Answer in Web Application for Andre #114155

// standart es6
const palindrome = (str) => {
  const reg = /[W_]/g;
  let lowRegStr = str.toLowerCase().replace(reg, '');
  let reverseStr = lowRegStr.split('').reverse().join('');
  return reverseStr === lowRegStr;
}

palindrome("A man, a plan, a canal. Panama");

// common js
function palindrome(str) {
  var reg = /[W_]/g;
  var lowRegStr = str.toLowerCase().replace(reg, '');
  var reverseStr = lowRegStr.split('').reverse().join('');
  return reverseStr === lowRegStr;
}

palindrome("A man, a plan, a canal. Panama");