Node.js Typed Data Fetching

Fetch remote data in Node.js with TypeScript using generic HTTP wrappers, retry logic with exponential backoff, response parsing with Zod, and.

Typescript Node Data Fetching Updated: 2026-01-15

Code

snippet

import { z } from 'zod';

async function fetchWithRetry<T>(
  url: string,
  schema: z.ZodSchema<T>,
  retries = 3,
): Promise<T> {
  for (let i = 0; i < retries; i++) {
    try {
      const res = await fetch(url, { signal: AbortSignal.timeout(5000) });
      if (!res.ok) throw new Error(`HTTP ${res.status}`);
      return schema.parse(await res.json());
    } catch (err) {
      if (i === retries - 1) throw err;
      await new Promise((r) => setTimeout(r, 2 ** i * 1000));
    }
  }
  throw new Error('Unreachable');
}