Add feature layer back to map after removing it

ZianChoy — Thu, 07 May 2020 07:13:07 GMT

When I removed a feature layer with a heatmap renderer in the latest version of the 3.x JS API, nothing appeared in the map after adding it back.

You can reproduce the problem by going to https://developers.arcgis.com/javascript/3/sandbox/sandbox.html?sample=renderer_heatmap_weighted and making a tweak to the valCtrl.addEventListener function.

Insert the following as the first line in the function:

map.removeLayer(heatmapFeatureLayer);

And put this line right above the call to redraw():

map.addLayer(heatmapFeatureLayer);

Then, click the refresh button and try moving a slider or unchecking a checkbox in the map. Nothing will appear in the map.

In my real application, I have ~6 different groups of layers that get swapped in and out of the map depending on the displayed attribute. For instance, 1 group might show the "Geocoder" string attribute with only 1 layer and another group might show a "Derived Number" attribute with 3 layers.

What would be the best way to overcome this bug in the JS API?

Re: Add feature layer back to map after removing it

ZianChoy — Tue, 19 May 2020 16:35:54 GMT

ESRI support confirmed that this is a bug in the JavaScript API.

topic Re: Add feature layer back to map after removing it in ArcGIS JavaScript Maps SDK Questions

Add feature layer back to map after removing it

Re: Add feature layer back to map after removing it