An Implementation of ES Observables
Convert Node Streams into ECMAScript-Observables
JSS plugin for TC39 Observables support
Really simple observable values and computed observables
Convert Node Streams into ECMAScript-Observables
A helper for awaiting the results of one or more Observables
Observables and operators for RxJS
TKO Computed Observables
TKO subscribables and observables
React hooks for RxJS Observables. Simple, flexible, testable and performant.
flexible observables
Allows libraries to handle various caller provided asynchronous functions uniformly. Maps promises, observables, child processes and streams, and callbacks to callback style.
Jest plugin for asserting on Kefir Observables
Better observables for everyone
A WebSocket client for Sanity's Bifur real-time service. Communicates over JSON-RPC 2.0 and returns RxJS Observables.
Observables for node fs
Add async-await for-await loop support to RxJS Observables
Redux-inspired state management using Observables
A lightweight (~1kB) library for creating reactive observables via functions.
Create automatic spies from classes in Jest tests, also for promises and observables
Observables for extensions and accounts discovery
Create observables from HTML attributes.
Convert Node Streams into ECMAScript-Observables
Create automatic spies from classes in jasmine tests, also for promises and observables
Simple Reactivity
A thread-safe, async-compatible observable property implementation for Rust using Tokio
iNaturalist API bindings
A thread-safe observable property implementation for Rust
Observer
Reactive Extensions for the Bevy game engine
Observing and serializing mutations
Observing and serializing mutations
Rust Spectral Colorimetry library with JavaScript/WASM interfaces
Observability and tracing abstraction for Praxis AI agents
DSFB Structural Semiotics Calculus — typed residual sign framework, grammar FSM, endoductive operator, and provenance engine. Rust type-level realization of the DSSC formal calculus (Invariant Forge LLC, April 2026).
Runtime Agnostic Reactive Extensions
Observable arrays and hashes
Rails observer (removed from core in Rails 4.0)
Implementation of the Observer object-oriented design pattern.
Observer pattern for ruby
Official AWS Ruby gem for CloudWatch Observability Access Manager. This gem is part of the AWS SDK for Ruby.
DataMapper plugin for observing Resources
In-process telemetry based on observers
Official AWS Ruby gem for CloudWatch Observability Admin Service. This gem is part of the AWS SDK for Ruby.
Mongoid::Observer removed from Mongoid 4.0
Adds support for ActiveModel Observers
Disables observers during testing, allowing you to write model tests that are completely decoupled from the observer.
In charge of the observation of the code for hazards.
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