💡 State vs. Props in React: A Common Interview Question 💡

If you're starting with React or preparing for an interview, you might come across this classic question: What's the difference between state and props? Let's break it down! 👇

🌐 State

• Internal data: Owned by the component that declares it.

• Component's memory: Holds data over time across multiple re-renders.

• Interactive: Can be updated by the component, and when updated, React re-renders the component to reflect changes.

🔗 Props

• External data: Passed down from a parent component.

• Read-only: Cannot be modified by the receiving component.

• Function parameters: Acts as a communication channel between parent and child components.

Here's a crucial point: If state from a parent component is passed as props to a child, when the state updates, both the parent and child components will be re-rendered. This ensures the child component stays in sync with the updated state. 🔄

🔑 Summary

• State makes components interactive.

• Props allow parent components to configure child components.

Next time you're asked this in an interview, you'll be ready to nail it! 🎯