Added JavaScript example for single linked list

Author: tshemsedinov

JavaScript/1-single.js

@@ -0,0 +1,14 @@
+'use strict';
+
+function Node(prev, data) {
+  this.prev = prev;
+  this.data = data;
+}
+
+let n1 = new Node(null, { name: 'first' });
+let n2 = new Node(n1, { name: 'second' });
+let n3 = new Node(n2, { name: 'third' });
+
+console.dir(n1);
+console.dir(n2);
+console.dir(n3);