Typescript | Pass type argument to another type with argument

Question

I would like to do something like below

type TypeA<T> = (initialValue: T) => { ... }

const someFunc: <T>(TypeA<T>) = (initalValue) => {...} // doesn't work

someFunc<string>('Hello World')

Not

const someFunc:TypeA<string> = (initalValue) => {...}

Is this feasible?

Thank you for your time!

Titian Cernicova-Dragomir · Accepted Answer · 2019-11-04 09:16:37Z

1

Your TypeA is a generic type (that happens to be a function). To assign a generic function, you should change the definition of TypeA:

type TypeA = <T>(initialValue: T) => {  }

const someFunc: TypeA = (initalValue) => { return {} }

answered Nov 4, 2019 at 9:16

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