used .tolowercase metheod to convert every string to lower changes

I used also .replace with regular expression that will match anything between A-Z, and a-z and replace afterwards
processed the string using .split, .reverse, and .join method
and the function return true if processedString is equal to reversedString;

09_palindromes/palindromes.js

@@ -1,6 +1,14 @@
-const palindromes = function () {
-
-};
-
+const palindromes = function(string) {
+    let processedString = string.toLowerCase().replace(/[^A-Za-z]/g, ""); 
+    
+    let reversedString = (
+      processedString
+        .split("")      // ["v","u","d","a","n","g"]
+        .reverse()      // ["g","n","a","d","u","v"]
+        .join("")      // "gnaduv"
+    );
+    return processedString == reversedString; // false because "vudang" =! "gnaduv"
+  };
+palindromes('racecar')
 // Do not edit below this line
 module.exports = palindromes;