Insert node at beginning of linked list in typescript

Ts program for Insert node at beginning of linked list. Here more solutions.

/*
    TypeScript program for
    Insert node at beginning of linked list
*/
// Linked list node
class LinkNode
{
	public data: number;
	public next: LinkNode;
	constructor(data: number)
	{
		this.data = data;
		this.next = null;
	}
}
class SingleLL
{
	public head: LinkNode;
	constructor()
	{
		this.head = null;
	}
	// Adding new node at beginning of linked list
	public addNode(data: number)
	{
		// Create new node
		var node = new LinkNode(data);
		// Connect current node to previous head
		node.next = this.head;
		this.head = node;
	}
	// Display linked list element
	public display()
	{
		if (this.head == null)
		{
			return;
		}
		var temp = this.head;
		// iterating linked list elements
		while (temp != null)
		{
			console.log(" " + temp.data );
			// Visit to next node
			temp = temp.next;
		}
		console.log(" NULL");
	}
}
var sll = new SingleLL();
// Linked list
// 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
sll.addNode(8);
sll.addNode(7);
sll.addNode(6);
sll.addNode(5);
sll.addNode(4);
sll.addNode(3);
sll.addNode(2);
sll.addNode(1);
sll.display();
/*
 file : code.ts
 tsc --target es6 code.ts
 node code.js
 */

Output

 1
 2
 3
 4
 5
 6
 7
 8
 NULL