Determine the data type of the property in an object that needs to be provided as an argument to a

I am currently in the process of creating a function that can take in an object with a specific data type, as well as a function that acts on that data type as its argument.

const analyze = <
  Info extends object,
  F extends {initialize: Info; display: (info: Info) => any}
>(
  component: F
) => {}

However, when I attempt to utilize this function, TypeScript only recognizes the general object data type that is extended by the Info, rather than the actual structure of the data within the property:

analyze({
  initialize: {name: 'Alice'},
  display: (information) => {
    // Error: Property 'name' does not exist on type 'object'
    return information.name
  }
})

Link to TypeScript Playground

How can I define Info so that TypeScript accurately infers its structure?

typescripttypescript-genericstype-inference

Answer №1

C isn't necessary to be a type parameter; it can simply be the type of component:

const example = <
    Data extends object
>(
    component: {init: Data; serialize: (d: Data) => any} // <====
) => {
};

example({
    init: {opa: 'super'},
    serialize: (data) => {
        return data.opa;
    }
});

Playground link

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