number revers order in javascript with greatest first code example

Example 1: reverse int js

function reverseInt(n) {
  let reversed = n.toString().split("").reverse().join("");
  //from string to integer
  reversed = parseInt(reversed);

  if (n < 0) {
    return reversed * -1;
  }

  return reversed;
}

Example 2: js reverse number

const reversedNum = num => parseFloat(num.toString().split('').reverse().join('')) * Math.sign(num)