Flatten Concat code example

Example 1: flatten nested array javascript

const arr2 = [1, 2, [3, 4, [5, 6]]];
arr2.flat();

Example 2: js ,flat

const numbers = [1, 2, [3, 4, 5, [6, 7]]];
const flatNumbers = numbers.flat(2);

console.log(flatNumbers);