How to extend ElementView in TS?

[igo]

I have a custom Element and ElementView like this:

class MyElement extends dia.Element {
    myModelMethod() {...}
}
class MyElementView extends dia.ElementView {
    myMethod() {
        this.model.myModelMethod(); // myModelMethod is unknown but works
    }
}

However if you use this.model in MyElementView it is not of type MyElement. Is it possible to set type of the model to have all benefits of Typescript?

[kumilingus]

You can redefine properties and methods in your custom view if needed.

class MyElement extends dia.Element {
    test() { return; }
}

class MyElementView extends dia.ElementView {
    model: MyElement;
}

const view = new MyElementView();
view.model.test();

Ideally, the ElementView should be a generic class. This could be perhaps changed to:

class ElementView<T extends Element = Element> extends CellViewGeneric<T> {
}

But more testing would have to be done to make sure it's not a breaking change (See this for more info).

[igo]

Thanks. This works:

model!: MyElement;

I totally agree that generics should be used here to enable proper OOP.