---
id: aaa48de84e1ecc7c742e1124
title: Palindrome Checker
isRequired: true
challengeType: 5
---
## Description
Return true if the given string is a palindrome. Otherwise, return false.
A palindrome is a word or sentence that's spelled the same way both forward and backward, ignoring punctuation, case, and spacing.
Note
You'll need to remove all non-alphanumeric characters (punctuation, spaces and symbols) and turn everything into the same case (lower or upper case) in order to check for palindromes.
We'll pass strings with varying formats, such as "racecar", "RaceCar", and "race CAR" among others.
We'll also pass strings with special symbols, such as "2A3*3a2", "2A3 3a2", and "2_A3*3#A2".
Remember to use Read-Search-Ask if you get stuck. Write your own code.
## Instructions
## Tests
```yml
tests:
- text: palindrome("eye") should return a boolean.
testString: 'assert(typeof palindrome("eye") === "boolean", "palindrome("eye") should return a boolean.");'
- text: palindrome("eye") should return true.
testString: 'assert(palindrome("eye") === true, "palindrome("eye") should return true.");'
- text: palindrome("_eye") should return true.
testString: 'assert(palindrome("_eye") === true, "palindrome("_eye") should return true.");'
- text: palindrome("race car") should return true.
testString: 'assert(palindrome("race car") === true, "palindrome("race car") should return true.");'
- text: palindrome("not a palindrome") should return false.
testString: 'assert(palindrome("not a palindrome") === false, "palindrome("not a palindrome") should return false.");'
- text: 'palindrome("A man, a plan, a canal. Panama") should return true.'
testString: 'assert(palindrome("A man, a plan, a canal. Panama") === true, "palindrome("A man, a plan, a canal. Panama") should return true.");'
- text: palindrome("never odd or even") should return true.
testString: 'assert(palindrome("never odd or even") === true, "palindrome("never odd or even") should return true.");'
- text: palindrome("nope") should return false.
testString: 'assert(palindrome("nope") === false, "palindrome("nope") should return false.");'
- text: palindrome("almostomla") should return false.
testString: 'assert(palindrome("almostomla") === false, "palindrome("almostomla") should return false.");'
- text: 'palindrome("My age is 0, 0 si ega ym.") should return true.'
testString: 'assert(palindrome("My age is 0, 0 si ega ym.") === true, "palindrome("My age is 0, 0 si ega ym.") should return true.");'
- text: palindrome("1 eye for of 1 eye.") should return false.
testString: 'assert(palindrome("1 eye for of 1 eye.") === false, "palindrome("1 eye for of 1 eye.") should return false.");'
- text: 'palindrome("0_0 (: /-\ :) 0-0") should return true.'
testString: 'assert(palindrome("0_0 (: /-\ :) 0-0") === true, "palindrome("0_0 (: /-\ :) 0-0") should return true.");'
- text: palindrome("five|\_/|four") should return false.
testString: 'assert(palindrome("five|\_/|four") === false, "palindrome("five|\_/|four") should return false.");'
```
## Challenge Seed
```js
function palindrome(str) {
// Good luck!
return true;
}
palindrome("eye");
```
## Solution
```js
function palindrome(str) {
var string = str.toLowerCase().split(/[^A-Za-z0-9]/gi).join('');
var aux = string.split('');
if (aux.join('') === aux.reverse().join('')){
return true;
}
return false;
}
```