Using Vue with Typescript to leverage generics for interfaces

What is the proper syntax for allowing any type that extends a base type in this specific scenario?

interface SomeBase {}
interface A extends SomeBase {}
interface B extends SomeBase {}

interface Foo {
 bar: // Can be an array of A or B
}

Is it simply bar: SomeBase[], or is there another way like bar: <? extends SomeBase>

I want to avoid using bar: A[] | B[] as there may be numerous interfaces and I prefer not to list them all out explicitly.

I couldn't find any clear documentation on how to define it as a variable within an interface.

typescripttypescript-generics

Answer №1

baz: SomeCustom[] would enable an assortment of various types within an array. To specify a singular type, it's best to use generics.

interface SomeCustom {}
interface X extends SomeCustom {}
interface Y extends SomeCustom {}

type Buzz <U extends SomeCustom> = {
 baz: U[];
}

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