OpenLayers Modify Feature - vertices selection example
vertices, digitizing, draw, drawing, select
Show a way to select the vertices of a selected feature using the
ModifyFeature control.
Clicking on a vertex will trigger an event you can register to to do
what you want with it. Use your browser dev tool console to spy the
events triggered.
It's still possible to drag the vertices around without triggering the
'vertexclicked' event.