Typed fetch with timeout

export async function fetchJson<T>(
  url: string,
  { timeout = 8000, ...init }: RequestInit & { timeout?: number } = {},
): Promise<T> {
  const controller = new AbortController();
  const timer = setTimeout(() => controller.abort(), timeout);

  try {
    const response = await fetch(url, { ...init, signal: controller.signal });
    if (!response.ok) {
      throw new Error(`Request failed: ${response.status} ${response.statusText}`);
    }
    return (await response.json()) as T;
  } finally {
    clearTimeout(timer);
  }
}