mqemitter

MQEmitter is an opinionated message queue with an emitter-style API using callbacks, designed for Node.js. Current stable version is 7.1.0, requiring Node >=20. It supports topic matching with wildcards (+ and #) and configurable concurrency. Ships TypeScript definitions. Alternatives include Redis, MongoDB, and child-process backends. Good for in-process pub/sub with backpressure handling.