What is the difference between deep copy and shallow copy in JavaScript?

What is the difference between deep copy and shallow copy in JavaScript?

In JavaScript, a shallow copy creates a new object but copies properties as references, while a deep copy duplicates everything.

Can you give me an example of a shallow copy?

Sure! Using Object.assign() creates a shallow copy. If you modify a nested object, it affects the original.

And how do I create a deep copy?

You can use JSON.parse(JSON.stringify(obj)) for a deep copy, but it won't work with functions or undefined values.

Are there any libraries that can help with deep copying?

Yes, libraries like Lodash provide a _.cloneDeep() method for creating deep copies efficiently.