Answer
Pub-Sub decouples senders (publishers) from receivers (subscribers) through a central event hub.
Useful for modular architectures, micro frontends, and Node.js event emitters.
Quick Answer
Pub-Sub extends Observer by adding a broker between publisher and subscriber — neither knows about the other directly. Publishers send messages to a channel; subscribers listen to channels. In JavaScript, this is implemented with an EventBus or EventEmitter where neither the publisher nor the subscriber holds a reference to each other. Even more decoupled than Observer.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ