Cloudflare Workers

Deploy JavaScript and TypeScript functions to Cloudflare's global edge network with sub-millisecond cold starts.

When to Use

• Building lightweight APIs and microservices at the edge.
• Adding middleware (auth, rate limiting, header injection) in front of origin servers.
• Running cron jobs on a schedule without maintaining infrastructure.
• Processing webhooks, image transformations, or A/B testing logic.
• Serving dynamic content from KV, D1, or R2 storage bindings.

Prerequisites

• Node.js 18+ installed locally.
• Wrangler CLI: npm install -g wrangler.
• Cloudflare account (free plan supports 100,000 requests/day).
• Authenticated: wrangler login or set CLOUDFLARE_API_TOKEN.