Post a Simple Polyline/polygon example for moving vertexs

[biggestdickus]

Do you have an example like cjmetacrawler's picture? Thou the Bezier example is pretty fancy, it is also too completed for me to break down for just a simple polyline or polygon. e.g. a need a simple 4 corner polygon that each vertex can be dragged. Also could you use old style function coding rather than => as I'm not use to that format yet.

Implement transforming tool #270 is CLOSED (2017) It's now 2021 and would be nice to get a very simple example. Thanks
Searching Google did not help.

Note: I like to mention that I just switched to Konva from Fabric.js because their polygon drag vertex example blows up if you flip it or mirror the polygon. I hope this is not true in Konva.