Is it possible to pass type parameters to a generic parameter in Typescript?

Question

Is something like the following possible:

interface Foo<X> {
    bar: X<string, number>
}

I am assuming it is not possible, but Typescript's type system has suprised me before.

Answer 1

Just omit X on the interface level and define it on the property:

interface Foo {
    bar: X<string, number>
}