Function throwIfInvalidParentURL

lib/internal/modules/esm/resolve.js:943–950

* Validate user-input in `context` supplied by a custom loader. * @param {string | URL | undefined} parentURL - The parent URL. * @returns {void}

(parentURL)

 * @returns {void}
 */
function throwIfInvalidParentURL(parentURL) {
  if (parentURL === undefined) {
    return; // Main entry point, so no parent
  }
  if (typeof parentURL !== 'string' && !isURL(parentURL)) {
    throw new ERR_INVALID_ARG_TYPE('parentURL', ['string', 'URL'], parentURL);
  }
}

/**
 * Resolves the given specifier using the provided context, which includes the parent URL and conditions.