What are the key features of IndexedDB?

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Ponu Maurya · Answer

Here are the key features of IndexedDB — a powerful browser-based storage system: Key Features of IndexedDB 1. Client-Side NoSQL Database IndexedDB stores data as key-value pairs.You can store JavaScript objects, not just strings. 2. Large Storage Capacity Supports tens to hundreds of MBs, depending on the browser.Much higher limit than localStorage (which is ~5MB). 3. Asynchronous API Most operations are non-blocking, using events or Promises.Prevents UI freezing during data access or heavy reads. 4. Structured Data Storage Supports complex objects, arrays, nested data.No need to serialize/deserialize with JSON.stringify(). 5. Indexed Object Stores Create indexes for fast lookup on specific fields.Example: search users by email or username. 6. Transactional Support All read/write operations happen inside a transaction.Ensures data integrity and consistency. 7. Versioned Database Schema Use onupgradeneeded to update structure (add object stores, indexes).Each schema change increases the version number. 8. Binary Data Storage Can store Blobs, ArrayBuffers, and Files.Useful for offline caching of images, audio, or video. 9. Works Offline Ideal for offline-first applications.Combine with Service Workers or Background Sync for robust PWAs. 10. Origin-Based Security IndexedDB data is isolated to a single domain or origin.Secure and sandboxed per website. 11. Event-Driven & Promise Support Originally event-based, but now widely used with Promise wrappers (like the idb library). 12. Supports Compound Keys and Key Paths Use object paths (like user.id) as primary keys.Supports auto-increment and composite keys. Example Use Cases Offline form submission queuesCaching API responsesStoring user sessions/profilesMedia storage (offline images, PDFs)Synchronization with a backend when online

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What are the key features of IndexedDB?

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Key Features of IndexedDB

1. Client-Side NoSQL Database

2. Large Storage Capacity

3. Asynchronous API

4. Structured Data Storage

5. Indexed Object Stores

6. Transactional Support

7. Versioned Database Schema

8. Binary Data Storage

9. Works Offline

10. Origin-Based Security

11. Event-Driven & Promise Support

12. Supports Compound Keys and Key Paths

Example Use Cases