IndexedDB là gì? Khi nào dùng thay localStorage?

IndexedDB là database NoSQL trong browser hỗ trợ: lưu structured data (objects, files, blobs), indexes, transactions, large data. Asynchronous, không block main thread.

Dùng khi cần: lưu > 5MB, query phức tạp, offline-first apps. Phức tạp hơn localStorage nhiều, có thể dùng thư viện như Dexie.js.

IndexedDB is a NoSQL browser database that supports: storing structured data (objects, files, blobs), indexes, transactions, and large data. It is asynchronous and does not block the main thread.

Use it when you need: storing more than 5MB, complex queries, or offline-first apps. It is much more complex than localStorage; consider using a library like Dexie.js.