Effectively insert node at beginning of circular linked list in node js

Js program for Effectively insert node at beginning of circular linked list . Here problem description and explanation.

// Node JS Program 
// Insert node at beginning of circular linked list
// Using head and tail nodes

// Define class of linked list Node
class LinkNode
{
	constructor(data, first)
	{
		// Set node value
		this.data = data;
		this.next = first;
	}
}
class CircularLinkedList
{
	constructor()
	{
		this.head = null;
		this.tail = null;
	}
	// Insert node at begining of circular linked list
	insert(value)
	{
		// Create a node
		var node = new LinkNode(value, this.head);
		if (this.tail == null)
		{
			// First node of linked list
			this.tail = node;
		}
		// Make new head
		this.head = node;
		// Connecting the last node to the top of the next field
		this.tail.next = this.head;
	}
	// Display node element of circular linked list
	display()
	{
		if (this.head == null)
		{
			console.log("Empty Linked List");
		}
		else
		{
			process.stdout.write("Linked List Element :");
			var temp = this.head;
			// iterate linked list
			while (temp != null)
			{
				// Display node
				process.stdout.write("  " + temp.data);
				if (temp == this.tail)
				{
					// Stop iteration
					// Or break;
					return;
				}
				// Visit to next node
				temp = temp.next;
			}
		}
	}
}

function main()
{
	var task = new CircularLinkedList();
	// Add following linked list nodes
	task.insert(8);
	task.insert(7);
	task.insert(6);
	task.insert(5);
	task.insert(4);
	task.insert(3);
	task.insert(2);
	task.insert(1);
	// Display node
	task.display();
}
// Start program execution
main();

Output

Linked List Element :  1  2  3  4  5  6  7  8


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