Initialize modify interaction so it can only delete vertices, OpenLayers

Question

I want to initialize modify interaction in the way that the user can only delete vertices. I want to disable the other two functionalities which interaction offers like moving and adding new ones. Does anyone have some suggestion?

Answer 1

You can pass the altKeyOnly condition to the Modify interaction:

import { altKeyOnly } from "ol/events/condition";
import { Modify } from "ol/interaction";

const features = ...;   // get modifying features

const modify = new Modify({
    features: features,
    condition: altKeyOnly,
    ...
});

...