can-local-store is a client-side data persistence library for the CanJS framework, providing a localStorage-backed database for `can/Map` and `can/List` instances. It enables developers to automatically serialize and deserialize data to and from the browser's `localStorage` API, making it easy to store and retrieve application state or user data directly in the browser. The current stable version is 1.0.1, last released in October 2017. Due to its age and lack of updates since then, the package is considered abandoned, with no ongoing development or maintenance. Its key differentiator was its deep integration with CanJS's observable data structures, allowing seamless persistence without boilerplate. However, modern CanJS applications or new projects would typically opt for more actively maintained state management solutions or direct `localStorage` wrappers.
npm install can-local-storeVerified import paths — ran on the pinned version, not inferred.
Demonstrates defining a CanJS Map-based model with `can-local-store`, then performing CRUD (Create, Read, Update, Delete) operations that persist data in the browser's `localStorage`.
Consider migrating to a more actively maintained client-side storage solution or a direct `localStorage` wrapper if starting a new project or updating an existing one.
Implement robust error handling around `localStorage` operations and consider alternative storage solutions (e.g., IndexedDB) for larger datasets. Monitor storage usage and prune old data.
For performance-critical applications or large data sets, use asynchronous storage solutions like IndexedDB or a web worker to offload synchronous `localStorage` operations.
Avoid storing sensitive information. For secure client-side storage, consider using HTTP-only cookies for authentication tokens or server-side storage for critical data.
Ensure all data intended for storage is JSON-serializable. Manually serialize/deserialize complex types to and from their JSON-compatible representations before interacting with the store.
Reduce the amount of data being stored, implement a caching strategy to only store essential data, or migrate to a different storage mechanism like IndexedDB for larger datasets. Ensure `localStorage.removeItem()` or `localStorage.clear()` is used for cleanup when data is no longer needed.
Before saving, ensure that any data passed to `can-local-store` (via `Map` or `List` instances) does not contain circular references. Manually transform the data to a non-circular structure if necessary.
Verify that `can-define` and other peer dependencies are installed and compatible with `can-local-store@1.0.1`. Ensure the `Map` is correctly extended with `can-local-store/map` and that the instance methods like `save()` are available on the created model instance.