I'd like to get an example of 'attachMapLayer'.

[Myzik-Dev]

I'd like to get an example of 'attachMapLayer'.

I tested it with the following code, but the map is not shown.

const testMapLayer:MapLayerProps= {subLayers:[],formatId:"BingMaps",name:"Bing Maps: Aerial Imagery with labels",url:"https://dev.virtualearth.net/REST/v1/Imagery/Metadata/AerialWithLabels?o=json&incl=ImageryProviders&key={TestKey}",transparentBackground:false,isBase:true, visible: true};

style.attachMapLayer(testMapLayer,true);

I'd appreciate it if you could tell me the right way to use it.

[pmconne]

An example can be found in MapLayerTool.ts. Perhaps @RBBentley could supply a simplified example.
If all you want is to enable Bing maps, see Viewport.changeBackgroundMapProps.
Can you check the network tab and console for errors? key={TestKey} looks suspicious.

[RBBentley]

If you only want to turn on Bing map display you could do something like Viewport.changeBackgroundMapProps({}); I believe the default properties are bing maps with hybrid display. Or more explicitly you could use Viewport.changeBackgroundMapProps({providerName: "BingProvider", providerData: { mapType: 2 }}); - mapType 2 would be the aerial display mode.

[pmconne]

For reference: BackgroundMapType.Aerial.

[Myzik-Dev]

Thank you for your answer. 👍

It was my mistake.
It was a mistake that commented out the calling function.