What are the common performance issues with event listeners?

What are the common performance issues with event listeners?

Common performance issues with event listeners include memory leaks, excessive event firing, and poor event delegation.

How can I prevent memory leaks with event listeners?

To prevent memory leaks, always remove event listeners when they are no longer needed, especially in single-page applications.

What is event delegation and how does it help performance?

Event delegation involves attaching a single event listener to a parent element instead of multiple listeners to child elements, improving performance.

Can you give an example of event delegation?

Sure! Instead of adding click listeners to each button, add one listener to the parent container and check the event target.