What are the uses of shallow and deep copy in JavaScript?

Can you explain the difference between shallow copy and deep copy in JavaScript?

Sure! A shallow copy creates a new object but only copies the references to the original object's properties. A deep copy, on the other hand, creates a new object and recursively copies all properties, ensuring that nested objects are also duplicated.

When should I use shallow copy instead of deep copy?

You should use shallow copy when you are dealing with simple objects or when you don't need to clone nested objects. It's faster and uses less memory.

What are some methods to create shallow and deep copies in JavaScript?

For shallow copy, you can use Object.assign() or the spread operator (...). For deep copy, you can use JSON.parse(JSON.stringify(obj)) or libraries like Lodash's cloneDeep().

Are there any performance considerations I should be aware of?

Yes, deep copying can be significantly slower and more memory-intensive than shallow copying, especially for large objects. It's important to choose the right method based on your use case.