Function parsePort

scripts/dev-safe.mjs:508–519

(value, fallback)

}

function parsePort(value, fallback) {
  if (value == null || value === "") {
    return fallback;
  }

  const parsed = Number.parseInt(value, 10);
  if (!Number.isInteger(parsed) || parsed <= 0) {
    throw new Error(`Invalid port: ${value}`);
  }

  return parsed;
}

/**
 * Build safe dev configuration (synchronous version).