Could you describe how to create an event emitter class in JavaScript, specifically focusing on the methods on, emit, and off?

Hard Difficulty

Hard questions require advanced understanding and critical thinking. Here, your problem-solving skills are key, as these questions often involve complex scenarios needing in-depth analysis and well-structured responses.

Javascript question

JavaScript questions test your proficiency with this versatile programming language. Demonstrate your understanding of language fundamentals, asynchronous programming, frameworks, and how you build dynamic web applications.

Here's a Hint

Focus on the publisher-subscriber pattern implementation, proper event handling, memory management considerations, and practical usage examples with the three core methods.