From b42985a0ab6f4091d532e2d00fcb6a4362650a5e Mon Sep 17 00:00:00 2001
From: Xiaoji Chen
Override default event handling logic.
Customize the cursor based on interactivity.
Hover over counties to highlight counties that share the same name.
Render animation by updating GeoJSON data source.
Turn interactive features off/on.
Dynamically show/hide map layers and change color with Immutable map style.
Smooth animate of the viewport.