What is the spread operator in JavaScript?

What is the spread operator in JavaScript?

The spread operator, represented by ..., allows you to expand iterable elements like arrays or objects into individual elements.

Can you give me an example of how to use it with arrays?

Sure! You can use it to combine arrays like this: const arr1 = [1, 2]; const arr2 = [3, 4]; const combined = [...arr1, ...arr2]; // [1, 2, 3, 4].

What about using it with objects?

With objects, you can merge them like this: const obj1 = { a: 1 }; const obj2 = { b: 2 }; const merged = { ...obj1, ...obj2 }; // { a: 1, b: 2 }.

Are there any limitations to the spread operator?

Yes, the spread operator only performs a shallow copy, so nested objects will still reference the original.