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MQTT.js is a comprehensive MQTT protocol client library for Node.js and browsers, implementing MQTT 3.1.1 and 5.0 specifications. It provides core functionality for connecting to brokers, publishing/subscribing with QoS levels, keepalive management, and offline message queuing. The architecture features modular transport abstraction (TCP/TLS/WebSocket/platform-specific), event-driven design with TypedEventEmitter, and pluggable persistence via Store. Entry points include the main library (src/mqtt.ts), CLI tools (src/bin/*), and platform-specific adapters. The codebase demonstrates strong craftsmanship in handling protocol complexities, cross-platform concerns, and maintainable abstractions.
RATING:
MAINT: active
DRIFT: low
▸ 3 reusable components found
── end of results ──