Parameter of generic type extends a class

Question

There is a class of type

Action

.
I need to declare a function such that it takes a parameter of a class which extends Action along with additional parameter . For ex:

class Abc extends Action {

    payload: any;

}

My actual function :

function xyz(action: Abc){

    // ...

}

But

action: Abc

should be generic something like

action: {payload: string} extends Action

Scenario (Optional):
I am struggling with this as ngrx 4 removed payload from Action but my older code expects it to have payload .

Answer 1

You had it almost right. Change it to this

private xyz = (action: { payload: string } & Action) => {
}

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