When should I use the spread operator in JavaScript?

When should I use the spread operator in JavaScript?

The spread operator is useful for expanding elements in an iterable, like arrays or objects. You can use it to copy, merge, or add elements.

Can you give me an example of merging two arrays using the spread operator?

Sure! You can merge two arrays like this: const merged = [...array1, ...array2]; This creates a new array containing elements from both.

What about using it with objects?

For objects, you can use it to create a new object by merging properties: const newObj = {...obj1, ...obj2}; This combines properties from both objects.

Are there any performance considerations I should be aware of?

Yes, while the spread operator is convenient, it can be less performant than traditional methods for large datasets due to the creation of new arrays or objects.