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Practice

Spread Operator

The Spread Operator consists of three dots (...).

  • The Spread Operator is used to 'spread' the elements of an array or object.

  • It is mainly used to combine or copy arrays and objects.


Examples of Using the Spread Operator​

Arrays​

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

const combined = [...arr1, ...arr2]; // [1, 2, 3, 4, 5, 6]
console.log(combined);
Copying Arrays
const original = [1, 2, 3];
const copied = [...original];

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

Objects​

Combining Objects
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 }
Copying Objects
const obj1 = { a: 1, b: 2 };
const copiedObj = { ...obj1 }; // {a: 1, b: 2}

console.log(copiedObj)

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