The essence of a linked list in JavaScript

linked-list

// A single node
var node1 = {
	data: null,
	next: null
};
    
// Add data to node
node1.data = 12;

// Create another node
var node2 = {
	data: null,
	next: null
};

// Link (aha!) first node to second
node1.next = node2;