What are event listeners and how do they impact web applications?

What are event listeners and how do they impact web applications?

Event listeners are functions that wait for specific events to occur on web elements, like clicks or key presses.

Can you give me an example of how an event listener works?

Sure! For instance, you can use an event listener to change the color of a button when it's clicked.

What happens if I have too many event listeners on a page?

Having too many event listeners can slow down your web application, as each listener consumes memory and processing power.

How can I optimize event listeners in my application?

You can optimize by using event delegation, removing unnecessary listeners, and ensuring they are only active when needed.