Bubble sort on linked list in node js

Js program for Bubble sort on linked list.

// Node Js program for
// Bubble Sort For Linked List
class Node
{
    constructor(data)
    {
        this.data = data;
        this.next = null;
    }
}
class LinkedList
{
    // Class constructors
    constructor()
    {
        this.head = null;
    }
    // Add node at the beginning of linked list
    insert(value)
    {
        // Create a new node
        var node = new Node(value);
        // Add node at front
        node.next = this.head;
        // Make new head
        this.head = node;
    }
    // Display all elements
    display()
    {
        if (this.head != null)
        {
            var temp = this.head;
            while (temp != null)
            {
                // Display node value
                console.log("  " + temp.data);
                // Visit to next node
                temp = temp.next;
}
        }
        else
        {
            console.log("Empty Linked list");
        }
    }
    // Perform bubble sort in single linked list
    bubbleSort()
    {
        if (this.head != null)
        {
            var current = null;
            var status = false;
            do
            {
                // Start with first node
                current = this.head;
                // Reset working status
                status = false;
                while (current != null && current.next != null)
                {
                    if (current.data > current.next.data)
                    {
                        // Swap node values
                        current.data = current.data + current.next.data;
                        current.next.data = current.data - current.next.data;
                        current.data = current.data - current.next.data;
                        // When node value change
                        status = true;
                    }
                    // Visit to next node
                    current = current.next;
}
            } while (status);
        }
        else
        {
            console.log("Empty Linked list");
        }
    }
}
function main()
    {
        var task = new LinkedList();
        // Insert element of linked list
        task.insert(15);
        task.insert(5);
        task.insert(42);
        task.insert(9);
        task.insert(50);
        task.insert(7);
        console.log(" Before sort : ");
        // Display all node
        task.display();
        task.bubbleSort();
        console.log("\n After sort  : ");
        task.display();
    }
 // Start program execution
main();

Output

 Before sort :
  7
  50
  9
  42
  5
  15

 After sort  :
  5
  7
  9
  15
  42
  50