javascript example

Palindrome check in JavaScript

Test whether a string reads the same forwards and backwards. Run this JavaScript palindrome checker online.

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Normalize the string (lowercase, drop spaces) before comparing it to its reverse. That way “Never odd or even” can still count as a palindrome.

split, reverse, and join are enough for a playground demo. Click Open in editor and try your own phrases.

function isPalindrome(text) {
  const normalized = text.toLowerCase().replace(/[^a-z0-9]/g, "");
  const reversed = [...normalized].reverse().join("");
  return normalized === reversed;
}

console.log(isPalindrome("Never odd or even"));
console.log(isPalindrome("Code Arena"));