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Explanation

The spread operator (...) expands arrays or objects into individual elements.

Code:

const arr1 = [1,2];
const arr2 = [...arr1,3,4];

Explanation

Spread is commonly used to copy arrays.

Code:

const copy = [...arr1];

Explanation

Spread merges multiple objects together.

Code:

const user = {name:'John'};
const info = {...user, age:25};

Explanation

The rest operator collects multiple values into a single array.

Code:

function sum(...numbers) {
  console.log(numbers);
}

Explanation

Rest is useful for functions with variable numbers of arguments.

Code:

sum(10,20,30);