多种类型的打字稿联合

Question

All, I have 4 typescript classes that are very similar and I can pass any of the 4 classes to the same function. So my function signature looks like this.

foo(a:Plane |Rocket | Bird | Balloon) { dostuff;}

Is it possible to create a class or interface that is a union of all four

something like

class Flyer = Plane | Rocket | Bird | Balloon

Answer 1

You can create a type alias:

type Flyer = Plane | Rocket | Bird | Balloon;

This is only an alias; it will behave identically as if you had written it in its expanded form.