error "Accessor#set Assigning an instance of 'esri.layers.MapImageLayer' which is not a subclass of 'esri.Basemap'" while creating map from mapserver

bogind — Fri, 05 May 2023 05:25:10 GMT

Using version 4.26 through npm as an ESM module.
I came across this error and another somewhat unrelated question with a similar syntax helped me find my bug

Accessor#set Assigning an instance of 'esri.layers.MapImageLayer' which is not a subclass of 'esri.Basemap'

The code I tried to use was:

this.imageryLayer= new MapImageLayer({ url:"URL to a MapServer" }) this.map = new Map({ ground: "world-elevation", basemap: this.imageryLayer, })

The reason it failed, was because I didn't cast the MapImageLayer to a BaseMap.
This piece of code solved it:

this.imageryLayer= new MapImageLayer({ url:"URL to a MapServer" }) this.ImageryBaseMap = new Basemap({ baseLayers:[this.imageryLayer], title: 'Imagery', id:'imagery' }) this.map = new Map({ ground: "world-elevation", basemap: this.ImageryBaseMap , })

This isn't really a question, just added this here for anyone else who might look this up.

topic error "Accessor#set Assigning an instance of 'esri.layers.MapImageLayer' which is not a subclass of 'esri.Basemap'" while creating map from mapserver in ArcGIS JavaScript Maps SDK Questions

error "Accessor#set Assigning an instance of 'esri.layers.MapImageLayer' which is not a subclass of 'esri.Basemap'" while creating map from mapserver