Implement Event Emitter

Problem Overview

Implement a JavaScript EventEmitter class (or object) that supports the following methods: - subscribe(eventName, callback): Register a callback function to be called when the named event is emitted. Returns an object (or function) that allows unsubscribing. - emit(eventName, ...args): Trigger all callbacks registered under the given event…

• 3 candidate-reported follow-ups — the exact probes interviewers asked, with the trigger for each
• The rest of the problem statement — full requirements, constraints, and edge cases
• Approach and trade-offs — what passing candidates did, and the mistakes that sink people