When should I use spread or rest in JavaScript?

Can you explain when to use spread or rest in JavaScript?

Sure! The spread operator is used to expand elements of an iterable, while the rest operator collects multiple elements into an array.

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

Absolutely! You can use the spread operator to combine arrays like this: const newArray = [...array1, ...array2];.

And what about the rest operator?

The rest operator is used in function parameters to gather arguments into an array. For example: function myFunc(...args) {}.

Are there any performance differences between them?

Generally, both operators are efficient, but the context of use can affect performance. It's best to choose based on readability and functionality.