Efficient Event Handling with Event Delegation in JavaScript

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Event delegation is a powerful technique used extensively in JavaScript to manage events efficiently. It allows us to listen for events on parent elements instead of binding them to each child element, hence reducing the number of event listeners and improving the performance of our application.

Let’s dive deeper into what event delegation is and how it can be accomplished in JavaScript.

What is Event Delegation?

In simple words, event delegation is the process of handling events on a parent element instead of binding the event listener to each child element individually. In traditional event handling, we have to add an event listener to each element that we want to respond to.

const btn1 = document.querySelector('#btn1');
const btn2 = document.querySelector('#btn2');

btn1.addEventListener('click', () => {
  console.log('Button 1 is clicked!');
});

btn2.addEventListener('click', () => {
  console.log('Button 2 is clicked!');
});

This approach works fine for a small project, but when the number of elements increases, it becomes challenging to handle events efficiently. With event delegation, we can overcome this issue and make our code more scalable.

How to Implement Event Delegation in…