adds link to palindrome number solution in js in readme file

Author: anishLearnsToCode

README.md

@@ -3,7 +3,7 @@
 ![problems-solved](https://img.shields.io/badge/Problems%20Solved-542/2081-1f425f.svg)
 ![problems-solved-java](https://img.shields.io/badge/Java-542/2081-1abc9c.svg)
 ![problems-solved-python](https://img.shields.io/badge/Python-185/2081-1abc9c.svg)
-![problems-solved-javascript](https://img.shields.io/badge/Python-3/2081-1abc9c.svg)
+![problems-solved-javascript](https://img.shields.io/badge/JavaScript-4/2081-1abc9c.svg)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](CONTRIBUTING.md)
 [![cp](https://img.shields.io/badge/also%20see-Competitve%20Programming-1f72ff.svg)](https://github.com/anishLearnsToCode/competitive-programming)
 
@@ -19,7 +19,7 @@
 |  6   | [Zigzag Conversion](https://leetcode.com/problems/zigzag-conversion)                                                                                      |                                                                                      [![Java](assets/java.png)](src/ZigZagConversion.java)                                                                                       |                                                                                                                                   |
 |  7   | [Reverse Integer](https://leetcode.com/problems/reverse-integer)                                                                                          |                            [![Java](assets/java.png)](src/ReverseInteger.java) [![Python](assets/python.png)](python/reverse_integer.py) [![js](assets/javascript.png)](javascript/ReverseInteger.js)                            | [![java-yt](assets/java-yt.png)](https://youtu.be/7bOhyl5lWjI) [![python-yt](assets/python-yt.png)](https://youtu.be/lmLG30TLcSg) |
 |  8   | [String to Integer (atoi)](https://leetcode.com/problems/string-to-integer-atoi)                                                                          |                                                                                     [![Java](assets/java.png)](src/StringToIntegerAtoi.java)                                                                                     |                                                                                                                                   |
-|  9   | [PalindromeNumber](https://leetcode.com/problems/palindrome-number/)                                                                                      |                                                        [![Java](assets/java.png)](src/PalindromeNumber.java) [![Python](assets/python.png)](python/palindrome_number.py)                                                         |                                                                                                                                   |
+|  9   | [Palindrome Number](https://leetcode.com/problems/palindrome-number)                                                                                      |                         [![Java](assets/java.png)](src/PalindromeNumber.java) [![Python](assets/python.png)](python/palindrome_number.py) [![js](assets/javascript.png)](javascript/PalindromeNumber.js)                         |                                                                                                                                   |
 |  11  | [Container With Most Water](https://leetcode.com/problems/container-with-most-water)                                                                      |                                                                                    [![Java](assets/java.png)](src/ContainerWitMostWater.java)                                                                                    |                                                                                                                                   |
 |  12  | [Integer to Roman](https://leetcode.com/problems/integer-to-roman)                                                                                        |                                                                                       [![Java](assets/java.png)](src/IntegerToRoman.java)                                                                                        |                                                                                                                                   |
 |  13  | [Roman To Integer](https://leetcode.com/problems/roman-to-integer/)                                                                                       |                                                          [![Java](assets/java.png)](src/RomanToInteger.java) [![Python](assets/python.png)](python/roman_to_integer.py)                                                          | [![java-yt](assets/java-yt.png)](https://youtu.be/BCue_mO_81A) [![python-yt](assets/python-yt.png)](https://youtu.be/8h_yGTNvKMA) |

javascript/PalindromeNumber.js

@@ -2,7 +2,7 @@
 // T: O(log(n))
 // S: O(1)
 
-const isPalindrome = (x) => {
+const isPalindrome = x => {
   if (x < 0 || (x % 10 === 0 && x !== 0)) {
     return false;
   }
@@ -13,8 +13,6 @@ const isPalindrome = (x) => {
     sum = sum * 10 + remainder;
     x = Math.floor(x / 10);
   }
-  if (sum === result) {
-    return true;
-  }
-  return false;
+
+  return sum === result;
 };