const numStr = "123456";
const numArr = strNum.split('').map((item) => parseInt(item, 10))
//OUTPUT
[1, 2, 3, 4, 5, 6]
// === STEP BY STEP ===
const step1 = numStr.split('')
// -> ['1', '2', '3', '4', '5', '6']
const step2 = step1.map((item) => parseInt(item))
// -> [1, 2, 3, 4, 5, 6]
const toNumbers = arr => arr.map(Number);
toNumbers(['1', '2', '3','4']); // [1, 2, 3, 4]
const stringArr = ["5", "4", "6", "2"];
const numArr = stringArr.map((item) => parseInt(item, 10));
//convert array to string first and use this code
var y =x.toString().split(',').map(Number)
const atrArr = ['7', '2', '5']
let numbersArr = strArr.map(c => +c); //[7, 2, 5]