---
title: "Comment by Ndeye Fatou Diop on \"Day 9 of 100days of code\" | Hashnode"
description: "Very cool post ! Way to go 💪. By the way you don’t need the key in the li inside the item : you already added it when doing the .map() 😊"
url: "https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854"
---

[Discussion](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0)

Comment [Day 9 of 100days of code](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0)

[Ndeye Fatou Diop](https://hashnode.com/@fatou)

[Jan 23, 2024](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854)

Very cool post ! Way to go 💪. By the way you don’t need the key in the li inside the item : you already added it when doing the .map() 😊

[chioma christopher](https://hashnode.com/@Kaylah)

[Jan 23, 2024](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854#reply-65b0473aa2d52e93da2597f4)

Thank you So much for this 🙏 . You mean at the point where I created a new Item component yeah? I see it now 🫂🫂🔥

[Ndeye Fatou Diop](https://hashnode.com/@fatou)

[Jan 23, 2024](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854#reply-65b048c9b651ab641bba1404)

[chioma christopher](https://hashnode.com/@Kaylah) Sure ! Yes you just need it here when you render the item inside a map

[chioma christopher](https://hashnode.com/@Kaylah)

[Jan 23, 2024](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854#reply-65b04a1c358b0c09755a2368)

Thank you so much I just updated it. Correct now?. [Ndeye Fatou Diop](https://hashnode.com/@fatou)

[Ndeye Fatou Diop](https://hashnode.com/@fatou)

[Jan 24, 2024](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854#reply-65b0bd0495d5ed231d2acf3d)

[chioma christopher](https://hashnode.com/@Kaylah) yep ! The way you can check is that normally if you don’t have the keys set up properly React should show an error in the console like « Warning: Each child in a list should have a unique “key” prop. ». If you don’t see it you’re good to go ☺️

[chioma christopher](https://hashnode.com/@Kaylah)

[Jan 24, 2024](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854#reply-65b0f6cb3455af42532c4e17)

Thank you so much for this. [Ndeye Fatou Diop](https://hashnode.com/@fatou)