topic Re: Question about hitTest() in JSAPI v4.30 in ArcGIS JavaScript Maps SDK Questions

Question about hitTest() in JSAPI v4.30

Arne_Gelfert — Tue, 13 Aug 2024 22:20:16 GMT

Simple question(s) alert ! (Although some of you may find it vague or missing more detailed code. Unfortunately, I cannot paste all my code here.)

Why would hitTest() only return basemap hits as a result when I have several layers in my map? Do layers from a webmap brought into your app as Portal item work differently from those that are added as layers (Featurelayer/MapImageLayer) via URL?

I recently started transitioning from JSAPI 3.x (WAB-DE stuff) to 4.x (4.30) and might be stuck in some legacy way of thinking.

When I do this:

view.on("click", (event)=> { view.hitTest(event).then((response) => { // Hoping for some results from the layers in the map // but response.results include only the basemap. console.log(response.results.length) // = 1 }); });

When I try with options, and specifically list one of the layers in the map, I get the same result.

view.on("click", (event)=> { opts = { include: interesting_layer}; view.hitTest(event,opts).then((response) => { //Hoping for some results from the layers in the map; //But no! console.log(response.results.length) // still = 1 }); });

Where does interesting_layer come from? I currently loop through webmap layers once view has loaded and assign some names to key layers I want to interact with later.

var interesting_layer; view.when(function() { //The following is another simplified version of what's actually //defined in another function elsewhere webmap.layers.forEach(lyr => { if (lyr.title == 'layer_of_interest') { interesting_layer = lyr } });

Re: Question about hitTest() in JSAPI v4.30

UndralBatsukh — Tue, 13 Aug 2024 22:46:50 GMT

How are you creating an instance of the interesting_layer? What type of layer is it? The hitTest returns results for the layer types listed here in this doc: https://developers.arcgis.com/javascript/latest/api-reference/esri-views-MapView.html#hitTest

Re: Question about hitTest() in JSAPI v4.30

Arne_Gelfert — Wed, 21 Aug 2024 16:05:24 GMT

@UndralBatsukh Sorry about the late reply... how do I create the layer?

@Arne_Gelfert wrote:
Where does interesting_layer come from? I currently loop through webmap layers once view has loaded and assign some names to key layers I want to interact with later.

So, it's actually a sublayer from the web map of type 'map-image'. I figured that would work. But maybe ESRI is throwing me another curveball. I'll take another look when I get a chance. Thanks for chiming in.