| ffetch | chaos-fetch | chaos-sw | chaos-proxy | chaos-proxy-go |
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A toolkit of production-ready fetch utilities and testing tools for JavaScript/TypeScript developers.
| Repo | Description |
|---|---|
| ffetch | Production-ready fetch wrapper with retries, backoff, and timeout handling. |
| chaos-fetch | Chaos-testing integrated directly into a fetch wrapper, for seamless testing. |
| chaos-sw | Service Worker for injecting network chaos into browser requests. |
| chaos-proxy | Proxy-based chaos testing tool to simulate network failures and latency. |
| chaos-proxy-go | Golang port of chaos-proxy. |
http-resilience is a cross-library correctness matrix that runs the same executable failure scenarios against popular fetch resilience libraries and records what actually happens.
This suite tests the libraries through some edge-case scenarios: retry recovery and exhaustion, cancellation during backoff, bulkhead queue aborts, hedging (all-branches-fail and timeouts), circuit breakers (half-open concurrency and retry accounting), request deduplication, POST body replay, Retry-After handling, total-timeout deadlines etc.
It documents the exact configuration, the expected response or error contract, any assertion failures, and a captured failure trace.
The results are published at https://fetchkit.org/http-resilience/
See the fetch-kit ecosystem in action with the Fetch Reliability Arena: a live benchmark that runs fetch, axios, ky, and ffetch side-by-side under identical chaos conditions (latency, failures, rate limiting) and compares reliability scores, error rates, and latency in real time. The chaos is provided by chaos-fetch under the hood.
Connect with other developers, ask questions, and stay updated on new releases in the Fetch-Kit Discord server:
All releases are automatically announced, and pinned messages in each channel help you get started quickly.
Created and maintained by Gabor Koos
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