javascript

Question

Hi,

Simple question: What is the correct way to remove a layer (ArcGISDynamicMapServiceLayer)?

We do constantly add and remove layers to/from a map object. We noticed that after remove and add there is an exception

Uncaught DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node.
 at Object._onLoadHandler (https://js.arcgis.com/3.17/init.js:1857:295)
 at HTMLImageElement.<anonymous> (https://js.arcgis.com/3.17/init.js:63:154)

What is wrong? What is the meaning?

RobertScheitlin__GISP · Answer

Piterson,

There does not seem to be anything wrong with what you are doing there. But I would re consider your workflow. Why is it necessary to try and hold on to a layer variable after it is removed from the map? This seems to me like a poor use of memory when you can destroy and reconstruct the layer as needed.

PitersonPaulgek · Answer

Thanks, Robert,

I see.

I noticed that we create the array as Object:

dictionaryLayers= {};

And after that put layers:

dictionaryLayers[layerName1] = layerGlobalVariable1;

RobertScheitlin__GISP · Answer

Piterson,

I have never had a need to add and remove a layer back and forth like that so I am not sure what is going wrong. I would always remove and recreate the layer personally.