An exciting feature of version 4 of Esri's JavaScript API is its support for 3D scenes. Let’s have a look at a basic 3D sample.
Note: Most of you have probably explored a 3D map like this one, though you may not be aware of all of the navigation options available to you. Read about the various mouse and keyboard controls and their associated effects in the documentation of the SceneView [1] class, and be sure to try them out!
Also note that in addition to the Open in CodePen option, the sample pages also offer an Explore in the sandbox option. This is Esri's own sandbox for experimenting with their samples, much like CodePen.