JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://github.com/SteveSanderson/knockout/raw/master/build/output/knockout-latest.debug.js"></script>
<script src="https://github.com/SteveSanderson/knockout.mapping/raw/master/build/output/knockout.mapping-latest.debug.js"></script>
<script src="https://github.com/jquery/jquery-tmpl/raw/master/jquery.tmpl.js"></script>
<input type="text" value="Original Value" data-bind="value: description, valueUpdate: 'afterkeydown'" />

JavaScript

var viewModel = { 
    description:ko.observable("")    
    };    

ko.applyBindings(viewModel);