Slovníček

Offline-first PWA with a hand-written sync engine

Full-stack app — from the design to the API.

Next.js
TypeScript
Dexie
Supabase
PWA

IndexedDB is the source of truth, not a cache. The hard part is a bidirectional sync engine: last-write-wins with per-table watermarks, and pull deliberately ordered before push so a stale offline edit can never overwrite a newer server row.

In use.

A review round: multiple choice first, then typing the answer, with a hint worth half the points.

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