cloudflare-workers-miniflare

Overview

Miniflare 3 is the official Workers simulator. Per developers.cloudflare.com/workers, Miniflare 3 is built on top of workerd - the same runtime that serves production Workers traffic. This means local-mode behaviour matches prod with very high fidelity.

Three integration patterns:

1. wrangler dev (CLI; live-reload during dev).
2. Programmatic Miniflare (getMiniflare(); for integration tests).
3. @cloudflare/vitest-pool-workers (Vitest + in-process Workers; the recommended unit-test path).

When to use