Module type hint (namespace)

My dilemma lies in the process of importing a module and trying to typehint it within a function, yet I'm faced with this error message:

Cannot use namespace 'joi' as type

import joi from "joi";

export function init(cb: (joi: joi) => any) {
  let result = cb(joi);
  ...
}

Any ideas on how to resolve this issue?

Answer №1

joey is a variable (when the code runs, it will be an object that holds the exports from the module) if you need a type that matches the structure of the joey variable. You can achieve this by using typeof:

import * as joey from "joi";

export function initialize(callback: (_joey: typeof joey) => any) {
    let result = callback(joey);
}

Important: I changed the parameter name to _joey to avoid confusion with the scoping rules when using typeof.

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