Check for Palindromes

Check for Palindromes.js

function palindrome(str) {
  // Good luck!

//Empty array
var array1 = [];
// alert("array1 is an " + typeof(array1));
  
//Empty array
var array2 = [];
// alert("array2 is an " + typeof(array2));
  
//Turns all uppercase symbols in the string to lowercase symbols; array turns into string type
array1 = str.toLowerCase();
// alert("array1 is a " + typeof(array1));

//Removes all ("g" means "globally") non-alphanumeric symbols("W+"")(or replacing them with "");
//array1 turns into string type 
array1 = array1.replace(/\W+/g,"");
// alert("array1 is a " + typeof(array1));

//Removes all ("g" means "globally") underscores (or replacing them with "");
//array1 turns into string type
array1 = array1.replace(/_/g,"");
// alert("array1 is a " + typeof(array1));

//Splits string into the array1, reverse elements in the array1, joins elements of the array1 into the string
array1 = array1.split("").reverse().join("");
// alert("array1 is a " + typeof(array1));

//Splits string into the array2, reverse elements in the array2, joins elements of the array2 into the string  
array2 = array1.split("").reverse().join("");
// alert("array2 is a " + typeof(array2));

//COMPARES array1 AND array2. IF THEY ARE STRICTLY EQUAL, THEN THE "str" IS A PALINDROME.
//IF THEY ARE NOT STRICTLY EQUAL, THEN THE "str" IS NOT A PALINDROME.
if (array1 === array2) {
    
    return true;
    
}
  else {
    return false;
      
}

}

palindrome("eye");