How to ensure multiple LayerViews are ready

GaryB — Mon, 15 Mar 2021 03:26:13 GMT

Hi, I'm new to the JavaScript API and am trying to use client side layerviews. If I am working with multiple feature layers and want to make sure all of them are ready to use, is there an alternative to this nested ugliness?

view.whenLayerView(myFirstLayer).then(function (myFirstLayerView) { view.whenLayerView(mySecondLayer).then(function (mySecondLayerView) { view.whenLayerView(myThirdLayer).then(function (myThirdLayerView) { // now that I know all my layer views are ready I can do things with them }) }) })

I did see the following and was thinking it would be clearer to just to do this 3 times

var layerView = await view.whenLayerView(layer);

but got an error message that said "await is only valid in async functions and the top level bodies of modules". I saw the following at the top but don't really understand when I have to use it since most samples don't use it.

require([...], function (...) { (async () => {

Any help would be appreciated.

Thanks!

Re: How to ensure multiple LayerViews are ready

BlakeTerhune — Mon, 15 Mar 2021 14:32:03 GMT

Here's a solution from @ReneRubalcava

Solved: Re: When featurelayer done drawing - Esri Community

topic How to ensure multiple LayerViews are ready in ArcGIS JavaScript Maps SDK Questions

How to ensure multiple LayerViews are ready

Re: How to ensure multiple LayerViews are ready