CODEWITHSUNDEEP
typescripttypescript3.0
flq
flq

Reputation: 22859

How do I get the return type of a class method in TypeScript

In newer TypeScript versions (I think 2.8 onwards?), I can easily obtain the return type of a function:

function f() { return "hi"; }
type MyType = ReturnType<typeof f>; //MyType is string

But I can't figure out to get the same info from a class method…

class MyClass {
  foo() { return "hi"; }
}

How do I get the return type of (new MyClass()).foo() ?

Upvotes: 44

Views: 13032

Answers (1)

artem
artem

Reputation: 51669

To get property or method type, you can use indexed access type operator:

type FooReturnType = ReturnType<MyClass['foo']>;

Upvotes: 108

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