Update the coding style for JavaScript (#329)

* Fix bug before commit 5eae708

* Update queue.md

* Update the coding style for JavaScript

---------

Co-authored-by: Yudong Jin <krahets@163.com>

codes/javascript/include/ListNode.js

@@ -11,37 +11,41 @@ class ListNode {
     val;
     next;
     constructor(val, next) {
-        this.val = (val === undefined ? 0 : val); 
-        this.next = (next === undefined ? null : next); 
-    }
-    
-    /**
-     * Generate a linked list with an array
-     * @param arr
-     * @return
-     */
-    arrToLinkedList(arr) {
-        const dum = new ListNode(0);
-        let head = dum;
-        for (const val of arr) {
-            head.next = new ListNode(val);
-            head = head.next;
-        }
-        return dum.next;
-    }
-
-    /**
-     * Get a list node with specific value from a linked list
-     * @param head
-     * @param val
-     * @return
-     */
-    getListNode(head, val) {
-        while (head !== null && head.val !== val) {
-            head = head.next;
-        }
-        return head;
+        this.val = (val === undefined ? 0 : val);
+        this.next = (next === undefined ? null : next);
     }
 }
 
-module.exports = ListNode
+/**
+ * Generate a linked list with an array
+ * @param arr
+ * @return
+ */
+function arrToLinkedList(arr) {
+    const dum = new ListNode(0);
+    let head = dum;
+    for (const val of arr) {
+        head.next = new ListNode(val);
+        head = head.next;
+    }
+    return dum.next;
+}
+
+/**
+ * Get a list node with specific value from a linked list
+ * @param head
+ * @param val
+ * @return
+ */
+function getListNode(head, val) {
+    while (head !== null && head.val !== val) {
+        head = head.next;
+    }
+    return head;
+}
+
+module.exports = {
+    ListNode,
+    arrToLinkedList,
+    getListNode
+};