Watchobserve

Watchobserve is a software library that provides reactive observation of data changes. It is designed to simplify the detection of mutations and events across data structures and streams, enabling applications to respond promptly to state updates.

Architecture: The library centers on two core concepts: Watcher and Observer. A Watcher subscribes to a data source and monitors it for changes, while an Observer emits change events to registered handlers. It uses a publish-subscribe model and supports hierarchical observers.

Key features include real-time change detection for objects, arrays, maps, and streams; debouncing and throttling to control event flow; backpressure-aware streaming; cross-language bindings; a lightweight footprint; and a declarative API that favors simplicity over boilerplate.

Usage examples, in plain form: watchobserve.observe(target, callback) or watchobserve.bind(target).on('change', cb). Options such as deep watching and debounce intervals (for example {deep: true, debounceMs: 100}) can be provided to fine-tune behavior.

History and status: Conceptualized in the mid-2020s as an open-source project, watchobserve has seen contributions from multiple developers and adoption in UI reactivity and data synchronization workflows. It remains a lightweight tool aimed at straightforward change observation rather than full state management.

See also: reactive programming, observer pattern, data binding, event-driven architecture.