Mysterious compile error "Parsing error: Cannot read property 'map' of undefined" when not using map

Question

I created the following useToggle hook which does not make use of .map():

import { useState } from "react";

export const useToggle = (
  initialValue: boolean = false
): [boolean, () => void] => {
  const [value, setValue] = useState(initialValue);

  const toggleValue = () => setValue((prevVal) => !prevVal);

  return [value, toggleValue];
};

The TS compiler gives me the following error:

./src/Components/util/hooks/useToggle.ts
  Line 0:  Parsing error: Cannot read property 'map' of undefined

I've searched for the word map in the file like 10 times, but it's not there. Someone please reassure me I'm not going insane!

Answer 1

The solution was simpler than I imagined:

Step 1: delete node_modules

Step 2: npm install

Step 3: error gone