Please check https://datalatitude.github.io/ArcGisJs/ for the interactive readme.
This ArcGIS API for JavaScript map consists of home button, scale bar, search widget, basemap gallery, legend, and map layer widget. This code allows you to insert ArcGIS REST API for more than one layer of feature services or map services on both 2D and 3D maps. These codes are modified from ArcGIS Developer - ArcGIS API for JavaScript.
The REST API for feature services are linked throguh ESRI Living Atlas posted by esri_demographics and lisa_berry. You may replace the URLs for feature services REST API with map services REST API.
ArcGisJsWebAppMapFeatureService2D.html: Please check the interactive map
<iframe src="https://datalatitude.neocities.org/ArcGisJsWebAppMapFeatureService2D.html" width="100%" height="700px"></iframe>ArcGisJsWebAppMapFeatureService3D.html: Please check the interactive map
<iframe src="https://datalatitude.neocities.org/ArcGisJsWebAppMapFeatureService3D.html" width="100%" height="700px"></iframe>ArcGisJsSwitch2d3d.html: Please check the interactive map
<iframe src="https://datalatitude.neocities.org/ArcGisJsSwitch2d3d.html" width="100%" height="700px"></iframe>