How do I get the layer ID of a layer on a map widget

[ShahranNewaz]

Hi, so I'm working on creating a custom widget that will export the data of a layer into a CSV file. But I'm stuck on the part where I have to retrieve the layer ID of the layer I want to export. This is how I'm trying to do it.

const featureLayer = jimuMapView.view.map.findLayerById('layerid') as esri.FeatureLayer;

 layerid is where the retrieved ID would go. Thx in advance.

[QunSun]

Hi ShahranNewaz,

Is your problem that you don't know the id of the layer to be exported? If you don’t know the layer id, how do you know which layer to export?

[JeffreyThompson2]

https://developers.arcgis.com/javascript/latest/api-reference/esri-Map.html#allLayers

The simplest way to find the id of a layer if you don't know it is to console log all layers and look through the results with your browser tools.

console.log(jimuMapView.view.map.allLayers)