JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cloud.github.com/downloads/SteveSanderson/knockout/knockout-2.0.0.js"></script>
<script src="https://raw.github.com/SteveSanderson/knockout.mapping/master/build/output/knockout.mapping-latest.js"></script>
Current Value:<span data-bind="text: saved_value"></span><br/>
<input data-bind="value: saved_value"></input>

JavaScript

var data = {
    saved_value: "1"    
};

var viewModel = ko.mapping.fromJS(data);
ko.applyBindings(viewModel);