$_Palindrome

JavaScript

function isPalindrome(str) {
    str = str.replace(/\W/g, '').toLowerCase();
    str2 = str.split('').reverse().join('');
    
    return (str == str.split('').reverse().join(''));
}

console.log(isPalindrome("level"));             
console.log(isPalindrome("levels"));        
console.log(isPalindrome("A car, a man, a maraca"));