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From LocalStorage to IndexedDB: Upgrading Your Web App’s Storage Game

Nemesis Blog
3 min readDec 1, 2024

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IndexedDB is a browser-based database that allows web applications to store large amounts of structured data directly on the user’s device. It’s part of modern browsers and is used to create offline-ready applications or improve performance by reducing server requests.

Key Points:

  • Client-Side Database: It’s for storing data in the browser, not on the server.
  • Large Storage: Unlike cookies or LocalStorage, it can store much larger amounts of data.
  • Structured Data: You can store complex objects, not just strings like in LocalStorage.
  • Asynchronous: Operations like reading and writing data happen asynchronously to avoid slowing down the browser.
  • Use Cases:
  1. Storing offline content for Progressive Web Apps (PWAs).
  2. Caching API responses.
  3. Keeping user preferences, game data, or form drafts locally.

Think of it like a mini-database inside your browser!

Getting Started

1. Connecting to IndexedDB

We can create connection like this

  • Creates or opens a database named "MyDatabase".

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