palindrome.js

// JavaScript Palindrome Checker: Checks whether a word is the same in reverse.
// Ignores punctuation, capitalization & spaces.

function isPalindrome(str) {
  // First convert the string into proper alphanumeric word
  const properStr = str.replace(/[_\W]/g, '').toLowerCase();

  // Now reverse the proper string
  const reverseStr = properStr.split('').reverse().join('');

  /*
  * Finally compare the proper string and reverse string and
  * return true or false
  */
  return properStr === reverseStr;
}

// Output to the console
console.log(isPalindrome('eye'));
console.log(isPalindrome('Mr. Owl ate my metal worm'));
console.log(isPalindrome('RAce C*_aR'));
console.log(isPalindrome('asdfggfrd'));