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How do I use the spread operator with objects in JavaScript?

An example of an AI chatbot conversation about using the spread operator with objects in JavaScript.

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You

How do I use the spread operator with objects in JavaScript?

MagicBuddy
MagicBuddy

The spread operator allows you to copy properties from one object to another. For example: const newObj = {...oldObj};.

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You

Can I use it to merge two objects?

MagicBuddy
MagicBuddy

Yes, you can merge objects like this: const merged = {...obj1, ...obj2}; This combines properties from both.

😀
You

What happens if there are duplicate keys?

MagicBuddy
MagicBuddy

If there are duplicate keys, the last one will overwrite the previous one. For example: const obj = {a: 1, b: 2}; const newObj = {...obj, b: 3}; results in newObj being {a: 1, b: 3}.

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You

Are there any performance considerations?

MagicBuddy
MagicBuddy

Using the spread operator is generally efficient, but for very large objects, consider performance impacts and memory usage.

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