I want to store some re-usable config object for a Playwright test.

This seems to be a very cumbersome way to get a type definition,

import { Page, expect } from '@playwright/test';

type PageMatchersFn = ReturnType<typeof expect<Page>>;
type ToHaveUrlParams = Parameters<PageMatchersFn['toHaveURL']>;
type ToHaveUrlOptions = ToHaveUrlParams[1];

const toHaveUrlOptions: ToHaveUrlOptions = {
  timeout: 20_000,
  ignoreCase: true,
};

I see an interface PageAssertions in the playwright/types/test.d.ts but it do not seem to be exposed

Expecting there may be a more straightforward solution