javascript creates a new array with all sub-array elements code example
Example: js ,flat
const numbers = [1, 2, [3, 4, 5, [6, 7]]];
const flatNumbers = numbers.flat(2);
console.log(flatNumbers);
const numbers = [1, 2, [3, 4, 5, [6, 7]]];
const flatNumbers = numbers.flat(2);
console.log(flatNumbers);