Show HN: Web-SQLite-JS – Persistent SQLite in the browser via OPFS

I built web-sqlite-js because I wanted an "out-of-the-box" way to use SQLite WASM with persistence.

While the official SQLite WASM build is excellent, setting it up with the Origin Private File System (OPFS), handling the Web Worker communication, and ensuring concurrency safety (Mutex) involves a fair amount of boilerplate.

This library handles: - *Worker Orchestration*: Spawns and manages the SQLite worker. - *Persistence*: Automatically uses OPFS for file storage. - *SharedArrayBuffer Support*: Required for high-performance VFS. - *Safe Concurrency*: A built-in Mutex ensures that SQL commands and transactions are executed sequentially even if called concurrently from the main thread.

It’s designed for "local-first" apps where you want the reliability of a relational database without needing a backend for every query.

GitHub: https://github.com/wuchuheng/web-sqlite-js Docs: https://web-sqlite-js.wuchuheng.com

I'd love to hear your thoughts on the approach or any feedback on the API design.