function getReverse (value) {
  let reverse = 0;
  let digit = value
  while(digit > 0){
    const remainder = digit % 10
    reverse = (reverse*10) + remainder;
    digit = Math.floor(digit/10);
  }
  return reverse
}

function largestPalindromeProduct () {
  let largest = 0;
  const floor = 100;
  const ceiling = 999;
  for(let i = ceiling-1; i > floor; i--){
    for(let j = ceiling; j > floor; j--){
      const product = i*j;
      if(product === getReverse(product)){
        if(product > largest){
          largest = product;
        }
      }
    }
  }
  return largest;
}

const result = largestPalindromeProduct();
console.log(result);