Why are keys important in react?

Related questions

1. How do you define a map?
2. What is the use of hashing?
3. What do you mean by hashing?
4. What is react router?
5. What is key in react?
6. What is a good hash function?
7. Is map a collection?
8. What is a data hash?
9. What is the difference between map and filter?
10. What is refs in react?

Tags

1. #array
2. #component
3. #important
4. #dynamically
5. #different
6. #children
7. #components
8. #constant
9. #unique
10. #identify
11. #whether
12. #react
13. #attribute
14. #created