What is the difference between the spread operator and the rest operator in JavaScript?

What is the difference between the spread operator and the rest operator in JavaScript?

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 the spread operator?

Sure! For example, const arr1 = [1, 2]; const arr2 = [...arr1, 3, 4]; // arr2 is now [1, 2, 3, 4].

And what about the rest operator?

The rest operator is used in function parameters. For example, function sum(...numbers) { return numbers.reduce((a, b) => a + b, 0); }.

So, can I use both operators in the same function?

Yes, you can! You can use the spread operator to pass arguments and the rest operator to collect them.