What is meant by callback function? What is its purpose?

410

Why is it necessary to capitalize component names?

455

What are state and props in reactjs? What is the difference between the two? Give a proper example of using state and props to elaborate the concept with complete source code?

441

Why do you need to use props.children?

400

What are pure components?

388

What are fragments?

495

What is arrow function in react? How is it used?

455

How is react different from angular?

455

What is the use of React.Children.map(props.children, () => )?

426

What can you do if the expression contains more than one line?

414

Which feature can we use to cause a component to render only when its id changes?

580

How it is different from other front end language?

387

What a setState is doing?

533

What are state and props in reactjs? What is the difference between the two?

483

What is jsx and how jsx can help applications in react.js?

570