Using recursion to determine whether a word is a palindrome

function isPalindrome(str, start = 0, end = str.length - 1) {
  if (start > end) return true;
  if (str[start] !== str[end]) return false;
  return isPalindrome(str, start + 1, end - 1);
}

console.log(isPalindrome('tattat')); // Output: true

Time Complexity O(n)/Space Complexity O(n)