What are the best practices for deep merging objects in JavaScript?

What are the best practices for deep merging objects in JavaScript?

When deep merging objects, it's important to ensure that you handle nested structures correctly. Use libraries like Lodash or implement a recursive function.

Can you explain how to use Lodash for deep merging?

Sure! You can use _.merge() from Lodash. It recursively merges own and inherited enumerable string keyed properties of source objects into the destination object.

Are there any performance considerations I should be aware of?

Yes, deep merging can be performance-intensive, especially with large objects. It's best to limit the depth of merging and avoid unnecessary merges.

What if I need to merge arrays as well?

For arrays, you might want to customize the merge behavior. Lodash's _.merge() will concatenate arrays by default, but you can override this behavior if needed.