<prompt> Unda chaguo la kukokotoa la JavaScript ambalo huchukua mfuatano wa ingizo na kurudisha kamba yake ndefu zaidi ya palindrome.  <response>: kazi ndefu zaidiPalindromestr ikiwa !str str.length 1 kurudi str; acha ndefu ; kwa wacha i 0; i str.length; i const palindromeOdd expandAroundCenterstr, i, i; const palindromeEven expandAroundCenterstr, i, i 1; const longerPalindrome palindromeOdd.length palindromeEven.length ? palindromeOdd : palindromeHata; ikiwa longerPalindrome.length longest.length mrefu zaidi tenaPalindrome; kurudi kwa muda mrefu zaidi;kazi expandAroundCenterstr, kushoto, kulia wakati kushoto 0 kulia str.length strleft strkulia kushoto--; kulia; rudisha str.slice kushoto 1, kulia;console.loglongestPalindromebabad; Pato: bab au abaconsole.loglongestPalindromecbbd; Pato: bbconsole.loglongestPalindromeabcdefg; Pato: a 