realm/realm-js
Realm Js
Realm is a mobile database: an alternative to SQLite & key-value stores
Features
- Mobile - Saves structured application data directly on-device for fast access and offline use.
- JavaScript - Stores and queries structured data locally on mobile devices using an object-oriented JavaScript API.
- Mobile Database Cross-Client Sync - Keeps local database changes in sync across multiple clients through a remote backend.
- Live Query Engines - Returns auto-updating query results that reflect the latest database state without manual re-execution.
- Structured Object Persistence - Persists structured objects and relationships on-device without requiring a network connection.
- Mobile Databases - An object-oriented database for mobile apps that stores structured data locally on-device.
- Object-Oriented Mobile Database Management - Stores and queries structured data locally on mobile devices with an object-oriented interface.
- Offline-First Persistence - Provides local data persistence and synchronization for offline-first mobile applications.
- Auto-Updating Query Results - Returns auto-updating collections reflecting the latest state without manual re-execution.
- Live Query Result Sets - Returns auto-updating collections reflecting the latest database state without manual re-execution.
- Real-time Data Synchronization - Propagates local database changes to a remote backend and other connected clients automatically.
- Live Update Subscriptions - Subscribes to live updates on query results so the UI automatically refreshes.
- Mobile Database Sync - Replicates local changes to a backend server and merges updates from other clients.
- Data Change Notifications - Subscribes to notifications when local or synced data is created, modified, or deleted.
- Mobile Database Cores - Shares a single C++ database engine across iOS and Android with JavaScript bindings.
- Cross-Platform Database Kernels - Runs a unified C++ database core with JavaScript bindings on both iOS and Android.
- Object Schema Definitions - Declares the shape of persisted data with typed fields, relationships, and indexes.
- Class-Based Schema Mappings - Defines the shape and constraints of persisted data through class-based schemas.
- Fluent Query Builders - Provides a fluent query builder with comparisons and logical operators for local database queries.
- Zero-Copy Mappings - Maps database rows directly to live JavaScript objects without serialization overhead.
- Expressive Local Query Builders - Retrieves stored objects using expressive filters, sorting, and relationships without raw SQL.
- Schema Migrations - Transforms existing data when the object schema changes, preserving stored information.
- Type-Safe Query Builders - Filters, sorts, and aggregates stored objects with compile-time type safety.
- Object Property Deferred Loading - Defers object property loading until first access, minimizing memory for large result sets.
- Unified Sync Protocol Multiplexing - Combines local persistence and remote sync into one unified data flow over a custom protocol.
- Atomic Delta Broadcasts - Groups mutations into atomic transactions that broadcast delta updates to all active subscriptions.
- Real-time Sync Engines - Replicates local database changes to a remote backend and merges updates from other devices automatically.
- Local Storage - Mobile database alternative to SQLite and key-value stores.
- Native Libraries - Mobile-first database alternative to SQLite.
- React Native Libraries - A mobile database: an alternative to SQLite & key-value stores
- मोबाइल डेवलपमेंट - Mobile-first database for React Native.
- Mobile Libraries - Listed in the “Mobile Libraries” section of the Awesome React awesome list.
