🧱Deep Dive into the DOM & Event Delegation

🌐 What is the DOM?

The DOM (Document Object Model) is how JavaScript interacts with your HTML.

Think of it like a live tree structure of your web page. Every tag is a node you can access and manipulate using JavaScript.

🧰 Basic DOM Manipulation

🖱️ Handling Events

You can listen to user interactions like clicks, input, submit, etc.

🚀 What is Event Delegation?

Event delegation is a technique where you attach a single event listener to a parent element, and that listener checks which child element triggered the event.

It’s useful when:

• You have lots of similar elements (e.g., buttons, list items)
• New elements are added dynamically
• You want better performance

🧪 Example Without Delegation (Inefficient)

✅ With Event Delegation (Efficient)

⚠️ Don’t Forget

• Event delegation uses bubbling phase, where events move up the DOM tree.
• Always use e.target to check which child triggered the event.
• Use .contains() or matches() to filter targets safely.

✅ Summary

✍️ Written By
Chaitanya Chopde

🌟 Inspired By
@devsyncin

Comments

[DevOps Fundamental]

Great post—really enjoyed your insights!

[Chaitanya Chopde]

Thanks ❤️