[Intro]

[Background Music: Friendly and engaging tone]

Instructor:

"Hi there, and welcome back!

So far, we’ve learned how state allows components to manage dynamic data. But what if two sibling components need to share the same state?

That’s where lifting state up comes in!

By the end of this lesson, you’ll understand:

✅ Why lifting state up is necessary for sharing data between sibling components.

✅ How to move state to a common parent component.

✅ A practical example: Building a temperature converter that syncs Celsius and Fahrenheit inputs.

Let’s dive in!"

1. Why Do We Need to Lift State Up?

Instructor:

"Imagine you’re building a shopping cart.

• The Cart Icon component shows the total items in the cart.
• The Product List component has an “Add to Cart” button.

These are sibling components, and they cannot share state directly. The solution?

✅ Move state up to their common parent component, so both siblings can access and modify it."