comparisons.js

const userProfileIsOldEnough = () => {
  return userProfile.age > 18;
}

export default { userProfileIsOldEnough };

random_file.jsx

import 'userProfileIsOldEnough' from 'comparisons.js';

const what = ({api}) => {
  const userProfile = api.fetchUserProfile();
  // Question: How can I allow userProfileIsOldEnough to access userProfile without
  // passing it as an arg?
  if (userProfileIsOldEnough()) {
    ...
  }
}