diff --git a/src/data-structures/linked-list/LinkedList.js b/src/data-structures/linked-list/LinkedList.js
index c7e075b0..ef7560da 100644
--- a/src/data-structures/linked-list/LinkedList.js
+++ b/src/data-structures/linked-list/LinkedList.js
@@ -2,8 +2,6 @@ import LinkedListNode from './LinkedListNode';
 import Comparator from '../../utils/comparator/Comparator';
 
 export default class LinkedList {
-  head: any;
-  tail: any;
   /**
    * @param {Function} [comparatorFunction]
    */
@@ -281,20 +279,20 @@ export default class LinkedList {
     let node2Prev = null;
     let node1 = this.head;
     let node2 = this.head;
-  
+
     // elements are same, no swap to be made
     if (data1 === data2) {
       return;
     }
-    
+
     while (node1 !== null) {
-      if (node1.data === data1) { 
+      if (node1.data === data1) {
         break;
       }
       node1Prev = node1;
       node1 = node1.next;
     }
-    
+
     while (node2 !== null) {
       if (node2.data === data2) {
         break;
@@ -302,28 +300,26 @@ export default class LinkedList {
       node2Prev = node2;
       node2 = node2.next;
     }
-    
+
     // swap not possible, one or more element not in list
     if (node1 === null || node2 === null) {
       return;
     }
-  
+
     if (node1Prev === null) {
       this.head = node2;
     } else {
       node1Prev.setNextNode(node2);
     }
-  
-    if (node2Prev === null) { 
+
+    if (node2Prev === null) {
       this.head = node1;
     } else {
       node2Prev.setNextNode(node1);
     }
-    
-    let temp = node1.next;
+
+    const temp = node1.next;
     node1.setNextNode(node2.next);
-    node2.setNextNode(temp); 
+    node2.setNextNode(temp);
   }
-  
-  
 }