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Symbols in JavaScript are used to avoid property name collisions in libraries, implement custom iteration behaviors, and customize object behavior, making them essential for robust and conflict-free code design.
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Event emitters decouple components, enabling scalable, event-driven architectures.
- UI interactions (clicks, form submissions)
- APIs/HTTP servers (request/response handling)
- Real-time apps (chat, notifications)
- Modular systems (plugins, micro-services)
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