Typescript: Derive Interface from Function Definition

Question

I'd love to do something like this:

function myFunction(arg1: string, arg2: number): boolean {
    //some code here
}

interface myInterface {
    someOtherProperty: string
    myFunction: myFunction // should be the equivalent of (arg1: string, arg2: Number) => boolean
}

Is this possible?

Titian Cernicova-Dragomir · Accepted Answer · 2020-05-19 11:53:20Z

2

You can use typeof in a type context to get the type of any value:


function myFunction(arg1: string, arg2: number): boolean {
  return false;
}

interface myInterface {
    someOtherProperty: string
    myFunction: typeof myFunction 
}

Playground Link

edited May 19, 2020 at 11:53

answered May 19, 2020 at 11:23

Titian Cernicova-Dragomir

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1 Comment

T.J. Crowder Over a year ago

When you use it in a type context, that is. :-)

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