Function fetchWithRetry

examples/electron/offline-first/src/db/todos.ts:80–110

* Fetch with retry and exponential backoff. * Keeps retrying on network errors and non-OK responses so the app * degrades gracefully when the server is temporarily unreachable.

(
  url: string,
  options: RequestInit = {},
  retryConfig: { retries?: number; delay?: number; backoff?: number } = {},
)

 * degrades gracefully when the server is temporarily unreachable.
 */
async function fetchWithRetry(
  url: string,
  options: RequestInit = {},
  retryConfig: { retries?: number; delay?: number; backoff?: number } = {},
): Promise<Response> {
  const { retries = 6, delay = 1000, backoff = 2 } = retryConfig

  for (let i = 0; i <= retries; i++) {
    try {
      const response = await fetch(url, options)
      if (response.ok) return response

      console.warn(
        `Fetch attempt ${i + 1} failed with status: ${response.status}. Retrying...`,
      )
    } catch (error) {
      console.error(
        `Fetch attempt ${i + 1} failed due to a network error:`,
        error,
      )
      if (i >= retries) throw error
    }

    if (i < retries) {
      const currentDelay = delay * Math.pow(backoff, i)
      await new Promise((resolve) => setTimeout(resolve, currentDelay))
    }
  }

  throw new Error(`Failed to fetch ${url} after ${retries} retries.`)
}

// Schema — use ISO strings for dates (SQLite-friendly)
const todoSchema = z.object({