---
title: "Comment by Saif Aljanahi on \"10 beginner mistakes React Developers do\" | Hashnode"
description: "Thanks Sandeep Gokhale for this great blog. btw u said "beware of deep copies" at pt.9, can you clarify it so I can understand it properly?"
url: "https://hashnode.com/posts/10-beginner-mistakes-react-developers-do/62ba8175f2e6c7d70c1252bc/comment/62bb81f97131dfe7a8b59f13"
---

[Discussion](https://hashnode.com/posts/10-beginner-mistakes-react-developers-do/62ba8175f2e6c7d70c1252bc)

Comment [10 beginner mistakes React Developers do](https://hashnode.com/posts/10-beginner-mistakes-react-developers-do/62ba8175f2e6c7d70c1252bc)

[Saif Aljanahi](https://hashnode.com/@saifaljanahi)

[Jun 28, 2022](https://hashnode.com/posts/10-beginner-mistakes-react-developers-do/62ba8175f2e6c7d70c1252bc/comment/62bb81f97131dfe7a8b59f13)

Thanks [Sandeep Gokhale](https://hashnode.com/@gokhale) for this great blog. btw u said "beware of deep copies" at pt.9, can you clarify it so I can understand it properly?

[Sandeep Gokhale](https://hashnode.com/@gokhale)

[Jun 29, 2022](https://hashnode.com/posts/10-beginner-mistakes-react-developers-do/62ba8175f2e6c7d70c1252bc/comment/62bb81f97131dfe7a8b59f13#reply-62bc5bf900cfcdff8e4d9ade)

Hi Saif, Glad you found it useful.

Speard operator is known for creating shallow copies of non primitives. Read about Deep Copy Vs Shallow Copy and you will understand.

If it helps you, I am happy to write a blog about this. Lemme know Saif.