I've been working on a practical reference project for building modern web applications that demonstrates some patterns I rarely see documented well together:
- Service Worker First Architecture (not just PWA features)
- Offline data mutation batching with IndexedDB staging
- Multi-user optimistic concurrency control with 3-way merge
- Sophisticated testing with Docker Testcontainers, multi-layer coverage
- Hand-crafted VanillaJS (no framework dependencies)
The project focuses on being a learning resource rather than another framework. Everything is built to be readable and educational.
https://github.com/localnerve/jam-build
Would love feedback from other developers who've tackled similar offline-first challenges.
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