A Backbone.js sync adapter that provides dual storage with localStorage caching and REST server synchronization.
Backbone.dualStorage is a drop-in replacement for Backbone.Sync that adds offline capabilities to Backbone.js applications. It automatically caches models and collections in localStorage while synchronizing with a remote REST server, enabling seamless data operations both online and offline. It solves the problem of maintaining data persistence and handling conflict resolution when network connectivity is unreliable.
Backbone.js developers building web applications that need to function reliably without a constant internet connection, such as mobile apps, progressive web apps, or tools used in areas with intermittent connectivity. It is also suitable for developers seeking to enhance existing Backbone applications with offline data caching and synchronization.
Developers choose Backbone.dualStorage because it integrates transparently as a sync adapter without requiring major code changes, offering automatic dirty tracking and conflict resolution. Its unique selling point is the dual storage system that provides flexible control over local and remote operations, with configurable offline detection and custom parsing for server data before local caching.
A dual (localStorage and REST) sync adapter for Backbone.js
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Automatically caches models in localStorage and allows create, update, delete operations while offline, with sync upon reconnection, as shown in the usage examples for handling offline changes.
Requires minimal code changes as a replacement for Backbone.Sync; just include the script and use Backbone normally, making it straightforward for existing projects.
Supports remote and local flags on models and collections to bypass caching or restrict to local-only operations, offering fine-grained control over data persistence.
Collections track dirty and destroyed models with methods like syncDirtyAndDestroyed() to flush changes, ensuring data integrity during offline periods without manual management.
Tightly coupled with Backbone.js, a legacy library with declining community support, limiting its relevance for modern frameworks like React or Vue.
Relies on localStorage which has strict storage limits (around 5-10MB) and a synchronous API that can block the UI, making it unsuitable for large-scale or performance-critical applications.
While it handles dirty tracking, the README does not detail advanced conflict resolution strategies, which might lead to data inconsistencies in complex multi-user scenarios.