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JavaScript: The Spread operator can be destructive.

While learning React, I was taught to use the spread operator to copy an array. This is not always a good idea.

Posted on Tuesday, April 12, 2022 @ 08:59 AM UTC by Kaine

Tags:

JavaScript
React

When updating the state in React I was taught to first copy the objects using the spread operator. However, this doesn't actually copy the objects, it just copies the reference of the object. ie, it's the same object! If you're unaware of it, this could catch you off guard.