Spread Operator

The Spread Operator is composed of three dots, ....

• The spread operator is used to 'spread' elements of an array or object.

• It is mainly used for merging or copying arrays or objects.

Copy
const arr1 = [1, 2, 3];
const arr2 = [4, 5, 6];

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

Copy
const original = [1, 2, 3];
const copied = [...original];

console.log(copied); // [1, 2, 3]

Copy
const obj1 = { a: 1, b: 2 };
const obj2 = { b: 3, c: 4 };

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

Copy
const obj1 = { a: 1, b: 2 };
const copiedObj = { ...obj1 }; // {a: 1, b: 2}

console.log(copiedObj);