feat(strings): Add Palindrome Checker for JavaScript

strings/README.md

@@ -3,3 +3,7 @@
 ### C or C++
 
 1. [Palindrome Check](c-or-cpp/palindrome.c)
+
+### JavaScript
+
+1. [Palindrome Check](js/palindrome.js)

strings/js/palindrome.js

@@ -0,0 +1,22 @@
+// JavaScript Palindrome Checker: Checks whether a word is the same in reverse. Ignores punctuation, capitalization & spaces.
+
+function isPalindrome(str) {
+    // First convert the string into proper alpha-numeric word
+    let properStr = str
+        .replace(/[_\W]/g, "")
+        .toLowerCase();
+    
+    // Now reverse the proper string
+    let reverseStr = properStr
+        .split("")
+        .reverse()
+        .join("");
+    
+    // Finally compare the proper string and reverse string and return true or false
+    return properStr === reverseStr;
+}
+
+// Output to the console
+console.log(isPalindrome("eye"));
+console.log(isPalindrome("Mr. Owl ate my metal worm"));
+console.log(isPalindrome("RAce C*_aR"));