How do I use the spread operator in JavaScript?

How do I use the spread operator in JavaScript?

The spread operator, represented by ..., allows you to expand elements of an iterable (like an array) into individual elements. For example, you can use it to combine arrays or to pass elements as arguments to a function.

Can you show me an example of combining two arrays using the spread operator?

Sure! Here's an example:

const array1 = [1, 2, 3];
const array2 = [4, 5, 6];
const combined = [...array1, ...array2];
console.log(combined); // Output: [1, 2, 3, 4, 5, 6]

What about using it with objects?

Great question! You can also use the spread operator with objects to create shallow copies or merge objects. For example:

const obj1 = { a: 1, b: 2 };
const obj2 = { b: 3, c: 4 };
const merged = { ...obj1, ...obj2 };
console.log(merged); // Output: { a: 1, b: 3, c: 4 }