Is it possible to generate a short share URL for a web map in ArcGIS Online Map Viewer?

Answer

No, it is not possible to obtain a short share URL for a web map in the new ArcGIS Online Map Viewer. To generate a short share URL for a web map, open the web map in Map Viewer Classic. Refer to ArcGIS Online: Link to a map for steps and browse through the page for more information.

In the Share window, copy the short URL in the Link to this map section.

Note:
As an alternative, in the new Map Viewer, copy the long URL that displays in the web browser address bar.