linked_list.js

function make_node(value) {
    return {
        value: value,
        next: null,
    };
}

var first = make_node(1);
var second = make_node(2);
var third = make_node(4);

first.next = second;
second.next = third;

var head = first;

var current = first;
while (current !== null) {
    console.log(current.value);
    current = current.next;
}