Building Offline-First Apps with Dexie.js and React

When I built PromptForge, one of the key requirements was offline resilience. Users should never lose their prompt drafts, even if their browser crashes or they lose internet connectivity.

This is where Dexie.js comes in — a minimal wrapper around IndexedDB that provides a clean, promise-based API.

Why IndexedDB over localStorage?

localStorage is synchronous and limited to ~5MB. IndexedDB is asynchronous, supports much larger storage, and can store structured data including blobs and files. The catch is its raw API is verbose and callback-heavy. Dexie.js solves this.