Long press allows modification of current vertex

examples/draw-and-modify-features.js

@@ -71,4 +71,9 @@ typeSelect.onchange = function() {
   addInteractions();
 };
 
+// Avoid context menu for long taps when editing on mobile
+map.getTargetElement().oncontextmenu = function(e) {
+  e.preventDefault();
+};
+
 addInteractions();