JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://github.com/downloads/SteveSanderson/knockout/knockout-1.3.0beta.js"></script>
<h3>Products</h3>

<ul data-bind="foreach: products">
    <li>
        <strong data-bind="text: name"></strong>
        &mdash;
        Last updated: <em data-bind="text: $parent.lastUpdated"></em>
    </li>
</ul>

CSS

body { font-family: Arial, Helvetica; margin: 5px; }
h3 { margin-top: 0 }

JavaScript

function appViewModel() {
    this.products = ko.observableArray([
        { name: "XBox", manufacturer: { company: "Microsoft" } },
        { name: "PlayStation", manufacturer: { company: "Sony" }  },
        { name: "Banana", manufacturer: null },
        { name: "Wii", manufacturer: { company: "Nintendo" }  },
        {items: ko.observableArray(
         {item:"Item1"},          {item:"Item2"},
    )}
    ]);
    this.items=ko.observableArray(
         {item:"Item1"},          {item:"Item2"},
    );
    
    this.lastUpdated = "Yesterday";
};

ko.applyBindings(new appViewModel());