cloneElement Quiz

Test your knowledge of React cloneElement, including cloning elements, overriding props, children handling, key and ref behavior, pitfalls, and alternatives.

20 questions · free · answers explained

Start the quiz

All questions in this quiz

  1. What does cloneElement let you create?
  2. Why is cloneElement considered uncommon in modern React?
  3. What must the first argument to cloneElement be?
  4. What happens to props passed as the second argument?
  5. Does cloneElement modify the original element?
  6. What happens if null is passed as the props argument?
  7. How are new children passed to cloneElement?
  8. What happens if no new children are passed to cloneElement?
  9. What happens if props.key is passed to cloneElement?
  10. What happens if props.ref is passed to cloneElement?
  11. Which API is often used with cloneElement to transform children?
  12. Why can cloneElement make data flow hard to trace?
  13. Which alternative often makes data flow clearer than cloneElement?
  14. Which alternative can share data without cloning children?
  15. Why should dynamic child arrays be passed carefully to cloneElement?
  16. What does cloneElement return?
  17. Should you read and mutate the returned element object directly?
  18. Which scenario is a possible use for cloneElement?
  19. What happens to the element type when cloneElement creates a clone?
  20. What is the practical rule for cloneElement?

Prefer to read first? React interview questions with written answers.