Falcor is a JavaScript library that models remote data as a single virtual JSON graph, providing a path-based query engine for efficient client-side data retrieval and updates. It represents multiple remote data sources as a unified document where entities are accessed via globally unique identity paths.
The system distinguishes itself by treating the remote data model as a virtual JSON resource, allowing the client to query specific paths without managing individual endpoints. It uses a reference-aware graph model to handle many-to-many relationships and prevents data duplication. Network efficiency is managed through time-windowed request batching and deduplication, merging multiple asynchronous requests into single calls.
The library includes a client-side data cache with support for functional reactive hooks, expiration control, and mutation-based invalidation. It further provides mechanisms for remote function invocation to execute transactional server-side operations and delivers data retrieval results through observable streams.