CheckPalindrome.js

// Palindrome check is case sensitive; i.e. Aba is not a palindrome
// input is a string
const checkPalindrome = (str) => {
 // check that input is a string
 if (typeof str !== 'string') {
 return 'Not a string'
 }
 if (str.length === 0) {
 return 'Empty string'
 }
 // Reverse only works with array, thus convert the string to array, reverse it and convert back to string
 // return as palindrome if the reversed string is equal to the input string
 const reversed = [...str].reverse().join('')
 return str === reversed ? 'Palindrome' : 'Not a Palindrome'
}

export { checkPalindrome }